[Freeswitch-users] G.722 negotiation issue with AVM Fritzbox

[Roland Hänel]

Hello Brian,

As I wrote, I was already aware of that. However I think it would make
sense to improve the handling on the FS side because

   - the response of FS is clearly faulty, if FS doesn't like the FB offer
it could reject the call, but sending 200 OK with port 0 is incorrect.
Especially when the SDP data in debugging is not the same as the data we
see in the SIP packet

   - though incorrect, the G722/16000 thing is not uncommon. According to
some reports I googled Grandstream and others also misbehave in that way.
Because FS is friendly, I'd suggest to answer the request for G722/16000
with G722/8000 and everything will probably just work out fine. By the way,
the debugging output suggests that exactly this was the intent of the
author - but there seems to be a bug that prevents this SDP from making it
into the 200 OK packet.

Roland
Am 20.01.2012 17:37 schrieb "Brian West" <brian at freeswitch.org>:

> This would be because the AVM Fritzbox is broken.  Its not G722/16000 its
> G722/8000 (even tho its a 16k codec).
>
> On Jan 20, 2012, at 10:28 AM, Roland Hänel wrote:
>
> It seems that FreeSwitch cannot negotiate G.722 with an AVM Fritzbox device
> (*the* most popular VoIP box/router in Germany) because of what seems to be
> a concatenation of several bugs.
>
>
> --
> Brian West
> FreeSWITCH Solutions, LLC
> Phone: +1 (918) 420-9266
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> brian at freeswitch.org
> http://www.freeswitch.org
>
>
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