[Freeswitch-users] codec negotiation error

[Piotr Gregor]

>
> m=audio 29188 RTP/AVP 0 101 8 3
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> === cut ===


> I think this is bad, as PCMA isn't listed in the codecs available.


Oops. You know what 8 in the m=audio line stands for Brian?
Yes, it is for PCMA.

How do I debug this?


You can start from checking if these packets are sent at all, and if you
get those packets at all.
Use wireshark or tcpdump.
Do the same on both machines, you will see if and where RTP is sent/recved.
If all RTP is sent but it cannot reach your FreeSWITCH, then check ports
are allowed in the firewall.

regards,




Piotr Gregor
Software Engineer

M: (+44) 07483 866 525     L: (+44) 01256 597 470     www: dataandsignal.com






On Wed, Aug 3, 2022 at 10:15 PM Brian May <brian at linuxpenguins.xyz> wrote:

> Brian May <brian at linuxpenguins.xyz> writes:
>
> > Never mind, I found
> > https://freeswitch.org/confluence/display/FREESWITCH/verbose_sdp
>
> Plus
>
> https://freeswitch-users.freeswitch.narkive.com/jyFwqoeR/incompatible-destination-did-fs-not-offer-a-codec
> --
> Brian May <brian at linuxpenguins.xyz>
> https://linuxpenguins.xyz/brian/
>
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