[asterisk-dev] How to change call transfer message flow with Asterisk?

Ding Peng roc.dingpeng at gmail.com
Fri Feb 22 08:32:18 CST 2013

Hi, everybody,


I want to implement the supplementary service, call transfer
unconditional/busy/NoAnswer through SIP in Asterisk. 

The call transfer feature is successful, but I found the message flow is
different with what I needed(there is no backward 181). 

The 181 message isn't found as below picture.

Does asterisk also already support 181? 




Ding Peng

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