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Cisco Bug: CSCum97996 - CUCM sends "Send 181 Call Is Being Forwarded" even it is False

Last Modified

Feb 16, 2017

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)

CUCM sends SIP 181 on inbound call leg when call is being forwarded.
This may result in unexpected tones to be played at the caller.

CUCM Version : with following configuration
- SIP trunk with QSIG tunnelling enabled.
- CUCM service parameters
"Send 181 call is being forwarded" is set to False
"Delay Sending 181 until 180/183 message is received" is set to True

Call flow :
Inbound call on SIP trunk which is being forwarded.

With above configuration CUCM should never send out 181.
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  • Status
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