[Freeswitch-users] RFC 2833 payload type mismatch issue on bridged call

[Anthony Minessale]

https://freeswitch.org/jira


On Thursday, June 9, 2016, Dave Horton <daveh at beachdognet.com> wrote:

> I have a client sending an INVITE to FS with RFC 2833 offered as payload
> type 96.  My freeswitch device profile has "rfc2833-pt" set to 101 and
> "inbound-late-negotiation” set to true.
>
> The FS then bridges this call to a gateway, sending an INVITE offering pt
> 101 for 2833.
> The 200 OK on the B leg comes back (with pt 101), and FS then sends a 200
> OK to the original INVITE with pt 101.
> So, to summarize, the client has offered 101 for 2833 and the FS responds
> with an SDP with 96.
> At that point, DTMF does not work (DTMF generated by the client not
> recognized by the far end gateway).
>
> Is there a configuration setting that would tell FS to use the RDC 2833
> payload type from the A leg when bridging a call?
>
> Interestingly, I am only seeing this problem on servers I have upgraded
> (to  1.6.8) — older servers do bridge the B leg offering pt 96 if that came
> in on the A leg.
> (Note, though, that the older servers are also not configured to do
> inbound-late-negotiation).
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-- 
Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬

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