I was told the version of G.729 the Dialogic uses is not compatible with the version of G.729 the MS UM server uses and therefore there's no audio when you try to use G.729. Is this true? Does anyone else have G.729 working between the Microsoft UM server and the Dialogic gateways? Speaking about the 1008DNI, 1008LSW and 2060DTI gateways. If you have it working, did you do anything special? I would test this myself by simply changing the codec on the Dialogic box but It's getting a little too late in the day right now to start rebooting the gateway for testing.
Thanks
I found a gateway I could test. With the Dialogic set to G.729AB, you get this error in the Um server event log. When you call in, the UM server basically just drops the call. Is there any chance Dialogic offers more G.729 codecs that would be compatible with MS Unified Messaging? If not, we're stuck with either a high bandwidth codec (G.711) or the low bandwidth codec (G.723) that doesn't sound nearly as good. G.729 is a good compromise and we'd love to be able to use it if we can. We use it over the WAN in the phone system but we can't yet use it for Unified Messaging.
Event Type: Warning
Event Source: Microsoft Exchange Speech Engine
Event Category: Telephony Application Host
Event ID: 32768
Date: 5/22/2009
Time: 8:08:50 AM
User: N/A
Computer: (info removed)
Description:
The Telephony Manager declined a call with Call Id (info removed) for the following reason in component speech session: 'The speech session failed to open: No common audio formats found..'.
Well darn...maybe this is the answer and it means there's no chance to use 729 :(
http://technet.microsoft.com/en-us/library/aa998670.aspx?ppud=4
That says only 711 an 723 are available in Unified Messaging. Bummer.
Curious, when did Exchange UM start to support G.729?
I was under the impression that the only codecs it supported were RTAudio, G.723 and G.711.
Ray Cassick Senior Software Engineer Independent Health
See my previous post. I didn't realize that they didn't support 729...I was thinking they did but a different version. But according to their docs they don't. :(
Yeah, looks like we hit send almost at the same time :)
