No subject

600
I'm subscribed to a "buddy" on my Polycom phone. Periodically I'd get this
error: 'Incoming call: Got SIP response 500 "Internal Server Error" back
from 10.1.1.200'.

Additional Description

We have six(6) Polycom 601 attenendant consoles monitoring roughly
forty(40) Polycom 430 phones each for a total of one hundred (100) or so
watchers/hints.

To reproduce the behaviour you need only interrupt chan_sip via reload, or
an Asterisk restart.  Once this has been done, presence notifications sent
to the phones will no longer take place properly.  It is unclear as to
whether this problem is due to the Asterisk system not sending the right
messages, or the Polycom not responding properly to a properly formatted
message.  But, after a while, the phones will start sending messages back
in response to messages from Asterisk that say "Internal Server Error". 
One thing is for certain.  After the channel is interrupted, by reload or
restart, presence no longer works.
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Relationships       ID      Summary
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related to          0005164 "Presence" subscription cause...
has duplicate       0011118 Polycom Phones & Hints
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 oej - 11-05-07 15:38  
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pedantic=no makes your asterisk sip channel really bad and doesn't help
anything. Bad advice.

When you restart or reload asterisk all subscriptions go away. The phones
will have to re-subscribe. In some cases, we tell the phones that they have
to resubscribe since you changed your dialplan. The next time the phone
subscribes, usually within an hour, things start to work properly again.

As always (and required by the bug guidelines) I need to see a SIP debug
of this. A single error message doesn't say anything really. Fun to look
at, but doesn't help me understanding what's going on. 

Issue History 
Date Modified   Username       Field                    Change               
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11-05-07 15:38  oej            Note Added: 0073151                          
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