Configuration Examples; Sip Call Flow; Figure 7-5: Sip Call Flow - AudioCodes MP-124 User Manual

7.12

7.12.1 SIP Call Flow

SIP User's Manual
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The parameter GWRegistrationName can be any string. This parameter is used only if
registration is Per Gateway. 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 Embedded Web Server), 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
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 gateway, or messages are sent per
channel according to the parameter AuthenticationMode. There is also an option to
configure registration mode per Trunk 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
gateway resends its registration request after 3600 x 70% = 2520 sec. The default value of
RegistrationTimeDivider is 50%.
If registration per channel is selected, on gateway startup the gateway 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.

Configuration Examples

The SIP call flow (shown in the following figure), describes SIP messages exchanged
between twogateways during a simple call. In this call flow example, gateway
(10.8.201.158) with phone number '6000' dials gateway (10.8.201.161) with phone number
'2000'.
'sipgatewayname' parameter

Figure 7-5: SIP Call Flow

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MediaPack Series
can be overwritten by
Document #: LTRT-65409
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