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Cisco Bug: CSCum85381 - CUBE : SIP-SIP : 183 (without SDP) causes CUBE to drop DTMF OOB Notify

Last Modified

Apr 24, 2020

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

CUBE drops Method Notify (OOB Notify DTMF) in SIP to SIP call flows, when 183 Session Progress without SDP is received just after 183 Session Progress with SDP.

For Example:

CUCM --> SIP --> CUBE ---> ITSP

When Cube receives 183 Session (with SDP) from ITSP, it sends out Method Notify back to CUCM.
ITSP sends another 183 Session (without SDP), at this point, CUBE strips out NOTIFY towards CUCM. This causes CUCM to disable DTMF on this call.

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Bug Details Include

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