We have a Siemens Hi-Path 4000 phone system. We also have Cisco Unity 4.0(3) running. Now some Siemens phone users are checking their Voice Mails from Cisco Unity. We have a QSIG connection between the Cisco Gateway & Siemens Gateway.
What configutaions are required on both Siemens side & Cisco Unity end to enable MWI feature to work for Siemens phones? Presently, Siemens phone users can listen to their Voice Mails by dialing Unity, but they don't get MWI notification unlike phones registered to Call Manager. This is a very complex query & it will be great if someone can help me out or drop a few hints.
A PIMG would only be required if you can't get what you need across the QSIG trunk. Here's an example where it seems MWI worked without any need for PIMG...
But these app notes are intended to be examples, not requirements. Obviously if you're using different hardware or software, then your results may differ. I'm more of a Unity guy so I can't say much on how a different MGCP gateways would impact the flow.