Acme Packet SD6300 7.2.0 Disconnects A Forked Call After RE-INVITE (Doc ID 2009548.1)

Last updated on MAY 19, 2015

Applies to:

Acme Packet 6300 - Version S-Cz7.0.2 to S-Cz7.2.5 [Release S-Cz7.0]
Information in this document applies to any platform.
Call drops when the call is answered by devices behind IMS forking server.

Symptoms

Call comes from PSTN on the Cisco gateway and the Cisco gateway sends the call to ACME SBC, which then sends the call to  a landline phone, if the phone is answered there is no issue.
However, if the call is not answered by the landline phone,  the call goes to  mobile phones via IMS forking server, using a parallel forking technique. When the call is answered on the mobile phone, the call is dropped.

The SBC will be shown to terminate BOTH call legs. 

Changes

Upgraded the SBC from SD4250 6.1.0 to SD6300 7.2.0

Cause

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