Hi, everybody,
I want to implement the supplementary service, call transfer unconditional/busy/NoAnswer through SIP in Asterisk. Does asterisk also already support it? What's the supported sip message flow? How should I configure the sip.conf or extensions.conf? I tried this way in extensions.conf, but there is no 181 message is sent to calling party, which is expected as below picture. exten => 1010,1,Dial(SIP/1001); CFU 1010-->1001. Thanks. Ding Peng
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