AudioCodes Mediant 800B User Manual page 856

Parameter
Web/EMS: TGRP Routing
Precedence
CLI: tgrp-routing-prec
[TGRProutingPrecedence]
CLI: use-dtg
User's Manual
context=dsn.mil@example.com

For ISDN-to-IP calls:
- The device interworks ISDN Setup with an Off Hook Indicator
of "Voice" to SIP INVITE with "tgrp=hotline;trunk-
context=dsn.mil" in the Contact header.
- The device interworks ISDN Setup with an Off Hook indicator
of "Data" to SIP INVITE with "tgrp=hotline-ccdata;trunk-
context=dsn.mil" in the Contact header.
- If ISDN Setup does not contain an Off Hook Indicator IE and
the Bearer Capability IE contains "Unrestricted 64k", the
outgoing INVITE 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.

[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].)

The device interworks ISDN Setup with an Off Hook Indicator
of "Voice" to SIP INVITE Request-URI and Contact header with
"tgrp=hotline;trunk-context=dsn.mil".

The device interworks ISDN Setup with an Off Hook indicator of
"Data" to SIP INVITE Request-URI and Contact header with
"tgrp=hotline-ccdata;trunk-context=dsn.mil".

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.
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.
Determines whether the device uses the 'dtg' parameter for routing IP-
856
Mediant 800B Gateway and E-SBC
Description
Document #: LTRT-10620