my sip trunk is working fine, I can make and receive pstn calls and I can dial *123 and pick up my voicemail. But my sip provider says I should see a text a message in the phone display when there are messages waiting for me and I don't see any notification on my 7940G phone. But if I use Xlite softphone on my PC it shows a little envelope icon so I know the sip service is working ok. How do I get my 7940G to notify me of waiting messages?
Can you take a trace on xlite to see how the ITSP sends MWI ? There are different options to configure in CME and at least one should know what they use. Probably it's unsolicited but a trace would help anyway.
Btw: Sip Firmware 8.11 is out since Feb 2009 so that may fix your issue...
I assume you are running Sip on your 7940..?
From another fourm:
Message Waiting Indication (MWI)
Message Waiting Indication works "out-of-the-box", which is quite remarkable given the fact that the Cisco phones are not compliant with the SIP RFCs in this area. The Cisco SIP phones do not send a SUBSRIBE request to sipX in order to subscribe to MWI notify events from the Media Server. Instead they expect an unsolicited NOTIFY when the message state changes. Let me be clear: This is not in accordance with the SIP RFCs.
They mention something about Option "101" so possibly playing with your SIP_MAC.cfg and changing it to:
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