Asterisk Q&A

Q: 外線撥入後約 15 sec 會自動掛斷，且出現錯誤訊息:

[2012-02-29 16:41:42] WARNING[2713] chan_sip.c: Maximum retries exceeded on transmission 3c417d294417b1ff2139128123697520@sip2sip.info for seqno 103 (Critical Response) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
[2012-02-29 16:41:42] WARNING[2713] chan_sip.c: Hanging up call 3c417d294417b1ff2139128123697520@sip2sip.info - no reply to our critical packet (see https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions ).

A: