Version 6.2 389 February 2011
SIP User's Manual 10. Configuration Parameters Reference
Parameter Description
call) contains “tgrp=<source trunk group ID>;trunk-
context=<gateway IP address>”. The <source trunk group ID> is the
Hunt Group ID where incoming calls from Tel is received. For IP-Tel
calls, the SIP 200 OK device's response contains “tgrp=<destination
trunk group ID>;trunk-context=<gateway IP address>”. The
<destination trunk group ID> is the Hunt Group ID used for outgoing
Tel calls. The <gateway IP address> in “trunk-context” can be
configured using the parameter SIPGatewayName.
Note: IP-to-Tel configuration (using the PSTNPrefix parameter)
overrides the 'tgrp' parameter in incoming INVITE messages.
Web/EMS: TGRP Routing
Precedence
[TGRProutingPrecedenc
e]
Determines the precedence method for routing IP-to-Tel calls -
according to the 'IP to Hunt Group Routing Table' or according to the
SIP 'tgrp' parameter.
[0] (default) = IP-to-Tel routing is determined by the 'IP to Hunt
Group Routing Table' (PSTNPrefix parameter). If a matching rule is
not found in this table, the device uses the Hunt Group parameters
for routing the call.
[1] = The device first places precedence on the 'tgrp' parameter for
IP-to-Tel routing. If the received INVITE Request-URI does not
contain the 'tgrp' parameter or if the Hunt Group number is not
defined, then the 'IP to Hunt Group Routing Table' is used for routing
the call.
Below is an example of an INVITE Request-URI with the 'tgrp'
parameter, indicating that the IP call should be routed to Hunt Group 7:
INVITE sip:200;tgrp=7;trunk-
context=example.com@10.33.2.68;user=phone SIP/2.0
Notes:
For enabling routing based on the 'tgrp' parameter, the UseSIPTgrp
parameter must be set to 2.
For IP-to-Tel routing based on the 'dtg' parameter (instead of the
'tgrp' parameter), use the parameter UseBroadsoftDTG.
[UseBroadsoftDTG]
Determines whether the device uses the 'dtg' parameter for routing IP-
to-Tel calls to a specific Hunt Group.
[0] Disable (default)
[1] Enable
When this parameter is enabled, if the Request-URI in the received SIP
INVITE includes the 'dtg' parameter, the device routes the call to the
Hunt Group according to its value. This parameter is used instead of the
'tgrp/trunk-context' parameters. The 'dtg' parameter appears in the
INVITE Request-URI (and in the To header).
For example, the received SIP message below routes the call to Hunt
Group ID 56:
INVITE sip:123456@192.168.1.2;dtg=56;user=phone SIP/2.0
Note: If the Hunt Group is not found based on the 'dtg' parameter, the
'IP to Hunt Group Routing Table' is used instead for routing the call to
the appropriate Hunt Group.
Web/EMS: Enable GRUU
[EnableGRUU]
Determines whether the Globally Routable User Agent URIs (GRUU)
mechanism is used, according to RFC 5627. This is used for obtaining a
GRUU from a registrar and for communicating a GRUU to a peer within
a dialog.
[0] Disable (default)
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