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Event ID: 1079 Source: MSExchangeUnifiedMessaging

The VoIP platform encountered an exception Microsoft.SpeechServer.Core.InvalidMediaException: The SDP media description received from the remote SIP peer is null. during the call with ID "D7E28746-37E311DE-8F0DF36A-3F831FB9@". 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.
This event may contain different type of errors that are encountered by the VoIP, so the troubleshooting approach should consider this:
- The SDP media description received from the remote SIP peer is null
- The requested DTMF payload type (101) has been refused by the remote end

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