Version 6.6 573 October 2014
Installation & Operation Manual 40. General SIP Configuration
Parameter
Name
Type
Provisio
ning
Type
Description
Enable
GRUU
Enum
Disable, Enable
Instant Determines whether or not the
GRUU mechanism is used.
The gateway obtains a GRUU by
generating a normal REGISTER
request. This request contains a
Supported header field with the
value gruu. The gateway includes
a ‘+sip.instance’ Contact header
field parameter for each contact for
which the GRUU is required. This
Contact parameter contains a
globally unique ID that identifies
the media server instance.
The global unique ID is as follows:
If registration is per endpoint, it is
the MAC address of the device
concatenated with the phone
number of the endpoint.
If the registration is per Media
Gatdeway board 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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