MP-1xx SIP User’s Manual 8. Gateway Capabilities Description
Version 4.4 149 March 2005
8 Gateway Capabilities Description
8.1 Proxy or Registrar Registration Example
The REGISTER message is sent to the Registrar’s IP address (if configured) or to the Proxy’s IP
address. The message is sent per Gateway or per Gateway endpoint according to the
“AuthenticationMode” parameter. Usually the FXS Gateways are registered per Gateway port,
while FXO Gateways send a single registration message, where Username is used instead of
phone number in From/To headers. The registration request is resent according to the parameter
‘RegistrartionTimeDivider’. For example, if ‘RegistrationTimeDivider = 70’ (%) and Registration
Expires time = 3600, the gateway resends its registration request after 3600 x 70% = 2520 sec.
The default value of ‘RegistrartionTimeDivider’ is 50%.
REGISTER sip:servername SIP/2.0
VIA: SIP/2.0/UDP 212.179.22.229;branch=z9hG4bRaC7AU234
From: <sip:101@sipgatewayname>;tag=1c29347
To: <sip:101@sipgatewayname>
Call-ID: 10453@212.179.22.229
Seq: 1 REGISTER
Expires: 3600
Contact: sip:101@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 "sipgatewayname" parameter (defined in the ini file or set from the Web browser), 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.
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