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Cisco Bug: CSCvi00852 - ATA190 Sending Invalid fax pass-through parameter in SDP "a=fax"

Last Modified

May 14, 2019

Products (1)

  • Cisco IP Phone 7800 Series

Known Affected Releases

1.2(2)

Description (partial)

Symptom:
Fax Pass-through switchover with ATA190 and IOS/IOS-XE CUBE/CME

Conditions:
Call flow(s):
ATA190---UCM--SIP--CUBE--SIP--Provider
ATA190---BE4000---SIP---Provider

This happens when the initial T38 negotiation is rejected with 488 and the ATA190 sends a REINVITE to negotiate fax passthrough g711.
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