AudioCodes Mediant 3000 User Manual page 307

SIP User's Manual
Parameter
Web: Use Tgrp Information
EMS: Use SIP Tgrp
[UseSIPTgrp]
Web/EMS: Enable GRUU
[EnableGRUU]
Version 5.8
Determines whether the SIP 'tgrp' parameter is used, which specifies
the Trunk Group to which the call belongs, according to RFC 4904.
For example:
INVITE sip::+16305550100;tgrp=1;trunk-
context=example.com@10.1.0.3;user=phone SIP/2.0
[0] Disable = The 'tgrp' parameter isn't used (default).
[1] Send Only = The Trunk Group number is added to the 'tgrp'
parameter value in the Contact header of outgoing SIP
messages. If a Trunk Group number 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 in option (1).
In addition, for incoming SIP messages, 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 (PSTN-to-IP call) contains "tgrp=<source trunk group
ID>;trunk-context=<gateway IP address>". The <source trunk
group ID> is the Trunk Group ID where incoming calls from PSTN
is received. For IP-PSTN 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 Trunk Group ID used for outgoing PSTN calls. The
<gateway IP address> in "trunk-context" can be configured using
the parameter SIPGatewayName.
Determines whether the Globally Routable User Agent URIs (GRUU)
mechanism is used.
[0] Disable = Disable (default)
[1] Enable = Enable
The device obtains a GRUU by generating a normal REGISTER
request. This request contains a Supported header with the value
'gruu'. The device includes a '+sip.instance' Contact header
parameter for each contact for which the GRUU is desired. This
Contact parameter contains a globally unique ID that identifies the
device instance.
The global unique ID is as follows:
If registration is per endpoint (AuthenticationMode=0), it is the
MAC address of the device concatenated with the phone number
of the endpoint.
If the registration is per device (AuthenticationMode=1) it is only
the MAC address.
When the User Information mechanism is used, the globally
unique ID is the MAC address concatenated with the phone
number of the endpoint (defined in the User-Info file).
If the Registrar/Proxy supports GRUU, the REGISTER responses
contain the 'gruu' parameter in each Contact header field. The
Registrar/Proxy provides the same GRUU for the same AOR and
instance-id in case of sending REGISTER again after expiration of
the registration.
The device places the GRUU in any header field which contains a
URI. It uses the GRUU in the following messages: INVITE requests,
307
6. Configuration Parameters Reference
Description
September 2009