I have been having this same issue for weeks with  sipxecs 4.4 and Polycom 330, 
335, 560 and 670's.  I have been working with polycom on the issue as it might 
be a polycom issue.  What polycom is saying this the the phones are not sending 
the ACK after the MOH thus breaking the whole chain.  I have gone back in 
firmware to the earliest supported for each device as well as the newest 3.2.5 
SIP and 4.3.0 ROM.  Polycom has even got me to customize a config for 3.3.1f 
SIP software.  Same issue.  I also have been working with Cisco on this issue 
as it was first noticed in my environment on inbound/outbound only.  But now 
the issue seems to be between polycoms also.

For me, I can only put people on hold once and then resume.  After that, I 
can't put them on hold again, transfer, conference or anything else.   I have 
225 phones doing this.  I don't know if this was an issue in 4.2.1.

The one thing I do see in SipX is the codec error in the as soon as I hit the 
hold and later come the sipxproxy.log errors.  See below.  I have set the 
system to g711u, g722 with the same results.  The SDP looks like they are 
correct.  Codec's are not conflicting.

My environment is a cisco 2811 gateway to PRI and two SipXecs servers all with 
polycom phones.

Are there more having this issue with Polycom?

This is from the freeswitch log.


2011-04-14 14:03:33.608713 [ERR] sofia.c:5135 Codec Error! v=0
o=- 1302815009 1302815010 IN IP4 10.1.128.18
s=Polycom IP Phone
c=IN IP4 10.1.128.18
t=0 0
a=sendonly
m=audio 0 RTP/AVP 9 101
a=rtpmap:9 G722/8000
a=rtpmap:101 telephone-event/8000


I would see these in the sipxproxy.log file


"2011-04-07T19:39:00.095535Z":3278:SIP:ERR:pbx01.uws.edu:SipUserAgent-2:41EBB940:SipXProxy:"SipUserAgent::handleMessage
 SIP message timeout expired with no matching transaction"

"2011-04-07T19:39:00.102472Z":3280:NAT:WARNING:pbx01.uws.edu:SipRouter-15:41FBC940:SipXProxy:"'ytXjrZaKNyQjp':
 Received unexpected event UpdateRequest while in state 'WaitingForInvite'"

"2011-04-07T19:39:17.401042Z":3358:SIP:WARNING:pbx01.uws.edu:SipClientUdp-12:40F82940:SipXProxy:"SipTransaction::handleChildIncoming
 duplicate 2xx response received on UAC for INVITE with no ACK"

--
Paul Curtis


From: "Matthew Kitchin (public/usenet)" 
<mkitchin.pub...@gmail.com<mailto:mkitchin.pub...@gmail.com>>
Reply-To: Discussion list for users of sipXecs software 
<sipx-users@list.sipfoundry.org<mailto:sipx-users@list.sipfoundry.org>>
Date: Wed, 20 Apr 2011 16:13:34 -0500
To: <sipx-users@list.sipfoundry.org<mailto:sipx-users@list.sipfoundry.org>>
Subject: Re: [sipx-users] issue with calls on hold with Polycom 335

What codecs (and order of preference) are you using?
What version of Sipx?

On 4/20/2011 4:02 PM, Paul Stulac wrote:
I am currently testing sipx with just three phones, 1 polycom soundpoint IP 335 
and 2 Bria softphones.   With the polycom every time I put a call on hold and 
press the resume softkey I can’t get connected back to the call; the phone 
display says “connecting….” and I have to disconnect the call.   With the bria 
softphones I can put calls on hold and resume them without issue.  Any ideas 
where I should start looking?

Thanks,
Paul




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