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50 VoIP subscriber gateways
Reserved SIP proxy – addition reserved SIP-proxy addresses:
– Proxy address – network address of the reserved SIP-server;
– Registration server – to specify registration server you should set flag before the field and
enter a registration server address of a reserved proxy;
To add reserved SIP server, click ‘Add’ button. To delete it, click button opposite to server.
– Home server check – check availability of the main SIP server in the Homing mode;
– Check method – method selection to check availability of the main SIP server in the
‘Homing’ mode:
– Invite – transmission of INVITE request to its address when performing an
outgoing call;
– Register – periodic transmission of REGISTER messages to its address;
– Options – periodic transmission of OPTIONS messages to its address;
– Keepalive timeout (s)– periodic message transmission interval in seconds; used for
primary SIP server availability check;
– SIP domain – domain where the device is located (fill in if required);
– Use domain to register – use the domain during registration. In this case, domain will be
transmitted into Request URI of ‘REGISTER’ request;
– Outbound proxy – ‘Outbound’ mode:
– Disable – call will be routed according to the numbering schedule;
– Outbound – numbering schedule is required for outgoing communications, however, all
calls will be routed via SIP server; if there is no registration PBX response will be sent to
the subscriber in order to enable subscriber service management (VAS management);
– Outbound with busy – numbering schedule is required for outgoing communications;
however, all calls will be routed via SIP server; if there is no registration, VoIP will be
unavailable: error tone will be transmitted to the phone headset. ‘Outbound’ mode is
analogue to the device operation with dialing plan (x.);
– Registration renewal time period (Expires) – time for subscriber port registration on SIP server. At
the average, port registration renewal will be performed after 2/3 of the specified period;
– Registration Retry Interval – when the registration is unsuccessful, time period between SIP server
registration attempts;
– User call (SIP):
180 Ringing caller equipment will receive response 180; upon receiving this message,
caller equipment should send a local ringback tone into the line;
183 Progress (Early media) – caller equipment will receive response 183+SDP—used for
voice frequency path forwarding before the answer of the callee. In this case, TAU-8.IP
will send a ringback tone remotely to the caller;
– Use SIP Display info in Register – when checked, use username in 'SIP Display Info' field of the
'Register' message;
– Ringback at 183 Progress – when checked, 'ringback' tone will be sent upon receiving '183
Progress' message (w/o enclosed SDP);
– Use Alert-Info header – process INVITE request 'Alert-Info' header to send a non-standard ringing
to the subscriber port. Cadence for a non-standard ringing may be configured in the section
3.1.4.9;
– Remove rejected media – when option is enabled, passive media will be excepted from offer-SDP
against the RFC3264 advice. Enable the option for coordination with Iskratel equipment ;
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