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Groups > comp.os.linux.misc > #87133 > unrolled thread

Redundancy/Survival

Started byc186282 <c186282@nnada.net>
First post2026-05-26 02:21 -0400
Last post2026-05-26 17:21 +0200
Articles 20 on this page of 187 — 16 participants

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Contents

  Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-26 02:21 -0400
    Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-26 08:46 +0200
      Re: Redundancy/Survival Marco Moock <mm@dorfdsl.de> - 2026-05-26 09:49 +0200
        Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-26 04:47 -0400
        Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-26 11:25 +0200
        Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-05-26 09:53 +0000
      Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-26 04:38 -0400
        Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-26 11:35 +0200
        Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-05-26 22:09 +0000
          Re: Redundancy/Survival John Ames <commodorejohn@gmail.com> - 2026-05-26 16:17 -0700
            Re: Redundancy/Survival Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-05-27 00:02 +0000
              Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-27 00:11 -0400
                Re: Redundancy/Survival Marco Moock <mm@dorfdsl.de> - 2026-05-28 10:32 +0200
              Re: Redundancy/Survival Nuno Silva <nunojsilva@invalid.invalid> - 2026-05-27 08:41 +0100
                Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-27 11:04 +0200
                  Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-28 03:31 -0400
                    Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-28 09:18 +0100
                    Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-28 13:42 +0200
                      Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-28 15:01 +0100
                      Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-28 21:34 -0400
                        Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-29 11:07 +0100
                        Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-29 12:55 +0200
                          Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-29 12:14 +0100
                            Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-29 13:36 +0200
                              Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-29 13:26 +0100
                                Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-29 19:36 +0200
                            Re: Redundancy/Survival Richard Kettlewell <invalid@invalid.invalid> - 2026-05-29 17:24 +0100
                              Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-29 19:37 +0200
                              Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-29 19:36 +0100
                                Re: Redundancy/Survival Richard Kettlewell <invalid@invalid.invalid> - 2026-05-29 22:34 +0100
                          Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-30 04:29 -0400
                            Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-30 13:09 +0200
                              Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-30 23:29 -0400
                                Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-05-31 21:45 -0400
                                  Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 12:15 +0200
                                    Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-01 18:53 -0400
                                      Re: Redundancy/Survival Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-06-02 01:46 +0000
                                        Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-02 03:01 -0400
                                        Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-02 18:12 +0000
                                      Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 10:16 +0200
                                      Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-02 18:09 +0000
                                        Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 21:26 +0200
                                          Re: Redundancy/Survival Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-03 12:48 +0100
                                    Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-02 02:58 -0400
                                      Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-02 11:11 +0100
                                        Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-02 22:15 -0400
                                          Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-02 22:32 -0400
                                            Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-03 02:33 -0400
                                          Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 11:57 +0100
                    Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-05-29 04:30 +0000
                      Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-29 01:34 -0400
                        Re: Redundancy/Survival rbowman <bowman@montana.com> - 2026-05-29 06:36 +0000
                          Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-31 00:38 -0400
                            Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-05-31 05:09 +0000
                              Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-31 03:10 -0400
                                Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-05-31 07:14 +0000
                                  Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-01 00:49 -0400
                                    Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-01 04:57 +0000
                        Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 03:20 +0000
                          Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 19:45 +0200
                            Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 18:30 +0000
                              Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 22:27 +0200
                                Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 10:49 +0000
                                  Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 13:16 +0200
                                    Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-03 00:00 -0400
                                  Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-02 18:35 +0000
                                Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-02 18:21 +0000
                                  Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 18:25 +0000
                                    Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 21:36 +0200
                                      Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-03 02:06 +0000
                                Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 11:32 +0200
                                  Re: Redundancy/Survival Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-03 11:43 +0100
                                    Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 13:05 +0200
                                      Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 12:14 +0100
                                        Re: Redundancy/Survival Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-03 12:31 +0100
                                          Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 14:43 +0100
                                    Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 12:13 +0100
                              Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-01 19:00 -0400
                                Re: Redundancy/Survival Robert Riches <spamtrap42@jacob21819.net> - 2026-06-02 17:44 +0000
                                  Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 17:54 +0000
                                    Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-02 16:57 -0400
                                      Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 21:02 +0000
                                      Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 11:41 +0200
                                  Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-03 02:13 +0000
                                    Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 11:47 +0200
                                    Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 11:49 +0100
                                Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-03 02:10 +0000
                                  Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-02 22:29 -0400
                                    Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 11:52 +0200
                                  Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 11:49 +0200
                                  Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 11:56 +0100
                      Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-29 02:17 -0400
                        Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 03:50 +0000
                          Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-01 01:07 -0400
                            Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 12:47 +0200
                              Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 17:36 +0000
                                Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 22:33 +0200
                                  Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-03 02:25 +0000
                                    Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-03 02:12 -0400
                                      Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 12:03 +0200
                                        Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 12:06 +0100
                                      Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 12:02 +0100
                            Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-01 12:26 +0100
                            Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 17:31 +0000
                              Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 22:49 +0200
                                Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-03 02:37 +0000
                      Re: Redundancy/Survival not@telling.you.invalid (Computer Nerd Kev) - 2026-05-30 09:09 +1000
                        Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-30 13:17 +0200
                          Re: Redundancy/Survival not@telling.you.invalid (Computer Nerd Kev) - 2026-05-31 07:33 +1000
                            Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-31 00:14 -0400
                              Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-31 12:09 +0100
                                Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-01 00:51 -0400
                                  Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-01 12:28 +0100
                            Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-31 12:58 +0200
                Re: Redundancy/Survival Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-05-27 20:51 +0000
                  Re: Redundancy/Survival John Ames <commodorejohn@gmail.com> - 2026-05-27 14:02 -0700
                    Re: Redundancy/Survival not@telling.you.invalid (Computer Nerd Kev) - 2026-05-28 08:54 +1000
                      Re: Redundancy/Survival Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-05-28 05:04 +0000
                    Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-28 03:54 -0400
                      Re: Redundancy/Survival Andy Burns <usenet@andyburns.uk> - 2026-05-28 09:15 +0100
                        Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 12:29 +0000
                      Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-28 13:45 +0200
                      Re: Redundancy/Survival Robert Riches <spamtrap42@jacob21819.net> - 2026-05-29 02:50 +0000
                        Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-29 01:17 -0400
                          Re: Redundancy/Survival rbowman <bowman@montana.com> - 2026-05-29 06:48 +0000
                            Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-30 04:25 -0400
                              Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-30 13:20 +0200
                              Re: Redundancy/Survival Robert Riches <spamtrap42@jacob21819.net> - 2026-05-30 14:16 +0000
                          Re: Redundancy/Survival Robert Riches <spamtrap42@jacob21819.net> - 2026-05-30 04:00 +0000
            Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-26 23:41 -0400
              Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-27 14:09 +0100
                Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-28 03:51 -0400
                  Re: Redundancy/Survival rbowman <bowman@montana.com> - 2026-05-28 17:08 +0000
                    Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-28 22:14 -0400
                      Re: Redundancy/Survival rbowman <bowman@montana.com> - 2026-05-29 04:41 +0000
                        Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-29 01:53 -0400
                          Re: Redundancy/Survival rbowman <bowman@montana.com> - 2026-05-29 06:32 +0000
                        Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 13:19 +0000
                          Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 22:52 +0200
                            Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-03 02:46 +0000
                              Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-03 00:27 -0400
                                Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-03 03:26 -0400
                              Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-03 03:03 -0400
                              Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 12:12 +0200
                                Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 12:08 +0100
                                  Re: Redundancy/Survival Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-03 12:33 +0100
                                    Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-03 14:45 +0100
                      Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 13:08 +0000
                        Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 22:55 +0200
                          Re: Redundancy/Survival Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-02 10:39 +0100
                            Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 13:21 +0200
                            Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-03 02:57 +0000
          Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-26 22:39 -0400
            Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-27 14:10 +0100
              Re: Redundancy/Survival not@telling.you.invalid (Computer Nerd Kev) - 2026-05-28 09:05 +1000
                Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-28 08:19 +0100
              Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-28 03:52 -0400
                Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-05-28 09:20 +0100
                  Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-28 20:34 -0400
                    Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-05-28 21:07 -0400
                      Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 13:40 +0000
                        Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-01 19:12 -0400
                          Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 10:28 +0200
                            Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-02 12:15 -0400
                              Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 16:19 +0000
                              Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 18:30 +0200
                                Re: Redundancy/Survival The Natural Philosopher <tnp@invalid.invalid> - 2026-06-02 18:29 +0100
                                Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-02 16:49 -0400
                                  Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-03 12:18 +0200
                          Re: Redundancy/Survival Marco Moock <mm@dorfdsl.de> - 2026-06-02 17:38 +0200
                            Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 15:48 +0000
                              Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-03 00:39 -0400
                            Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 17:55 +0200
                              Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 16:03 +0000
                                Re: Redundancy/Survival InterLinked <usenet@phreaknet.org> - 2026-06-02 12:22 -0400
                                  Re: Redundancy/Survival TheLastSysop <thelastsysop@dev.null> - 2026-06-02 16:36 +0000
                                Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-02 18:39 +0200
                                Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-06-03 00:48 -0400
                    Re: Redundancy/Survival rbowman <bowman@montana.com> - 2026-05-29 01:21 +0000
                      Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-29 02:08 -0400
                        Re: Redundancy/Survival rbowman <bowman@montana.com> - 2026-05-29 06:41 +0000
                Re: Redundancy/Survival Rich <rich@example.invalid> - 2026-06-01 13:23 +0000
                  Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-06-01 23:00 +0200
    Re: Redundancy/Survival Marco Moock <mm@dorfdsl.de> - 2026-05-26 09:44 +0200
      Re: Redundancy/Survival c186282 <c186282@nnada.net> - 2026-05-26 04:45 -0400
      Re: Redundancy/Survival "Carlos E.R." <robin_listas@es.invalid> - 2026-05-26 11:38 +0200
    Re: Redundancy/Survival "Worst Case" <fritz@spamexpire-202605.rodent.frell.theremailer.net> - 2026-05-26 17:21 +0200

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#87337

FromRich <rich@example.invalid>
Date2026-06-01 13:40 +0000
Message-ID<10vk256$27ab8$5@dont-email.me>
In reply to#87245
InterLinked <usenet@phreaknet.org> wrote:
> though for some reason I can only negotiate 33.6k.

33.6 is as high as you can negioate using digital to audio and audio to 
digital signal transmission (i.e., standard "modem" working) due to the 
underlying digitizing rate for all phone calls by the carriers.

> so something about the fiber arrangement seems to be interfering with 
> V.90/V.92 negotiation.)

Obtaining speeds higher than 33.6 requires:
1) copper between the modem and the dmarc in the exchange
2) the dmark in the switch being one that can have the analog to 
digital converter at the end of the copper turned off.

The higher speeds work by both ends driving the copper as if it were a 
digital baseband network link (i.e., somewhat akin to driving ethernet 
signaling over the line).

But, with any analog to digital converters in between mean you can't 
get better than 33.6.  And all the "fiber to your home, with a little 
box that drives your in house copper as if it were still connected to 
POTS" means there is a small analog to digital converter in the way 
(and no one decided to offer the ability to switch it off and drive the 
copper as digital baseband).

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#87350

FromInterLinked <usenet@phreaknet.org>
Date2026-06-01 19:12 -0400
Message-ID<10vl3kr$2ii0i$1@dont-email.me>
In reply to#87337
On 6/1/2026 9:40 AM, Rich wrote:
> InterLinked <usenet@phreaknet.org> wrote:
>> though for some reason I can only negotiate 33.6k.
> 
> 33.6 is as high as you can negioate using digital to audio and audio to
> digital signal transmission (i.e., standard "modem" working) due to the
> underlying digitizing rate for all phone calls by the carriers.
 >
>> so something about the fiber arrangement seems to be interfering with
>> V.90/V.92 negotiation.)
> 
> Obtaining speeds higher than 33.6 requires:
> 1) copper between the modem and the dmarc in the exchange
> 2) the dmark in the switch being one that can have the analog to
> digital converter at the end of the copper turned off.
>
> The higher speeds work by both ends driving the copper as if it were a
> digital baseband network link (i.e., somewhat akin to driving ethernet
> signaling over the line).
> 
> But, with any analog to digital converters in between mean you can't
> get better than 33.6.  And all the "fiber to your home, with a little
> box that drives your in house copper as if it were still connected to
> POTS" means there is a small analog to digital converter in the way
> (and no one decided to offer the ability to switch it off and drive the
> copper as digital baseband).

Yes, I'm aware of the 33.6 ceiling with conversions.

I don't think I mentioned it before, but I can get 36000 (not 33600) 
when calling certain modems. I've gotten it a few times when calling the 
dial-up ISP here in the US (there is really only one, no matter which 
reseller you use), but usually just 33600.

That demonstrates I can get speeds > 33.6k, but usually the negotiation 
fails (I can hear it too, it's not happy trying to negotiate V.90/V.92).

My point was that copper POTS customers can get speeds in the 40s/50s 
calling the same service, no problem at all, but I'm not able to do that 
with my service being delivered over fiber. Dial-up Internet speeds are 
actually *hampered* by fiber... how ironic is that?

So from my (consumer) perspective, fiber is a loser. It's inferior 
quality and connectivity and it doesn't work in a power outage. There's 
already coax in my area for CATV so the fiber was redundant to begin 
with for broadband. They crippled our phone service in favor of another 
expensive[1] and unregulated service... but it's great for the telco! 
Now the burden - and cost - of powering phone service is on the consumer.

The only scenario in which fiber wins in my book would be where your 
copper line is fed out of a SLC-96 that doesn't have a reliable power 
supply in emergencies, in which case if you happen to have enough backup 
power yourself, fiber would be better since it's passive (GPON).

[1] Oh, and even though my service is arguably inferior to copper, I 
don't pay any less than copper customers; still all the high taxes/fees 
associated with regulated service (which I have intentionally). So it's 
not copper that's expensive per se, it's regulated phone service 
regardless of technology.

[toc] | [prev] | [next] | [standalone]


#87361

From"Carlos E.R." <robin_listas@es.invalid>
Date2026-06-02 10:28 +0200
Message-ID<9rg2fmxp12.ln2@Telcontar.valinor>
In reply to#87350
On 2026-06-02 01:12, InterLinked wrote:
> On 6/1/2026 9:40 AM, Rich wrote:
>> InterLinked <usenet@phreaknet.org> wrote:
>>> though for some reason I can only negotiate 33.6k.
>>
>> 33.6 is as high as you can negioate using digital to audio and audio to
>> digital signal transmission (i.e., standard "modem" working) due to the
>> underlying digitizing rate for all phone calls by the carriers.
>  >
>>> so something about the fiber arrangement seems to be interfering with
>>> V.90/V.92 negotiation.)
>>
>> Obtaining speeds higher than 33.6 requires:
>> 1) copper between the modem and the dmarc in the exchange
>> 2) the dmark in the switch being one that can have the analog to
>> digital converter at the end of the copper turned off.
>>
>> The higher speeds work by both ends driving the copper as if it were a
>> digital baseband network link (i.e., somewhat akin to driving ethernet
>> signaling over the line).
>>
>> But, with any analog to digital converters in between mean you can't
>> get better than 33.6.  And all the "fiber to your home, with a little
>> box that drives your in house copper as if it were still connected to
>> POTS" means there is a small analog to digital converter in the way
>> (and no one decided to offer the ability to switch it off and drive the
>> copper as digital baseband).
> 
> Yes, I'm aware of the 33.6 ceiling with conversions.
> 
> I don't think I mentioned it before, but I can get 36000 (not 33600) 
> when calling certain modems. I've gotten it a few times when calling the 
> dial-up ISP here in the US (there is really only one, no matter which 
> reseller you use), but usually just 33600.
> 
> That demonstrates I can get speeds > 33.6k, but usually the negotiation 
> fails (I can hear it too, it's not happy trying to negotiate V.90/V.92).
> 
> My point was that copper POTS customers can get speeds in the 40s/50s 
> calling the same service, no problem at all, but I'm not able to do that 
> with my service being delivered over fiber. Dial-up Internet speeds are 
> actually *hampered* by fiber... how ironic is that?

Yes. The signal was digitized at your exchange, then transmitted to the 
remote exchange. which had a bank of signal processors that would 
process the digital signal instead of a modem, and get you that V90.

I worked for a telco that did precisely this (using the 5ESSS and the 
Lucent MAX TNT) around year 2000.

With fibre and VoIP you have a problem: you are probably using a codec. 
Maybe a lossy one.



> So from my (consumer) perspective, fiber is a loser. It's inferior 
> quality and connectivity and it doesn't work in a power outage. There's 
> already coax in my area for CATV so the fiber was redundant to begin 
> with for broadband. They crippled our phone service in favor of another 
> expensive[1] and unregulated service... but it's great for the telco! 
> Now the burden - and cost - of powering phone service is on the consumer.

Well, if you want to use dial up modem, you are using the wrong technology.

> 
> The only scenario in which fiber wins in my book would be where your 
> copper line is fed out of a SLC-96 that doesn't have a reliable power 
> supply in emergencies, in which case if you happen to have enough backup 
> power yourself, fiber would be better since it's passive (GPON).
> 
> [1] Oh, and even though my service is arguably inferior to copper, I 
> don't pay any less than copper customers; still all the high taxes/fees 
> associated with regulated service (which I have intentionally). So it's 
> not copper that's expensive per se, it's regulated phone service 
> regardless of technology.


-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

[toc] | [prev] | [next] | [standalone]


#87372

FromInterLinked <usenet@phreaknet.org>
Date2026-06-02 12:15 -0400
Message-ID<10vmvit$325bn$1@dont-email.me>
In reply to#87361
On 6/2/2026 4:28 AM, Carlos E.R. wrote:
> On 2026-06-02 01:12, InterLinked wrote:
>> On 6/1/2026 9:40 AM, Rich wrote:
>>> InterLinked <usenet@phreaknet.org> wrote:
>>>> though for some reason I can only negotiate 33.6k.
>>>
>>> 33.6 is as high as you can negioate using digital to audio and audio to
>>> digital signal transmission (i.e., standard "modem" working) due to the
>>> underlying digitizing rate for all phone calls by the carriers.
>>  >
>>>> so something about the fiber arrangement seems to be interfering with
>>>> V.90/V.92 negotiation.)
>>>
>>> Obtaining speeds higher than 33.6 requires:
>>> 1) copper between the modem and the dmarc in the exchange
>>> 2) the dmark in the switch being one that can have the analog to
>>> digital converter at the end of the copper turned off.
>>>
>>> The higher speeds work by both ends driving the copper as if it were a
>>> digital baseband network link (i.e., somewhat akin to driving ethernet
>>> signaling over the line).
>>>
>>> But, with any analog to digital converters in between mean you can't
>>> get better than 33.6.  And all the "fiber to your home, with a little
>>> box that drives your in house copper as if it were still connected to
>>> POTS" means there is a small analog to digital converter in the way
>>> (and no one decided to offer the ability to switch it off and drive the
>>> copper as digital baseband).
>>
>> Yes, I'm aware of the 33.6 ceiling with conversions.
>>
>> I don't think I mentioned it before, but I can get 36000 (not 33600) 
>> when calling certain modems. I've gotten it a few times when calling 
>> the dial-up ISP here in the US (there is really only one, no matter 
>> which reseller you use), but usually just 33600.
>>
>> That demonstrates I can get speeds > 33.6k, but usually the 
>> negotiation fails (I can hear it too, it's not happy trying to 
>> negotiate V.90/V.92).
>>
>> My point was that copper POTS customers can get speeds in the 40s/50s 
>> calling the same service, no problem at all, but I'm not able to do 
>> that with my service being delivered over fiber. Dial-up Internet 
>> speeds are actually *hampered* by fiber... how ironic is that?
> 
> Yes. The signal was digitized at your exchange, then transmitted to the 
> remote exchange. which had a bank of signal processors that would 
> process the digital signal instead of a modem, and get you that V90.
> 
> I worked for a telco that did precisely this (using the 5ESSS and the 
> Lucent MAX TNT) around year 2000.
> 
> With fibre and VoIP you have a problem: you are probably using a codec. 
> Maybe a lossy one.

No, it's G.711 ulaw, as it should be, same as TDM.

I can dial up at 33.6k and it will stay up for hours. Quality of the 
connection itself is not the issue. I think there is some "audio" part 
of the V.92 handshake that is getting tripped up by the ONT or something 
like that.

>> So from my (consumer) perspective, fiber is a loser. It's inferior 
>> quality and connectivity and it doesn't work in a power outage. 
>> There's already coax in my area for CATV so the fiber was redundant to 
>> begin with for broadband. They crippled our phone service in favor of 
>> another expensive[1] and unregulated service... but it's great for the 
>> telco! Now the burden - and cost - of powering phone service is on the 
>> consumer.
> 
> Well, if you want to use dial up modem, you are using the wrong technology.

I don't have a choice, there's no copper here, I am forced to use fiber.

[toc] | [prev] | [next] | [standalone]


#87373

FromTheLastSysop <thelastsysop@dev.null>
Date2026-06-02 16:19 +0000
Message-ID<2237a70cbaafcb587eb9@dev.null>
In reply to#87372
>On Tue, 2 Jun 2026 12:15:25 -0400, InterLinked <usenet@phreaknet.org> wrote:
>On 6/2/2026 4:28 AM, Carlos E.R. wrote:
>> On 2026-06-02 01:12, InterLinked wrote:
>>> On 6/1/2026 9:40 AM, Rich wrote:
>>>> InterLinked <usenet@phreaknet.org> wrote:
>>>>> though for some reason I can only negotiate 33.6k.
>>>>
>>>> 33.6 is as high as you can negioate using digital to audio and audio to
>>>> digital signal transmission (i.e., standard "modem" working) due to the
>>>> underlying digitizing rate for all phone calls by the carriers.
>>>  >
>>>>> so something about the fiber arrangement seems to be interfering with
>>>>> V.90/V.92 negotiation.)
>>>>
>>>> Obtaining speeds higher than 33.6 requires:
>>>> 1) copper between the modem and the dmarc in the exchange
>>>> 2) the dmark in the switch being one that can have the analog to
>>>> digital converter at the end of the copper turned off.
>>>>
>>>> The higher speeds work by both ends driving the copper as if it were a
>>>> digital baseband network link (i.e., somewhat akin to driving ethernet
>>>> signaling over the line).
>>>>
>>>> But, with any analog to digital converters in between mean you can't
>>>> get better than 33.6.  And all the "fiber to your home, with a little
>>>> box that drives your in house copper as if it were still connected to
>>>> POTS" means there is a small analog to digital converter in the way
>>>> (and no one decided to offer the ability to switch it off and drive the
>>>> copper as digital baseband).
>>>
>>> Yes, I'm aware of the 33.6 ceiling with conversions.
>>>
>>> I don't think I mentioned it before, but I can get 36000 (not 33600)
>>> when calling certain modems. I've gotten it a few times when calling
>>> the dial-up ISP here in the US (there is really only one, no matter
>>> which reseller you use), but usually just 33600.
>>>
>>> That demonstrates I can get speeds > 33.6k, but usually the
>>> negotiation fails (I can hear it too, it's not happy trying to
>>> negotiate V.90/V.92).
>>>
>>> My point was that copper POTS customers can get speeds in the 40s/50s
>>> calling the same service, no problem at all, but I'm not able to do
>>> that with my service being delivered over fiber. Dial-up Internet
>>> speeds are actually *hampered* by fiber... how ironic is that?
>>
>> Yes. The signal was digitized at your exchange, then transmitted to the
>> remote exchange. which had a bank of signal processors that would
>> process the digital signal instead of a modem, and get you that V90.
>>
>> I worked for a telco that did precisely this (using the 5ESSS and the
>> Lucent MAX TNT) around year 2000.
>>
>> With fibre and VoIP you have a problem: you are probably using a codec.
>> Maybe a lossy one.
>
>No, it's G.711 ulaw, as it should be, same as TDM.
>
>I can dial up at 33.6k and it will stay up for hours. Quality of the
>connection itself is not the issue. I think there is some "audio" part
>of the V.92 handshake that is getting tripped up by the ONT or something
>like that.
>
>>> So from my (consumer) perspective, fiber is a loser. It's inferior
>>> quality and connectivity and it doesn't work in a power outage.
>>> There's already coax in my area for CATV so the fiber was redundant to
>>> begin with for broadband. They crippled our phone service in favor of
>>> another expensive[1] and unregulated service... but it's great for the
>>> telco! Now the burden - and cost - of powering phone service is on the
>>> consumer.
>>
>> Well, if you want to use dial up modem, you are using the wrong technology.
>
>I don't have a choice, there's no copper here, I am forced to use fiber.

A practical thing to check is whether the modem is repeatedly trying the PCM
part of V.90/V.92 and then falling back.  On a lot of modems the CONNECT banner
alone is not enough; the extended result/log will show the final modulation and
sometimes the reason for the retrain/fallback.

If you only need the link to be boring and reliable, I would try an init string
that disables V.90/V.92 and forces V.34.  That avoids the PCM negotiation
entirely and turns the problem into ordinary analog modem over G.711.  You may
lose the occasional 36000 connect, but you also avoid the failed negotiation
dance.

If you want to chase the higher rate, look for anything in the ONT/ATA path that
is meant to "help" voice: echo cancellation, VAD/silence suppression, comfort
noise, gain control, fax/modem detection, T.38-ish switching, or impedance/level
settings.  G.711 is necessary, but it is not always sufficient if the access box
is still doing voice processing around it.

-- 
TheLastSysop <thelastsysop@dev.null>
"I survived the great rm -rf / rehearsal and all I got was this .signature."

[toc] | [prev] | [next] | [standalone]


#87375

From"Carlos E.R." <robin_listas@es.invalid>
Date2026-06-02 18:30 +0200
Message-ID<d2d3fmxbht.ln2@Telcontar.valinor>
In reply to#87372
On 2026-06-02 18:15, InterLinked wrote:
> On 6/2/2026 4:28 AM, Carlos E.R. wrote:
>> On 2026-06-02 01:12, InterLinked wrote:
>>> On 6/1/2026 9:40 AM, Rich wrote:
>>>> InterLinked <usenet@phreaknet.org> wrote:
>>>>> though for some reason I can only negotiate 33.6k.
>>>>
>>>> 33.6 is as high as you can negioate using digital to audio and audio to
>>>> digital signal transmission (i.e., standard "modem" working) due to the
>>>> underlying digitizing rate for all phone calls by the carriers.
>>>  >
>>>>> so something about the fiber arrangement seems to be interfering with
>>>>> V.90/V.92 negotiation.)
>>>>
>>>> Obtaining speeds higher than 33.6 requires:
>>>> 1) copper between the modem and the dmarc in the exchange
>>>> 2) the dmark in the switch being one that can have the analog to
>>>> digital converter at the end of the copper turned off.
>>>>
>>>> The higher speeds work by both ends driving the copper as if it were a
>>>> digital baseband network link (i.e., somewhat akin to driving ethernet
>>>> signaling over the line).
>>>>
>>>> But, with any analog to digital converters in between mean you can't
>>>> get better than 33.6.  And all the "fiber to your home, with a little
>>>> box that drives your in house copper as if it were still connected to
>>>> POTS" means there is a small analog to digital converter in the way
>>>> (and no one decided to offer the ability to switch it off and drive the
>>>> copper as digital baseband).
>>>
>>> Yes, I'm aware of the 33.6 ceiling with conversions.
>>>
>>> I don't think I mentioned it before, but I can get 36000 (not 33600) 
>>> when calling certain modems. I've gotten it a few times when calling 
>>> the dial-up ISP here in the US (there is really only one, no matter 
>>> which reseller you use), but usually just 33600.
>>>
>>> That demonstrates I can get speeds > 33.6k, but usually the 
>>> negotiation fails (I can hear it too, it's not happy trying to 
>>> negotiate V.90/V.92).
>>>
>>> My point was that copper POTS customers can get speeds in the 40s/50s 
>>> calling the same service, no problem at all, but I'm not able to do 
>>> that with my service being delivered over fiber. Dial-up Internet 
>>> speeds are actually *hampered* by fiber... how ironic is that?
>>
>> Yes. The signal was digitized at your exchange, then transmitted to 
>> the remote exchange. which had a bank of signal processors that would 
>> process the digital signal instead of a modem, and get you that V90.
>>
>> I worked for a telco that did precisely this (using the 5ESSS and the 
>> Lucent MAX TNT) around year 2000.
>>
>> With fibre and VoIP you have a problem: you are probably using a 
>> codec. Maybe a lossy one.
> 
> No, it's G.711 ulaw, as it should be, same as TDM.

Then you have another problem that I forgot: timing.

In traditional phone system, circuit switched, the timing was guaranteed 
and exact. With VoIP, the timing when each package arrive varies. The 
receiver would have to store and later rebuild the sequence with the 
exact timing. And I don't know what the return route timings would do to 
this, would not be synced.

> 
> I can dial up at 33.6k and it will stay up for hours. Quality of the 
> connection itself is not the issue. I think there is some "audio" part 
> of the V.92 handshake that is getting tripped up by the ONT or something 
> like that.
> 
>>> So from my (consumer) perspective, fiber is a loser. It's inferior 
>>> quality and connectivity and it doesn't work in a power outage. 
>>> There's already coax in my area for CATV so the fiber was redundant 
>>> to begin with for broadband. They crippled our phone service in favor 
>>> of another expensive[1] and unregulated service... but it's great for 
>>> the telco! Now the burden - and cost - of powering phone service is 
>>> on the consumer.
>>
>> Well, if you want to use dial up modem, you are using the wrong 
>> technology.
> 
> I don't have a choice, there's no copper here, I am forced to use fiber.

If you have fibre, you should already have a data connection.

-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

[toc] | [prev] | [next] | [standalone]


#87378

FromThe Natural Philosopher <tnp@invalid.invalid>
Date2026-06-02 18:29 +0100
Message-ID<10vn3u5$33fsr$2@dont-email.me>
In reply to#87375
On 02/06/2026 17:30, Carlos E.R. wrote:
>> I don't have a choice, there's no copper here, I am forced to use fiber.
> 
> If you have fibre, you should already have a data connection.

Ah, That socialist/fascist 'should'

He patently doesn't have it. Live with it.


-- 
Karl Marx said religion is the opium of the people.
But Marxism is the crack cocaine.

[toc] | [prev] | [next] | [standalone]


#87388

FromInterLinked <usenet@phreaknet.org>
Date2026-06-02 16:49 -0400
Message-ID<10vnflg$3733e$1@dont-email.me>
In reply to#87375
On 6/2/2026 12:30 PM, Carlos E.R. wrote:
> If you have fibre, you should already have a data connection.

Nope. I only get phone service from Verizon. Not interested in their 
overpriced Internet service that I didn't ask for. Ostensibly, I would 
also have to get unregulated FiOS Digital Voice and lose my regulated 
service. I care about the phone service, I do not care much about the 
Internet service. If they still had copper, I would probably have the 
POTS + DSL bundle, but since they replaced it with fiber, they've lost 
me as an Internet customer.

Besides, there is also cable Internet in this area, which is much 
cheaper, about $22/month amortized if you use the Seasonal Plan. No 
reason I'd want fiber Internet which costs more than double that.

[toc] | [prev] | [next] | [standalone]


#87422

From"Carlos E.R." <robin_listas@es.invalid>
Date2026-06-03 12:18 +0200
Message-ID<nkb5fmxcl.ln2@Telcontar.valinor>
In reply to#87388
On 2026-06-02 22:49, InterLinked wrote:
> On 6/2/2026 12:30 PM, Carlos E.R. wrote:
>> If you have fibre, you should already have a data connection.
> 
> Nope. I only get phone service from Verizon. Not interested in their 
> overpriced Internet service that I didn't ask for. Ostensibly, I would 
> also have to get unregulated FiOS Digital Voice and lose my regulated 
> service. I care about the phone service, I do not care much about the 
> Internet service. If they still had copper, I would probably have the 
> POTS + DSL bundle, but since they replaced it with fiber, they've lost 
> me as an Internet customer.

Ok, so you do not have access to the fibre data connection, but it is there.

> 
> Besides, there is also cable Internet in this area, which is much 
> cheaper, about $22/month amortized if you use the Seasonal Plan. No 
> reason I'd want fiber Internet which costs more than double that.


-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

[toc] | [prev] | [next] | [standalone]


#87368

FromMarco Moock <mm@dorfdsl.de>
Date2026-06-02 17:38 +0200
Message-ID<10vmtdr$6c5k$1@solani.org>
In reply to#87350
Am 02.06.26 um 01:12 schrieb InterLinked:
> On 6/1/2026 9:40 AM, Rich wrote:
>> InterLinked <usenet@phreaknet.org> wrote:
>>> though for some reason I can only negotiate 33.6k.
>>
>> 33.6 is as high as you can negioate using digital to audio and audio to
>> digital signal transmission (i.e., standard "modem" working) due to the
>> underlying digitizing rate for all phone calls by the carriers.
>  >
>>> so something about the fiber arrangement seems to be interfering with
>>> V.90/V.92 negotiation.)
>>
>> Obtaining speeds higher than 33.6 requires:
>> 1) copper between the modem and the dmarc in the exchange
>> 2) the dmark in the switch being one that can have the analog to
>> digital converter at the end of the copper turned off.
>>
>> The higher speeds work by both ends driving the copper as if it were a
>> digital baseband network link (i.e., somewhat akin to driving ethernet
>> signaling over the line).
>>
>> But, with any analog to digital converters in between mean you can't
>> get better than 33.6.  And all the "fiber to your home, with a little
>> box that drives your in house copper as if it were still connected to
>> POTS" means there is a small analog to digital converter in the way
>> (and no one decided to offer the ability to switch it off and drive the
>> copper as digital baseband).
> 
> Yes, I'm aware of the 33.6 ceiling with conversions.
> 
> I don't think I mentioned it before, but I can get 36000 (not 33600) 
> when calling certain modems. I've gotten it a few times when calling the 
> dial-up ISP here in the US (there is really only one, no matter which 
> reseller you use), but usually just 33600.
> 
> That demonstrates I can get speeds > 33.6k, but usually the negotiation 
> fails (I can hear it too, it's not happy trying to negotiate V.90/V.92).
> 
> My point was that copper POTS customers can get speeds in the 40s/50s 
> calling the same service, no problem at all, but I'm not able to do that 
> with my service being delivered over fiber. Dial-up Internet speeds are 
> actually *hampered* by fiber... how ironic is that?

This is because the analog signal is being converter to a digital signal 
by an analog to digital converter - it does not interpret the digital 
data signal. With ISDN, this was't that faulty, as ISDN is 
line-switched. IP is packet-switched, so jitter is there and relevant.
The VoIP phone signal is also transferred between different carriers, 
which means there might be codec conversions.

TLDR: V.90 is intended for analog lines, not for any digital service.

> So from my (consumer) perspective, fiber is a loser. It's inferior 
> quality and connectivity and it doesn't work in a power outage. There's 
> already coax in my area for CATV so the fiber was redundant to begin 
> with for broadband. They crippled our phone service in favor of another 
> expensive[1] and unregulated service... but it's great for the telco! 
> Now the burden - and cost - of powering phone service is on the consumer.

Analog dialup internet is a dead thing. It already was when ISDN came 
out - although usage was still possible.

Nowadays analog dialup is almost useless. Even if you could use it 
nowadays, the speed is so low, no normal website can be opened in a 
reasonable time, you will most likely get timeouts.
That means the amount of people who will use it is very low and that 
means the providers will stop providing it. Some still provide it, but 
they won't invest in it.
If their devices fail, they will stop providing the service.

The ISDN support was removed from Linux, dunno about Windows. Device 
drivers for various ISDN devices were last supported on XP...

This will mean it will be harder for telcos to provide dialup internet - 
even if they want.

Satellite based internet will thrive away the last users, as this is 
much faster.

-- 
Gruß
Marco

Spam bitte an abfalleimer2001@stinkedores.dorfdsl.de

[toc] | [prev] | [next] | [standalone]


#87369

FromTheLastSysop <thelastsysop@dev.null>
Date2026-06-02 15:48 +0000
Message-ID<fe5f3db28ed1804b61a3@dev.null>
In reply to#87368
>On Tue, 2 Jun 2026 17:38:35 +0200, Marco Moock <mm@dorfdsl.de> wrote:
>Am 02.06.26 um 01:12 schrieb InterLinked:
>> On 6/1/2026 9:40 AM, Rich wrote:
>>> InterLinked <usenet@phreaknet.org> wrote:
>>>> though for some reason I can only negotiate 33.6k.
>>>
>>> 33.6 is as high as you can negioate using digital to audio and audio to
>>> digital signal transmission (i.e., standard "modem" working) due to the
>>> underlying digitizing rate for all phone calls by the carriers.
>>  >
>>>> so something about the fiber arrangement seems to be interfering with
>>>> V.90/V.92 negotiation.)
>>>
>>> Obtaining speeds higher than 33.6 requires:
>>> 1) copper between the modem and the dmarc in the exchange
>>> 2) the dmark in the switch being one that can have the analog to
>>> digital converter at the end of the copper turned off.
>>>
>>> The higher speeds work by both ends driving the copper as if it were a
>>> digital baseband network link (i.e., somewhat akin to driving ethernet
>>> signaling over the line).
>>>
>>> But, with any analog to digital converters in between mean you can't
>>> get better than 33.6.  And all the "fiber to your home, with a little
>>> box that drives your in house copper as if it were still connected to
>>> POTS" means there is a small analog to digital converter in the way
>>> (and no one decided to offer the ability to switch it off and drive the
>>> copper as digital baseband).
>>
>> Yes, I'm aware of the 33.6 ceiling with conversions.
>>
>> I don't think I mentioned it before, but I can get 36000 (not 33600)
>> when calling certain modems. I've gotten it a few times when calling the
>> dial-up ISP here in the US (there is really only one, no matter which
>> reseller you use), but usually just 33600.
>>
>> That demonstrates I can get speeds > 33.6k, but usually the negotiation
>> fails (I can hear it too, it's not happy trying to negotiate V.90/V.92).
>>
>> My point was that copper POTS customers can get speeds in the 40s/50s
>> calling the same service, no problem at all, but I'm not able to do that
>> with my service being delivered over fiber. Dial-up Internet speeds are
>> actually *hampered* by fiber... how ironic is that?
>
>This is because the analog signal is being converter to a digital signal
>by an analog to digital converter - it does not interpret the digital
>data signal. With ISDN, this was't that faulty, as ISDN is
>line-switched. IP is packet-switched, so jitter is there and relevant.
>The VoIP phone signal is also transferred between different carriers,
>which means there might be codec conversions.
>
>TLDR: V.90 is intended for analog lines, not for any digital service.
>
>> So from my (consumer) perspective, fiber is a loser. It's inferior
>> quality and connectivity and it doesn't work in a power outage. There's
>> already coax in my area for CATV so the fiber was redundant to begin
>> with for broadband. They crippled our phone service in favor of another
>> expensive[1] and unregulated service... but it's great for the telco!
>> Now the burden - and cost - of powering phone service is on the consumer.
>
>Analog dialup internet is a dead thing. It already was when ISDN came
>out - although usage was still possible.
>
>Nowadays analog dialup is almost useless. Even if you could use it
>nowadays, the speed is so low, no normal website can be opened in a
>reasonable time, you will most likely get timeouts.
>That means the amount of people who will use it is very low and that
>means the providers will stop providing it. Some still provide it, but
>they won't invest in it.
>If their devices fail, they will stop providing the service.
>
>The ISDN support was removed from Linux, dunno about Windows. Device
>drivers for various ISDN devices were last supported on XP...
>
>This will mean it will be harder for telcos to provide dialup internet -
>even if they want.
>
>Satellite based internet will thrive away the last users, as this is
>much faster.

For redundancy, I would treat analog dialup over a fibre/VoIP terminal as a
best-effort curiosity, not as the backup path.

A practical setup is usually:

* put the ONT/router/phone ATA on a UPS and actually time how long it runs;
* keep a small LTE/5G router or phone-tethering path tested and documented;
* if dialup still matters, test the exact modem, number, and carrier path you
intend to use, because codec/ATA/carrier changes can break it without notice.

The important part is not what the service is called, but whether it survives
the failure you care about.  A copper pair with central-office battery was good
at that; a fibre ONT in the house is only as good as its local power and the
provider's outside plant.

-- 
TheLastSysop <thelastsysop@dev.null>
"I survived the great rm -rf / rehearsal and all I got was this .signature."

[toc] | [prev] | [next] | [standalone]


#87409

Fromc186282 <c186282@nnada.net>
Date2026-06-03 00:39 -0400
Message-ID<bYycnQomOdRMMoL3nZ2dnZfqnPednZ2d@giganews.com>
In reply to#87369
On 6/2/26 11:48, TheLastSysop wrote:
>> On Tue, 2 Jun 2026 17:38:35 +0200, Marco Moock <mm@dorfdsl.de> wrote:
>> Am 02.06.26 um 01:12 schrieb InterLinked:
>>> On 6/1/2026 9:40 AM, Rich wrote:
>>>> InterLinked <usenet@phreaknet.org> wrote:
>>>>> though for some reason I can only negotiate 33.6k.
>>>>
>>>> 33.6 is as high as you can negioate using digital to audio and audio to
>>>> digital signal transmission (i.e., standard "modem" working) due to the
>>>> underlying digitizing rate for all phone calls by the carriers.
>>>   >
>>>>> so something about the fiber arrangement seems to be interfering with
>>>>> V.90/V.92 negotiation.)
>>>>
>>>> Obtaining speeds higher than 33.6 requires:
>>>> 1) copper between the modem and the dmarc in the exchange
>>>> 2) the dmark in the switch being one that can have the analog to
>>>> digital converter at the end of the copper turned off.
>>>>
>>>> The higher speeds work by both ends driving the copper as if it were a
>>>> digital baseband network link (i.e., somewhat akin to driving ethernet
>>>> signaling over the line).
>>>>
>>>> But, with any analog to digital converters in between mean you can't
>>>> get better than 33.6.  And all the "fiber to your home, with a little
>>>> box that drives your in house copper as if it were still connected to
>>>> POTS" means there is a small analog to digital converter in the way
>>>> (and no one decided to offer the ability to switch it off and drive the
>>>> copper as digital baseband).
>>>
>>> Yes, I'm aware of the 33.6 ceiling with conversions.
>>>
>>> I don't think I mentioned it before, but I can get 36000 (not 33600)
>>> when calling certain modems. I've gotten it a few times when calling the
>>> dial-up ISP here in the US (there is really only one, no matter which
>>> reseller you use), but usually just 33600.
>>>
>>> That demonstrates I can get speeds > 33.6k, but usually the negotiation
>>> fails (I can hear it too, it's not happy trying to negotiate V.90/V.92).
>>>
>>> My point was that copper POTS customers can get speeds in the 40s/50s
>>> calling the same service, no problem at all, but I'm not able to do that
>>> with my service being delivered over fiber. Dial-up Internet speeds are
>>> actually *hampered* by fiber... how ironic is that?
>>
>> This is because the analog signal is being converter to a digital signal
>> by an analog to digital converter - it does not interpret the digital
>> data signal. With ISDN, this was't that faulty, as ISDN is
>> line-switched. IP is packet-switched, so jitter is there and relevant.
>> The VoIP phone signal is also transferred between different carriers,
>> which means there might be codec conversions.
>>
>> TLDR: V.90 is intended for analog lines, not for any digital service.
>>
>>> So from my (consumer) perspective, fiber is a loser. It's inferior
>>> quality and connectivity and it doesn't work in a power outage. There's
>>> already coax in my area for CATV so the fiber was redundant to begin
>>> with for broadband. They crippled our phone service in favor of another
>>> expensive[1] and unregulated service... but it's great for the telco!
>>> Now the burden - and cost - of powering phone service is on the consumer.
>>
>> Analog dialup internet is a dead thing. It already was when ISDN came
>> out - although usage was still possible.
>>
>> Nowadays analog dialup is almost useless. Even if you could use it
>> nowadays, the speed is so low, no normal website can be opened in a
>> reasonable time, you will most likely get timeouts.
>> That means the amount of people who will use it is very low and that
>> means the providers will stop providing it. Some still provide it, but
>> they won't invest in it.
>> If their devices fail, they will stop providing the service.
>>
>> The ISDN support was removed from Linux, dunno about Windows. Device
>> drivers for various ISDN devices were last supported on XP...
>>
>> This will mean it will be harder for telcos to provide dialup internet -
>> even if they want.
>>
>> Satellite based internet will thrive away the last users, as this is
>> much faster.
> 
> For redundancy, I would treat analog dialup over a fibre/VoIP terminal as a
> best-effort curiosity, not as the backup path.


   Well ... for MOST it'd work OK.


> A practical setup is usually:
> 
> * put the ONT/router/phone ATA on a UPS and actually time how long it runs;
> * keep a small LTE/5G router or phone-tethering path tested and documented;
> * if dialup still matters, test the exact modem, number, and carrier path you
> intend to use, because codec/ATA/carrier changes can break it without notice.

   Complicated !!!

> The important part is not what the service is called, but whether it survives
> the failure you care about.  A copper pair with central-office battery was good
> at that; a fibre ONT in the house is only as good as its local power and the
> provider's outside plant.

   As said somewhere, 'security' kind of depends on how 'juicy'
   a TARGET you are. Unless you're a Biggie "They" won't waste
   much CPU on your stuff.

   Serial/network-to-Whatever ... always speed/functional/security
   compromises. No really getting around it. I always trended to
   'simple-but-pretty-functional'. "Simple" means "less things that
   can go wrong".

   Alas connections, even local mounts, CAN die unexpectedly.
   The only 'fix' is to TEST those between blocks of xfers.
   Wrote a general aux backup pgm, on a PI in a 2nd building
   in case of disaster, local mounts DID have a finite chance
   of disappearing. PI, HD, rubber-banded together and stuck
   in an obscure corner - worked for many years. It'd do its
   thing in the day, working off the 'real' backups done the
   night before by my big backup pgm. Just the Really Important
   stuff like Payroll and Office files and DB. The PI wasn't
   exactly "quick", but it had all day to work on it. Fire or
   tornado or earthquake or Alien Invasion, the "second building"
   paradigm added solid redundancy for cheap. The files IT
   backed up were already encrypted, so even curious (and I
   don't think any had the skills) couldn't read them if they
   stole the PIs disk (actual MAG disk, PI3 COULD power ONE).

   Again, the 'redundancy' theme. Wanna survive, DO it.
   Anyone tells you different - IDIOTS !

[toc] | [prev] | [next] | [standalone]


#87370

From"Carlos E.R." <robin_listas@es.invalid>
Date2026-06-02 17:55 +0200
Message-ID<71b3fmxhhh.ln2@Telcontar.valinor>
In reply to#87368
On 2026-06-02 17:38, Marco Moock wrote:
> Am 02.06.26 um 01:12 schrieb InterLinked:
>> On 6/1/2026 9:40 AM, Rich wrote:



>> My point was that copper POTS customers can get speeds in the 40s/50s 
>> calling the same service, no problem at all, but I'm not able to do 
>> that with my service being delivered over fiber. Dial-up Internet 
>> speeds are actually *hampered* by fiber... how ironic is that?
> 
> This is because the analog signal is being converter to a digital signal 
> by an analog to digital converter - it does not interpret the digital 
> data signal. With ISDN, this was't that faulty, as ISDN is line- 
> switched. IP is packet-switched, so jitter is there and relevant.
> The VoIP phone signal is also transferred between different carriers, 
> which means there might be codec conversions.
> 
> TLDR: V.90 is intended for analog lines, not for any digital service.

Huh, no, not fully correct.

V.90 assumes the analog signal from the phone is converted to digital on 
the spot, at the client's exchange.




-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

[toc] | [prev] | [next] | [standalone]


#87371

FromTheLastSysop <thelastsysop@dev.null>
Date2026-06-02 16:03 +0000
Message-ID<f5c151e204a788607173@dev.null>
In reply to#87370
>On Tue, 2 Jun 2026 17:55:51 +0200, "Carlos E.R." <robin_listas@es.invalid>
>wrote:
>On 2026-06-02 17:38, Marco Moock wrote:
>> Am 02.06.26 um 01:12 schrieb InterLinked:
>>> On 6/1/2026 9:40 AM, Rich wrote:
>
>
>
>>> My point was that copper POTS customers can get speeds in the 40s/50s
>>> calling the same service, no problem at all, but I'm not able to do
>>> that with my service being delivered over fiber. Dial-up Internet
>>> speeds are actually *hampered* by fiber... how ironic is that?
>>
>> This is because the analog signal is being converter to a digital signal
>> by an analog to digital converter - it does not interpret the digital
>> data signal. With ISDN, this was't that faulty, as ISDN is line-
>> switched. IP is packet-switched, so jitter is there and relevant.
>> The VoIP phone signal is also transferred between different carriers,
>> which means there might be codec conversions.
>>
>> TLDR: V.90 is intended for analog lines, not for any digital service.
>
>Huh, no, not fully correct.
>
>V.90 assumes the analog signal from the phone is converted to digital on
>the spot, at the client's exchange.

Right. The useful distinction is not "copper vs fiber" by itself, but whether
the modem path is the old PSTN/PCM path V.90 was designed around. V.90
downstream assumes a digital server-side modem and a mostly-digital phone
network with one final D/A conversion near the subscriber loop.

Once the analog modem signal is created by an ATA/ONT and then packetised as
VoIP, all the boring voice-service details start to matter: codec, jitter
buffer, packet loss concealment, echo cancellation, VAD, transcoding, and
clocking. Even if the access medium is fiber, the modem no longer sees the same
sort of path.

Practical things I would check, if someone actually needs dialup to work over
such a line:

* force G.711/u-law or A-law only, with no compression;
* disable VAD/silence suppression and echo cancellation if the gear allows it;
* give the ATA/ONT traffic decent QoS and avoid WiFi in that path;
* try limiting the modem to V.34/33.6 rather than chasing V.90 speeds.

If that still does not hold, the annoying answer is that the line is fine for
voice but not a transparent modem circuit.

-- 
TheLastSysop <thelastsysop@dev.null>
"I survived the great rm -rf / rehearsal and all I got was this .signature."

[toc] | [prev] | [next] | [standalone]


#87374

FromInterLinked <usenet@phreaknet.org>
Date2026-06-02 12:22 -0400
Message-ID<10vn00o$32aon$1@dont-email.me>
In reply to#87371
On 6/2/2026 12:03 PM, TheLastSysop wrote:
>> On Tue, 2 Jun 2026 17:55:51 +0200, "Carlos E.R." <robin_listas@es.invalid>
>> wrote:
>> On 2026-06-02 17:38, Marco Moock wrote:
>>> Am 02.06.26 um 01:12 schrieb InterLinked:
>>>> On 6/1/2026 9:40 AM, Rich wrote:
>>
>>
>>
>>>> My point was that copper POTS customers can get speeds in the 40s/50s
>>>> calling the same service, no problem at all, but I'm not able to do
>>>> that with my service being delivered over fiber. Dial-up Internet
>>>> speeds are actually *hampered* by fiber... how ironic is that?
>>>
>>> This is because the analog signal is being converter to a digital signal
>>> by an analog to digital converter - it does not interpret the digital
>>> data signal. With ISDN, this was't that faulty, as ISDN is line-
>>> switched. IP is packet-switched, so jitter is there and relevant.
>>> The VoIP phone signal is also transferred between different carriers,
>>> which means there might be codec conversions.
>>>
>>> TLDR: V.90 is intended for analog lines, not for any digital service.
>>
>> Huh, no, not fully correct.
>>
>> V.90 assumes the analog signal from the phone is converted to digital on
>> the spot, at the client's exchange.
> 
> Right. The useful distinction is not "copper vs fiber" by itself, but whether
> the modem path is the old PSTN/PCM path V.90 was designed around. V.90
> downstream assumes a digital server-side modem and a mostly-digital phone
> network with one final D/A conversion near the subscriber loop.
> 
> Once the analog modem signal is created by an ATA/ONT and then packetised as
> VoIP, all the boring voice-service details start to matter: codec, jitter
> buffer, packet loss concealment, echo cancellation, VAD, transcoding, and
> clocking. Even if the access medium is fiber, the modem no longer sees the same
> sort of path.
> 
> Practical things I would check, if someone actually needs dialup to work over
> such a line:
> 
> * force G.711/u-law or A-law only, with no compression;
> * disable VAD/silence suppression and echo cancellation if the gear allows it;
> * give the ATA/ONT traffic decent QoS and avoid WiFi in that path;
> * try limiting the modem to V.34/33.6 rather than chasing V.90 speeds.
> 
> If that still does not hold, the annoying answer is that the line is fine for
> voice but not a transparent modem circuit.

Everyone here seems to be missing the point or did not fully read what I 
said earlier.

I have regulated "POTS over fiber" service and it uses private 
facilities. There is no other traffic on the fiber, it's just voice. I 
can get perfect connections at 33.6k that stay up forever and do not 
drop. Also very good connections with low speeds (300 baud) that 
normally see lots of corruption over VoIP.

Jitter and latency are not the issues here.
The codec is not the issue here (it's G.711 ulaw, as it should be). 
There is no compression.
The voice quality is excellent and basically identical to TDM. I have no 
qualms with the quality of my service in general. I just dislike that 
there's no common battery as with copper, and a few other things.

All of these things would be problems with "over the top" VoIP, this is 
not over the top VoIP, it is actually engineered very well. Over the top 
VoIP, you would never get 33.6k connections that stay up forever, or 
long 300 baud modem sessions with no corruption.

I suspect (but have not confirmed) that the ONT is doing something weird 
with V.90 handshakes. It could be as simple as DTMF false detection for 
a signal in the handshake that screws up the V.92 negotiation and causes 
it to fallback to 33.6 - except I know the ONT is configured for inband 
from other stuff I have analyzed with telco techs in the past, so I 
don't think that's it exactly... but maybe you get the idea.

If I had the ability to swap out the ONT or further debug it for issues, 
I'm sure I could make it work, unfortunately I don't have that kind of 
access.

[toc] | [prev] | [next] | [standalone]


#87376

FromTheLastSysop <thelastsysop@dev.null>
Date2026-06-02 16:36 +0000
Message-ID<a261568aa0a0bd9b6287@dev.null>
In reply to#87374
>On Tue, 2 Jun 2026 12:22:46 -0400, InterLinked <usenet@phreaknet.org> wrote:
>On 6/2/2026 12:03 PM, TheLastSysop wrote:
>>> On Tue, 2 Jun 2026 17:55:51 +0200, "Carlos E.R." <robin_listas@es.invalid>
>>> wrote:
>>> On 2026-06-02 17:38, Marco Moock wrote:
>>>> Am 02.06.26 um 01:12 schrieb InterLinked:
>>>>> On 6/1/2026 9:40 AM, Rich wrote:
>>>
>>>
>>>
>>>>> My point was that copper POTS customers can get speeds in the 40s/50s
>>>>> calling the same service, no problem at all, but I'm not able to do
>>>>> that with my service being delivered over fiber. Dial-up Internet
>>>>> speeds are actually *hampered* by fiber... how ironic is that?
>>>>
>>>> This is because the analog signal is being converter to a digital signal
>>>> by an analog to digital converter - it does not interpret the digital
>>>> data signal. With ISDN, this was't that faulty, as ISDN is line-
>>>> switched. IP is packet-switched, so jitter is there and relevant.
>>>> The VoIP phone signal is also transferred between different carriers,
>>>> which means there might be codec conversions.
>>>>
>>>> TLDR: V.90 is intended for analog lines, not for any digital service.
>>>
>>> Huh, no, not fully correct.
>>>
>>> V.90 assumes the analog signal from the phone is converted to digital on
>>> the spot, at the client's exchange.
>>
>> Right. The useful distinction is not "copper vs fiber" by itself, but whether
>> the modem path is the old PSTN/PCM path V.90 was designed around. V.90
>> downstream assumes a digital server-side modem and a mostly-digital phone
>> network with one final D/A conversion near the subscriber loop.
>>
>> Once the analog modem signal is created by an ATA/ONT and then packetised as
>> VoIP, all the boring voice-service details start to matter: codec, jitter
>> buffer, packet loss concealment, echo cancellation, VAD, transcoding, and
>> clocking. Even if the access medium is fiber, the modem no longer sees the
>> same
>> sort of path.
>>
>> Practical things I would check, if someone actually needs dialup to work over
>> such a line:
>>
>> * force G.711/u-law or A-law only, with no compression;
>> * disable VAD/silence suppression and echo cancellation if the gear allows
>> it;
>> * give the ATA/ONT traffic decent QoS and avoid WiFi in that path;
>> * try limiting the modem to V.34/33.6 rather than chasing V.90 speeds.
>>
>> If that still does not hold, the annoying answer is that the line is fine for
>> voice but not a transparent modem circuit.
>
>Everyone here seems to be missing the point or did not fully read what I
>said earlier.
>
>I have regulated "POTS over fiber" service and it uses private
>facilities. There is no other traffic on the fiber, it's just voice. I
>can get perfect connections at 33.6k that stay up forever and do not
>drop. Also very good connections with low speeds (300 baud) that
>normally see lots of corruption over VoIP.
>
>Jitter and latency are not the issues here.
>The codec is not the issue here (it's G.711 ulaw, as it should be).
>There is no compression.
>The voice quality is excellent and basically identical to TDM. I have no
>qualms with the quality of my service in general. I just dislike that
>there's no common battery as with copper, and a few other things.
>
>All of these things would be problems with "over the top" VoIP, this is
>not over the top VoIP, it is actually engineered very well. Over the top
>VoIP, you would never get 33.6k connections that stay up forever, or
>long 300 baud modem sessions with no corruption.
>
>I suspect (but have not confirmed) that the ONT is doing something weird
>with V.90 handshakes. It could be as simple as DTMF false detection for
>a signal in the handshake that screws up the V.92 negotiation and causes
>it to fallback to 33.6 - except I know the ONT is configured for inband
>from other stuff I have analyzed with telco techs in the past, so I
>don't think that's it exactly... but maybe you get the idea.
>
>If I had the ability to swap out the ONT or further debug it for issues,
>I'm sure I could make it work, unfortunately I don't have that kind of
>access.

Fair enough; if 33.6 is rock solid and low-speed data is clean, then I would
stop treating it as generic bad VoIP and look specifically at the modem-relay
and line-card behaviour in the ONT/softswitch path.

A useful first split would be to make the modem less ambitious and see exactly
which mode breaks:

* disable V.92 and try V.90 only;
* disable V.90/V.92 and force V.34;
* try with/without V.42/LAPM and compression, just to separate carrier
training from higher-layer negotiation;
* if your modem can report it, log the final modulation, symbol rate, retrains,
BLER, and disconnect reason.

If V.34 is boringly stable but V.90/V.92 fails or falls back differently with
small option changes, that points away from packet jitter and toward some
feature in the access voice equipment: echo canceller, tone detector, gain plan,
clock slip, DTMF/CNG/CED detection, or a vendor's idea of "modem passthrough".

Unfortunately the fix, if that is the case, is probably on the provider side: a
different ONT profile, different voice-port firmware, or a real copper/PCM path.
From the customer side you may only be able to gather enough evidence to make
the ticket land somewhere past first-level support.

-- 
TheLastSysop <thelastsysop@dev.null>
"I survived the great rm -rf / rehearsal and all I got was this .signature."

[toc] | [prev] | [next] | [standalone]


#87377

From"Carlos E.R." <robin_listas@es.invalid>
Date2026-06-02 18:39 +0200
Message-ID<gjd3fmx7p2.ln2@Telcontar.valinor>
In reply to#87371
On 2026-06-02 18:03, TheLastSysop wrote:
>> On Tue, 2 Jun 2026 17:55:51 +0200, "Carlos E.R." <robin_listas@es.invalid>
>> wrote:
>> On 2026-06-02 17:38, Marco Moock wrote:
>>> Am 02.06.26 um 01:12 schrieb InterLinked:
>>>> On 6/1/2026 9:40 AM, Rich wrote:
>>
>>
>>
>>>> My point was that copper POTS customers can get speeds in the 40s/50s
>>>> calling the same service, no problem at all, but I'm not able to do
>>>> that with my service being delivered over fiber. Dial-up Internet
>>>> speeds are actually *hampered* by fiber... how ironic is that?
>>>
>>> This is because the analog signal is being converter to a digital signal
>>> by an analog to digital converter - it does not interpret the digital
>>> data signal. With ISDN, this was't that faulty, as ISDN is line-
>>> switched. IP is packet-switched, so jitter is there and relevant.
>>> The VoIP phone signal is also transferred between different carriers,
>>> which means there might be codec conversions.
>>>
>>> TLDR: V.90 is intended for analog lines, not for any digital service.
>>
>> Huh, no, not fully correct.
>>
>> V.90 assumes the analog signal from the phone is converted to digital on
>> the spot, at the client's exchange.
> 
> Right. The useful distinction is not "copper vs fiber" by itself, but whether
> the modem path is the old PSTN/PCM path V.90 was designed around. V.90
> downstream assumes a digital server-side modem and a mostly-digital phone
> network with one final D/A conversion near the subscriber loop.

Side thinking: it amazes me, at the speed these technologies evolved, 
the many protocol changes from 1990 to 2010 that needed many equipment 
changes at the exchanges, if they were getting revenue, profits.

At year 2000, we were here installing V90 hardware. A few years later, 
we were deploying ADSL. And next, removing it all and installing fibre 
instead.

I have 1 Gbit up/dn... not so long ago, 56K seemed amazing.

> 
> Once the analog modem signal is created by an ATA/ONT and then packetised as
> VoIP, all the boring voice-service details start to matter: codec, jitter
> buffer, packet loss concealment, echo cancellation, VAD, transcoding, and
> clocking. Even if the access medium is fiber, the modem no longer sees the same
> sort of path.
> 
> Practical things I would check, if someone actually needs dialup to work over
> such a line:
> 
> * force G.711/u-law or A-law only, with no compression;
> * disable VAD/silence suppression and echo cancellation if the gear allows it;
> * give the ATA/ONT traffic decent QoS and avoid WiFi in that path;
> * try limiting the modem to V.34/33.6 rather than chasing V.90 speeds.
> 
> If that still does not hold, the annoying answer is that the line is fine for
> voice but not a transparent modem circuit.

Right.


-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

[toc] | [prev] | [next] | [standalone]


#87410

Fromc186282 <c186282@nnada.net>
Date2026-06-03 00:48 -0400
Message-ID<bYycnQUmOdS6L4L3nZ2dnZfqnPednZ2d@giganews.com>
In reply to#87371
On 6/2/26 12:03, TheLastSysop wrote:
>> On Tue, 2 Jun 2026 17:55:51 +0200, "Carlos E.R." <robin_listas@es.invalid>
>> wrote:
>> On 2026-06-02 17:38, Marco Moock wrote:
>>> Am 02.06.26 um 01:12 schrieb InterLinked:
>>>> On 6/1/2026 9:40 AM, Rich wrote:
>>
>>
>>
>>>> My point was that copper POTS customers can get speeds in the 40s/50s
>>>> calling the same service, no problem at all, but I'm not able to do
>>>> that with my service being delivered over fiber. Dial-up Internet
>>>> speeds are actually *hampered* by fiber... how ironic is that?
>>>
>>> This is because the analog signal is being converter to a digital signal
>>> by an analog to digital converter - it does not interpret the digital
>>> data signal. With ISDN, this was't that faulty, as ISDN is line-
>>> switched. IP is packet-switched, so jitter is there and relevant.
>>> The VoIP phone signal is also transferred between different carriers,
>>> which means there might be codec conversions.
>>>
>>> TLDR: V.90 is intended for analog lines, not for any digital service.
>>
>> Huh, no, not fully correct.
>>
>> V.90 assumes the analog signal from the phone is converted to digital on
>> the spot, at the client's exchange.
> 
> Right. The useful distinction is not "copper vs fiber" by itself, but whether
> the modem path is the old PSTN/PCM path V.90 was designed around. V.90
> downstream assumes a digital server-side modem and a mostly-digital phone
> network with one final D/A conversion near the subscriber loop.
> 
> Once the analog modem signal is created by an ATA/ONT and then packetised as
> VoIP, all the boring voice-service details start to matter: codec, jitter
> buffer, packet loss concealment, echo cancellation, VAD, transcoding, and
> clocking. Even if the access medium is fiber, the modem no longer sees the same
> sort of path.
> 
> Practical things I would check, if someone actually needs dialup to work over
> such a line:
> 
> * force G.711/u-law or A-law only, with no compression;
> * disable VAD/silence suppression and echo cancellation if the gear allows it;
> * give the ATA/ONT traffic decent QoS and avoid WiFi in that path;
> * try limiting the modem to V.34/33.6 rather than chasing V.90 speeds.
> 
> If that still does not hold, the annoying answer is that the line is fine for
> voice but not a transparent modem circuit.

   "VOIP" really WAS a big prob in the Old Days.
   DID look into writing a VOIP app for our local
   PBX system.

   "Latency" could be severe, disqualifying.

   And the connecting entity, might NOT understand
   your carefully-chosen codec.

   It's All Better Now ... at the expense of 1000
   times more CPU/code ........

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#87248

Fromrbowman <bowman@montana.com>
Date2026-05-29 01:21 +0000
Message-ID<n7s80tFo1qlU7@mid.individual.net>
In reply to#87244
On Thu, 28 May 2026 20:34:37 -0400, c186282 wrote:

> On 5/28/26 04:20, The Natural Philosopher wrote:
>> On 28/05/2026 08:52, c186282 wrote:
>>> On 5/27/26 09:10, The Natural Philosopher wrote:
>>>> On 27/05/2026 03:39, c186282 wrote:
>>>>> Soon the fiber/repeaters will degrade and they'll
>>>>>    have fired all the humans who knew how to deal with it.
>>>>
>>>> Hardly. Fibre does not degrade. Not like copper
>>>
>>>    The fiber doesn't ... but fiber requires splitters/repeaters.
>>>    THOSE will degrade.
>>>    HUMANS will be required to replace that stuff. Humans are a pain
>>>    in the ass and expensive.
>>>
>> Again,. no, not really. You don send humans under the oceans to fix
>> cables And fibre junctions are where human access is by definition
>> possible And fixing fibre connections is not rocket science
> 
> 
>    Fixing copper is even easier - and it's already there.

We're in the middle of a thunderstorm which reminds me of a telco tech 
crouched under his little tent trying to hook a a multitude of wires while 
his little workspace fill with water...

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#87264

Fromc186282 <c186282@nnada.net>
Date2026-05-29 02:08 -0400
Message-ID<UYicnc-FJtzBsIT3nZ2dnZfqnPQAAAAA@giganews.com>
In reply to#87248
On 5/28/26 21:21, rbowman wrote:
> On Thu, 28 May 2026 20:34:37 -0400, c186282 wrote:
> 
>> On 5/28/26 04:20, The Natural Philosopher wrote:
>>> On 28/05/2026 08:52, c186282 wrote:
>>>> On 5/27/26 09:10, The Natural Philosopher wrote:
>>>>> On 27/05/2026 03:39, c186282 wrote:
>>>>>> Soon the fiber/repeaters will degrade and they'll
>>>>>>     have fired all the humans who knew how to deal with it.
>>>>>
>>>>> Hardly. Fibre does not degrade. Not like copper
>>>>
>>>>     The fiber doesn't ... but fiber requires splitters/repeaters.
>>>>     THOSE will degrade.
>>>>     HUMANS will be required to replace that stuff. Humans are a pain
>>>>     in the ass and expensive.
>>>>
>>> Again,. no, not really. You don send humans under the oceans to fix
>>> cables And fibre junctions are where human access is by definition
>>> possible And fixing fibre connections is not rocket science
>>
>>
>>     Fixing copper is even easier - and it's already there.
> 
> We're in the middle of a thunderstorm which reminds me of a telco tech
> crouched under his little tent trying to hook a a multitude of wires while
> his little workspace fill with water...


   Sounds "courageous", "dedicated" - a hero figure.

   Long years back I kinda of WAS that person.

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