[asterisk-users] SIP transfer from agent fails

[Damon Estep]

I have seen a couple of posts related to this, but no workaround.

 

Setup;

 

Asterisk 1.2.13 with Polycom IP501 phones

Caller is sent to the queue with the "t" option

Agent is logged in via AgentCallbackLogin on an extension that is in a
context that includes exclusively agent extensions.

Agent is set up with ackcall=yes (# to answer)

 

Call comes in, agent takes the call, attempts to transfer to another
extension using a SIP transfer on the Polycom phone. Call drops when
completing the transfer. The caller goes on hold as they should, the
second call is dialed and answers successfully, but the completion of
the transfer fails and the call is dropped. There is a "internal server
error 500" logged on the console from the phone of the agent the
originally answered the call.

 

This used to work in earlier versions, quit working some time around
1.2.10 I think.

 

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