Version 5.6
129
November 2008
SIP User's Manual
3. Web-Based Management
Parameter
Description
[2]
Play According to Early Media = Ringback tone is played to the Tel
side of the call if no SDP is received in 180/183 responses. If 180/183
with SDP message is received, the device cuts through the voice
channel and doesn't play ringback tone (default).
Use Tgrp Information
[UseSIPTgrp]
Determines whether the SIP 'tgrp' parameter, which specifies the Trunk
Group to which the call belongs is used, 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). If the
Contact header includes a 'tgrp' parameter, it is copied to the
corresponding outgoing messages in that dialog.
Enable GRUU
[EnableGRUU]
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, 2xx
responses to INVITE, SUBSCRIBE requests, 2xx responses to
SUBSCRIBE, NOTIFY requests, REFER requests, and 2xx responses to
REFER.
Note:
If the GRUU contains the 'opaque' URI parameter, the device
obtains the AOR for the user by stripping the parameter. The resulting URI
is the AOR.
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