[cisco-voip] DTMF payload (101)

[Jeff Mottishaw]

We have had Exchange Unified Messaging up and running for 7 months
with 120 users in two locations. Suddenly yesterday with no
configuration changes to our gateway/callmanager/exchange environment
all of our calls started to be dropped.

I can contact my own voicemail, dial directly into someone else's
voicemail or be idiverted into someone's voicemail. I can't transfer
an internal or an external caller and external callers are
disconnected the instant that the transfer to voicemail happens.

Every time someone is disconnected this warning is in the event log.
Please help!

Event Type:	Warning
Event Source:	MSExchange Unified Messaging
Event Category:	UMCore
Event ID:	1079
Date:		7/17/2008
Time:		9:03:46 AM
User:		N/A
Computer:	NAV-MX2
Description:
The VoIP platform encountered an exception
Microsoft.SpeechServer.SpeechApplicationException: The requested DTMF
payload type (101) has been refused by the remote end. --->
System.ArgumentException: The requested DTMF payload type (101) has
been refused by the remote end.
   at Microsoft.SpeechServer.Core.SpeechSession.OpenAsync(MediaDescription
mediaDescription, IPAddress localAddress, Boolean useSecureRtp,
MediaRelayAuthenticationData mrasData, Boolean receiveRTAudio)
   at Microsoft.SpeechServer.Core.TelephonySessionInbound.OpenSpeechSessionAsyncForSdplessInvite()
   --- End of inner exception stack trace --- during the call with ID
"ed163580-87f16d60-21c5-30a020a at 10.2.10.3". This exception occurred at
the Microsoft Exchange Speech Engine VoIP platform during an
event-based asynchronous operation submitted by the Unified Messaging
server. The Unified Messaging server will attempt to recover from this
exception. If this warning occurs frequently, contact Microsoft
Product Support.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.