[Asterisk-Dev] chan_sip cvs-stable post 1/1/2005 polycom bug

[Josh Roberson]

Tilghman Lesher wrote:

>On Saturday 15 January 2005 00:56, Greg Boehnlein wrote:
>  
>
>>Hello,
>>	I've opened a bug that is affecting Polycom phones. As far as I
>>can tell, the problem was introduced in chan_sip between 1/1/2005
>>and 1/2/2005, and appears in subsequent versions.
>>
>>http://bugs.digium.com/bug_view_page.php?bug_id=0003348
>>    
>>
>
>We noticed a problem like this as well.  The solution was to remove
>the mailbox subscription from the Polycom config xml file and just let
>Asterisk determine the mailbox subscription based upon sip.conf.  The
>problem was that apparently, the mailbox subscription tied up the
>line, making calls impossible.
>
>  
>
This is correct.   Myself and Brian West encountered a similar problem 
on the bugtracker just recently.  Asterisk does NOT support MWI via 
SUBSCRIBE, and since the polycom attempts to do this, it ties up the 
line on the polycom as Asterisk reports back a 405 from the server.  
Technically, this is not an asterisk problem, since we are not required 
to support MWI via subscribe.    If you remove the mailbox subscriptions 
from the polycom XML config, it will work like a champ.

--Josh