asterisk users - Aug 2009 - MWI

I have always been confused about how MWI is working with asterisk.  If a 
SIP device has the option to subscribe to MWI, should it?  I think 
asterisk sends NOTIFY messages to SIP clients if the sip peer entry has 
"mailbox=".  Is there any advantage then to leaving that out of the
sip
peer entry and having the device itself register for the messages?  Is it 
really one and the same thing?

Cheers,

j

Jeff LaCoursiere wrote:
> I have always been confused about how MWI is working with asterisk.  If a 
> SIP device has the option to subscribe to MWI, should it?  I think 
> asterisk sends NOTIFY messages to SIP clients if the sip peer entry has 
> "mailbox=".  Is there any advantage then to leaving that out of
the sip
> peer entry and having the device itself register for the messages?  Is it 
> really one and the same thing?
It's really one and the same thing.  NOTIFY messages can only be sent to 
UAs that have SUBSCRIBE'd to them.  Asterisk only accepts subscriptions 
to the MWI events if there is a mailbox entry in the SIP peer.

-- 
Alex Balashov
Evariste Systems
Web    : http://www.evaristesys.com/
Tel    : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
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