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12.7 SIP Responses
12.7.1 486(busy here), 503(Service unavailable): When Device are
busying, you can select 486 or 505 to response to SIP.
12.7.2 180 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 Voice-Mail directly. (For this function, 183 must be turn
on)
12.7.3 183(Session Progress)-->[It means"on progressing"] : When you
turn 183 on, it means you can hear voicemail while GMS side are
busying. We recommend you to turn this on if you use SIP Proxy.
VoIPon www.voipon.co.uk [email protected] Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
