[Freeswitch-users] IAX2 DTMF -> SIP RTP not reliable

[Anthony Minessale]

Just to warn you we do not use mod_iax all that much.  It was used as a tool to test the core of FreeSWITCH in the early stages of development and we just kinda left it hanging around since it does at least work.  We had to add a bunch of code to the stock iaxclient lib to make it threadsafe etc because the lib is designed to handle 1 or 2 calls and we are using it in a b2bua type env where hundreds of concurrent calls may be possible.  That said, since we more or less forked the code to avoid generating support issues for the other soft-phones that use iaxclient, you may want to check if there were any bugs in the real version of the library that match your issue.
 
http://sourceforge.net/projects/iaxclient


We've had little to no demand for IAX2 so we have not focused very much on it. We do have strategies for creating a more robust and perhaps even an "improved" implementation of the IAX2 protocol. Alas, it's pretty much purely an academic exercise because there is little reason to implement it.






 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/

AIM: anthm
MSN:anthony_minessale at hotmail.com
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FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
iax:guest at conference.freeswitch.org/888
googletalk:conf+888 at conference.freeswitch.org
pstn:213-799-1400


----- Original Message ----
From: Birgit Arkesteijn <birgit at westhawk.co.uk>
To: Freeswitch-users at lists.freeswitch.org
Sent: Monday, March 10, 2008 10:52:40 AM
Subject: [Freeswitch-users] IAX2 DTMF -> SIP RTP not reliable

Hi,

We're running FreeSWITCH svn Trunk 7697 on SuSE Linux 9.3 (x86-64).

I'm experiencing problems with DTMF:
The IAX2 DTMF frames aren't always transferred into RTP packets.
Sometimes none of the frames are translated, sometimes only the first 
one is omitted. All the IAX2 DTMF packets are ack-ed.

Our setup:
PhoneFromHere.com applet (IAX2 protocol)
-> FreeSWITCH (ns2.westhawk.co.uk)
-> SIP to SystemX (sofia/default/123 at 66.212.134.192)


I searched on jira.freeswitch.org for a bug that could explain this, but 
failed, so I submitted this as a bug, see
http://jira.freeswitch.org/browse/FSCORE-109

Has anyone else experienced the same or a similar problem?

Thanks, Birgit

-- 
-- Birgit Arkesteijn, birgit at westhawk.co.uk,
-- Westhawk Ltd, Albion Wharf, 19 Albion Street, Manchester M1 5LN, UK
-- Company no: 1769350
-- Registered Office:
-- 15 London Road, Stockton Heath, Warrington WA4 6SJ. UK.
-- tel.: +44 (0)161 237 0660
-- <URL: http://www.westhawk.co.uk>

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