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Cisco Bug: CSCui96696 - ES: G711 voice packets should have non-zero SSRCs

Last Modified

Sep 05, 2014

Products (1)

  • Cisco IPICS Server Software

Known Affected Releases

4.6(1)

Description (partial)

Symptom:
Currently when generating RTP voice packets on a p25 talk-group's multicast address, the ISSIG embeds an SSRC value of 0x00000000 in each. 

Instead, the ISSIG needs to put a non-zero value in the SSRC field. Also, this SSRC should be unique: if the ISSIG sees its own SSRC coming back, it should re-randomize its own SSRC value but wait a while before doing so, to accommodate possible erroneous looping of packets.

Conditions:
IPICS 4.6(1) or higher
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