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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 file - 02-13-08 17:59  
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I have spent a few hours today looking at possible solutions for this and
almost have one completed. Please stay tuned. 

Issue History 
Date Modified   Username       Field                    Change               
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02-13-08 17:59  file           Note Added: 0082208                          
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