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Re: About 5% of outgoing calls fail with one-way sound only - fix?

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Chris Green <cl@isbd.net> writes:

> Our VOIP is a straightforward (?) Yealink DECT system, a W70B base
> station and five W73H handsets.  It works well for most calls but a
> small percentage of outgoing calls fail with 'them' being able to hear
> 'us' but we can't hear them.
>
> These are always (so far) calls to businesses or local government,
> however it is just one or two that fail, most calls to banks etc. work
> perfectly OK.  It's consistent with any particular destination, if it
> doesn't work first time then it's never going to work.
>
> We're with Plexatalk whose 'support' (it's a one man band I think) has
> disappeared for the moment.
>
> Is there an 'obvious' fix for this? Is it something awry at Plaxatalk?
> Is it worth trying another VOIP provider (I'm tempted, given the lack
> of response at Plexatalk)?

I had a similar problem and I fixed it by switching on SIP ALG, which is
frowned upon. But it could be the same underlying problem of packets not
being routed back to the right address, because there is no stun server
perhaps.

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Thread

About 5% of outgoing calls fail with one-way sound only - fix? Chris Green <cl@isbd.net> - 2026-01-23 15:35 +0000
  Re: About 5% of outgoing calls fail with one-way sound only - fix? Richmond <dnomhcir@gmx.com> - 2026-01-23 15:51 +0000
    Re: About 5% of outgoing calls fail with one-way sound only - fix? Chris Green <cl@isbd.net> - 2026-01-23 17:51 +0000
      Re: About 5% of outgoing calls fail with one-way sound only - fix? Richmond <dnomhcir@gmx.com> - 2026-01-23 22:44 +0000
        Re: About 5% of outgoing calls fail with one-way sound only - fix? Chris Green <cl@isbd.net> - 2026-01-24 09:35 +0000
          Re: About 5% of outgoing calls fail with one-way sound only - fix? Richmond <dnomhcir@gmx.com> - 2026-01-24 10:44 +0000
            Re: About 5% of outgoing calls fail with one-way sound only - fix? David Higton <dave@davehigton.me.uk> - 2026-01-24 17:27 +0000
              Re: About 5% of outgoing calls fail with one-way sound only - fix? Richmond <dnomhcir@gmx.com> - 2026-01-24 17:31 +0000
            Re: About 5% of outgoing calls fail with one-way sound only - fix? David Woolley <david@ex.djwhome.demon.invalid> - 2026-01-25 12:58 +0000
          Re: About 5% of outgoing calls fail with one-way sound only - fix? Richmond <dnomhcir@gmx.com> - 2026-01-24 15:47 +0000
        Re: About 5% of outgoing calls fail with one-way sound only - fix? David Higton <dave@davehigton.me.uk> - 2026-01-24 17:23 +0000
          Re: About 5% of outgoing calls fail with one-way sound only - fix? Richmond <dnomhcir@gmx.com> - 2026-01-24 17:32 +0000
            Re: About 5% of outgoing calls fail with one-way sound only - fix? David Woolley <david@ex.djwhome.demon.invalid> - 2026-01-25 12:43 +0000
  Re: About 5% of outgoing calls fail with one-way sound only - fix? Andy Burns <usenet@andyburns.uk> - 2026-01-23 16:16 +0000
    Re: About 5% of outgoing calls fail with one-way sound only - fix? Chris Green <cl@isbd.net> - 2026-01-23 17:53 +0000
      Re: About 5% of outgoing calls fail with one-way sound only - fix? David Higton <dave@davehigton.me.uk> - 2026-01-23 22:31 +0000
        Re: About 5% of outgoing calls fail with one-way sound only - fix? Chris Green <cl@isbd.net> - 2026-01-24 09:39 +0000
          Re: About 5% of outgoing calls fail with one-way sound only - fix? David Higton <dave@davehigton.me.uk> - 2026-01-24 17:18 +0000
  Re: About 5% of outgoing calls fail with one-way sound only - fix? "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-01-23 17:02 +0000

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