[Freeswitch-users] Call Dropping with SIP 503 status

[Troy Anderson]

We are experiencing an odd issue.  We have many calls that don't drop, but some do after being up a minute or two.  

The reason code is NORMAL_TEMPORARY_FAILURE and the sip status that is triggering that is 503 (Service Unavailable).  With only one or two calls up at a time, I don't think it's a session limit issue (set to 1000).

Here is the console log from just before the 503 status - any help is greatly appreciated!

2010-01-27 12:49:11.879251 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [calling][0]
2010-01-27 12:49:11.899334 [INFO] sofia.c:597 Update Callee ID to "400" <400>
2010-01-27 12:49:11.919018 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [ready][200]
2010-01-27 12:49:11.919018 [DEBUG] sofia.c:4011 Duplicate SDP
v=0
o=- 1264621687 1264621687 IN IP4 192.168.0.46
s=Polycom IP Phone
c=IN IP4 192.168.0.46
t=0 0
a=sendrecv
m=audio 2222 RTP/AVP 0 8 18 127
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:127 telephone-event/8000

2010-01-27 12:50:06.068999 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [calling][0]
2010-01-27 12:50:06.108877 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [ready][200]
2010-01-27 12:50:06.108877 [DEBUG] sofia.c:4011 Duplicate SDP
v=0
o=- 1264621687 1264621687 IN IP4 192.168.0.46
s=Polycom IP Phone
c=IN IP4 192.168.0.46
t=0 0
a=sendrecv
m=audio 2222 RTP/AVP 0 8 18 127
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:127 telephone-event/8000

2010-01-27 12:51:05.259614 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [calling][0]
2010-01-27 12:51:05.298972 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [ready][200]
2010-01-27 12:51:05.298972 [DEBUG] sofia.c:4011 Duplicate SDP
v=0
o=- 1264621687 1264621687 IN IP4 192.168.0.46
s=Polycom IP Phone
c=IN IP4 192.168.0.46
t=0 0
a=sendrecv
m=audio 2222 RTP/AVP 0 8 18 127
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:127 telephone-event/8000

2010-01-27 12:52:05.369138 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [calling][0]
2010-01-27 12:52:05.399251 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [ready][200]
2010-01-27 12:52:05.399251 [DEBUG] sofia.c:4011 Duplicate SDP
v=0
o=- 1264621687 1264621687 IN IP4 192.168.0.46
s=Polycom IP Phone
c=IN IP4 192.168.0.46
t=0 0
a=sendrecv
m=audio 2222 RTP/AVP 0 8 18 127
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:127 telephone-event/8000

2010-01-27 12:53:09.599069 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [calling][0]
2010-01-27 12:53:09.599069 [DEBUG] sofia.c:4003 Channel sofia/internal/400 at 192.168.0.31 entering state [terminating][503]
2010-01-27 12:53:09.599069 [NOTICE] sofia.c:4647 Hangup sofia/internal/400 at 192.168.0.31 [CS_EXECUTE] [NORMAL_TEMPORARY_FAILURE]
2010-01-27 12:53:09.599069 [DEBUG] switch_ivr_bridge.c:466 sofia/internal/400 at 192.168.0.31 ending bridge by request from write function