AudioCodes Media Pack MP-112, User Manual

Page: 433 / 486

Version 5.8 433 September 2009
SIP User's Manual 9. IP Telephony Capabilities
9.16 Proxy or Registrar Registration Example
Below is an example of Proxy and Registrar Registration:
REGISTER sip:servername SIP/2.0
VIA: SIP/2.0/UDP 212.179.22.229;branch=z9hG4bRaC7AU234
From: <sip:GWRegistrationName@sipgatewayname>;tag=1c29347
To: <sip:GWRegistrationName@sipgatewayname>
Call-ID: 10453@212.179.22.229
Seq: 1 REGISTER
Expires: 3600
Contact: sip:GWRegistrationName@212.179.22.229
Content-Length: 0
The ‘servername’ string is defined according to the following rules:

The "servername" is equal to "RegistrarName" if configured. The "RegistrarName" can
be any string.

Otherwise, the "servername" is equal to "RegistrarIP" (either FQDN or numerical IP
address), if configured.

Otherwise, the "servername" is equal to "ProxyName" if configured. The "ProxyName"
can be any string.

Otherwise, the "servername" is equal to "ProxyIP" (either FQDN or numerical IP
address).
The parameter GWRegistrationName can be any string. This parameter is used only if
registration is per device. If the parameter is not defined, the parameter UserName is used
instead. If the registration is per endpoint, the endpoint phone number is used.
The 'sipgatewayname' parameter (defined in the ini file or Web interface) can be any string.
Some Proxy servers require that the 'sipgatewayname' (in REGISTER messages) is set
equal to the Registrar / Proxy IP address or to the Registrar / Proxy domain name. The
'sipgatewayname' parameter can be overwritten by the TrunkGroupSettings_GatewayName
value if the TrunkGroupSettings_RegistrationMode is set to 'Per Endpoint'.
REGISTER messages are sent to the Registrar's IP address (if configured) or to the Proxy's
IP address. A single message is sent once per device, or messages are sent per channel
according to the parameter AuthenticationMode. There is also an option to configure
registration mode per Hunt Group using the TrunkGroupSettings table. The registration
request is resent according to the parameter RegistrationTimeDivider. For example, if
RegistrationTimeDivider = 70 (%) and Registration Expires time = 3600, the device resends
its registration request after 3600 x 70% = 2520 sec. The default value of
RegistrationTimeDivider is 50%.
If registration per channel is selected, on device startup the device sends REGISTER
requests according to the maximum number of allowed SIP dialogs (configured by the
parameter NumberOfActiveDialogs). After each received response, the subsequent
REGISTER request is sent.