User's Manual 67. Configuration Parameters Reference
Version 6.8 1009 Mediant 500L MSBR
Parameter Description
The valid range is 0 (default) to 1,000,000, where 0 means that
the device does not limit Session-Expires.
CLI: configure voip/sbc general-
setting/sbc-session-refresh-policy
[SBCSessionRefreshingPolicy]
Defines the SIP user agent responsible for periodically sending
refresh requests for established sessions (active calls). The
session refresh allows SIP UAs or proxies to determine the status
of the SIP session. When a session expires, the session is
considered terminated by the UAs, regardless of whether a SIP
BYE was sent by one of the UAs.
The SIP Session-Expires header conveys the lifetime of the
session, which is sent in re-
INVITE or UPDATE requests (session
refresh requests). The 'refresher=' parameter in the Session-
Expires header (sent in the initial INVITE or subsequent 2xx
response) indicates who sends the session refresh requests. If
the parameter contains the value 'uac', the device performs the
refreshes; if the parameter contains the value 'uas', the remote
proxy performs the refreshes. An example of the Session-Expires
header is shown below:
Session-Expires: 4000;refresher=uac
Thus, this parameter is useful when a UA does not support
session refresh requests or does not support the indication of
who performs session refresh requests. In such a scenario, the
device can be configured to perform the session refresh requests.
[0] Remote Refresher = (Default) The UA (proxy) performs the
session refresh requests. The device indicates this to the UA
by sending the SIP message with the 'refresher=' parameter in
the Session-Expires header set to 'uas'.
[1] SBC Refresher = The device performs the session refresh
requests. The device indicates this to the UA by sending the
SIP message with the 'refresher=' parameter in the Session-
Expires header set to 'uac'.
Note: The time values of the Session-Expires (session refresh
interval) and Min-SE (minimum session refresh interval) headers
can be configured using the SBCSessionExpires and SBCMinSE
parameters, respectively.
Web: User Registration Grace
Time
CLI: configure voip/sbc general-
setting/sbc-usr-reg-grace-time
[SBCUserRegistrationGraceTi
me]
Defines additional time (in seconds) to add to the registration
expiry time of registered users in the device's Users Registration
database.
The valid value is 0 to 300 (i.e., 5 minutes). The default is 0.
Web/EMS: Handle P-Asserted-
Identity
CLI: p-assert-id
[SBCAssertIdentity]
Global parameter that defines the handling of the SIP P-Asserted-
Identity header. You can also configure this functionality per
specific calls, using IP Profiles (IpProfile_SBCAssertIdentity). For
a detailed description of this parameter and for configuring this
functionality in the IP Profile table, see ''Configuring IP Profiles''
on page 332.
Note: If this functionality is configured for a specific IP Profile, the
settings of this global parameter is ignored for calls associated
with the IP Profile.
Web: Keep original user in
Register
[SBCKeepContactUserinRegist
Determines whether the device replaces the Contact user with a
unique Contact user in the outgoing message in response to a
REGISTER request.
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