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Cisco Bug: CSCun91908 - MGCP controlled 5400 sends first RTP-NTE packet with wrong SSRC value

Last Modified

Apr 19, 2019

Products (1)

Known Affected Releases

15.1(4)M5.9

Description (partial)

Symptom:
Cisco AS5400 Voice Gateway is sending the first RTP-NTE packet with wrong SSRC (Synchronization source identifier) value. The remaining RTP-NTE packets for the same Digit and following digits contain correct SSRC valuse. Hence the IVR system is detecting the first digit twice.

Conditions:
When RTP-NTE is the DTMF method configured. Some rare cases (especially if the DTMF digit is the first RTP packet that is sent out in case of MGCP).
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