[Asterisk-Dev] MWI From tag in SIP message

[Chris A. Icide]

Olle E. Johansson wrote:

>Kevin P. Fleming wrote:
>  
>
>>Olle E. Johansson wrote:
>>
>>    
>>
>>>I would say that the core problem is that we send NOTIFY messages
>>>WITHOUT a preceeding SUBSCRIBE for notifications, so there's no
>>>transaction to match. The NOTIFY has nothing to do with the actuall call
>>>to voicemail, but should be related to a subscription... Well, it works
>>>anyway with a lot of phones and ignoring it is ok and propably a correct
>>>way of handling it.
>>>      
>>>
>>Agreed, although we will need to always continue to support the 'push'
>>method of MWI as well, since most phones do seem to support it properly.
>>    
>>
>
>Agreed. Most of these phones do not subscribe anyway, so there would be
>no way to notify them without breaking the standard. Think they also
>missed this part of the RFCs :-)
>
>What we need to do, and it's on my to-fix-list for chan_sip, is to make
>sure that phones that actually do subscribe get NOTIFY messages with a
>reference to the SUBSCRIBE (Call-ID) and that we expire the subscriptions.
>
>/O
>  
>
Thanks guys, I wrote a quick patch to prevent a tag from being attached 
to a MWI NOTIFY that solved my problem in my specific case. 

-Chris
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-dev/attachments/20050719/a3694d30/attachment.htm