[Devel] Voicemail handling (message waiting indicator)

[Christian Schlatter]

Olle E Johansson wrote:
> 
> 26 jan 2007 kl. 16.36 skrev Christian Schlatter:
> 
>> Dimo,
>>
>> Could you list some example SIP UA products that do only accept MWI 
>> NOTIFYs with the caller-id from the initial registration?
>>
>> The endpoints I've seen so far do all accept so called unsolicited MWI 
>> NOTIFYs, so they don't care about the caller-id at all. Examples are 
>> Polycom, Snom, Cisco, or Linksys SIP phones.
>>
> 
> Either that or the callID from the SUBSCRIBE, but not the REGISTER.
> Asterisk supports both ways.
> 
> /O
> 

With the caveat that Asterisk only supports SUBSCRIBE MWI for endpoints 
registered at the Asterisk box. Since we use OpenSER as registrar and 
Asterisk for VM this limits us to using the non-standard unsolicited MWI 
solution. That works well so far, but, rather paradoxically, I just hope 
that the SIP phone vendors keep supporting this non-standard behavior.


Christian