the Bearer Capability IE contains “Speech”, the INVITE in this
case does not contain tgrp and trunk-context parameters.
[4] Hotline Extended = Interworks the ISDN Setup message’s hotline
"OffHook Indicator" Information Element (IE) to SIP INVITE’s
Request-URI and Contact headers. (Note: For IP-to-ISDN calls, the
device handles the call as described in option [3].)
If ISDN Setup does not contain an Off Hook Indicator IE and the
Bearer Capability IE contains “Unrestricted 64k”, the outgoing
INVITE Request-URI and Contact header includes
“tgrp=ccdata;trunk-context=dsn.mil”. If the Bearer Capability IE
contains “Speech”, the INVITE in this case does not contain tgrp
and trunk-context parameters.
Note: IP-to-Tel configuration (using the PSTNPrefix parameter)
overrides the 'tgrp' parameter in incoming INVITE messages.
Web/EMS: TGRP Routing
Precedence
CLI: tgrp-routing-prec
[TGRProutingPrecedenc
e]
Determines the precedence method for routing IP-to-Tel calls -
according to the Inbound IP Routing Table or according to the SIP 'tgrp'
parameter.
[0] = (Default) IP-to-Tel routing is determined by the Inbound IP
Routing Table (PSTNPrefix parameter). If a matching rule is not
found in this table, the device uses the Trunk 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 Trunk Group number is not
defined, then the Inbound IP 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 Trunk 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.
CLI: use-dtg
[UseBroadsoftDTG]
Determines whether the device uses the 'dtg' parameter for routing IP-
to-Tel calls to a specific Trunk 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
Trunk 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).
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