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11.7 SIP Responses
11.7.1 486(busy here), 503(Service unavailable):
When Device is busy, you can select 486 or 505 to response to SIP.
11.7.2 180 Ring on/off:
LAN TO MOBILE two stage dialing can be turn off, therefore there will be
no the Ring Back Tone, all the phone call will be transferred to prompt
voice directly. (For this function, 183 must be turn on)
11.7.3 183(Session Progress)
[It means "on progressing"]: When you turn 183 on, it means you can
hear the prompt voice while GSM side is busy We recommend you to
turn this on if you use SIP Proxy.
Dial Peer Configuration Table corresponding IP
(please read next page)
*** If you have dial peer server, Sip
server/Asterisk set GSM route,please set Dial
Peer server's IP**
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