Version 6.6
537
MP-11x & MP-124
User's Manual
44. Configuration Parameters Reference
Parameter
Description
is copied from the request.
Web: Use Tgrp
Information
EMS: Use SIP Tgrp
[UseSIPTgrp]
Determines whether the SIP 'tgrp' parameter is used. This SIP
parameter specifies the Hunt Group to which the call belongs
(according to RFC 4904). For example, the SIP message below
indicates that the call belongs to Hunt Group ID 1:
INVITE sip::+16305550100;tgrp=1;trunk-
[email protected];user=phone SIP/2.0
[0]
Disable = (Default) The 'tgrp' parameter isn't used.
[1]
Send Only = The Hunt Group number or name (configured in the
Hunt Group Settings) is added to the 'tgrp' parameter value in the
Contact header of outgoing SIP messages. If a Hunt Group number /
name is not associated with the call, the 'tgrp' parameter isn't
included. If a 'tgrp' value is specified in incoming messages, it is
ignored.
[2]
Send and Receive = The functionality of outgoing SIP messages
is identical to the functionality described for option
[1].
In addition, for
incoming SIP INVITEs, if the Request-URI includes a 'tgrp'
parameter, the device routes the call according to that value (if
possible). The Contact header in the outgoing SIP INVITE (Tel-to-IP
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 SIPGatewayName parameter.
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-
[email protected];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.
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