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Why does music play on calls made through a Session Initiation Protocol (SIP) trunk, even after the phone is answered?

April 26, 2017answered initiation Music phone play Protocol session SIP trunk

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Why does music play on calls made through a Session Initiation Protocol (SIP) trunk, even after the phone is answered?

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A. To avoid having the music played, check the following: a. Select the Media Termination Point (MTP) Required checkbox. b. Verify that the device pool includes the Media Resource Group List (MRGL) name. MRGL has the Media Resource Group (MRG) configured, and MRG has the Media Termination Point (MTP) selected from the available media resources. c. If you are using the hairpin method to configure Mobile Voice Access, check MTP in the H323 Gateway configuration in Cisco Unified CallManager.