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Why does the call sometimes drop without any tone when making an enterprise dial tone call using Mobile Voice Access?

April 26, 2017Dial drop Enterprise mobile Tone Voice

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Why does the call sometimes drop without any tone when making an enterprise dial tone call using Mobile Voice Access?

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A. Most of the time when a wrong number is dialed, the user hears an announcement by Cisco Unified CallManager. In rare cases, if Cisco Unified CallManager plays a reorder tone, the call will drop without any tone. Also, if a call is made to a busy user and Cisco Unified CallManager cannot divert the call to voice mail or the user doesn’t have voice mail, a busy tone is played. The call will also drop if the System Remote Access Call Take Back Timer (default 120 seconds) on the System parameters page expires.