User's Manual

endpoint performs the refresh. The session interval is the maximum amount of time that occurs
between session refresh requests in a dialog box before the session times-out. The minimum
for this field is 90 seconds; the recommended value is 1800 seconds (30 minutes).
Min-SE header
The Min-SE header indicates the minimum value for the session expiration in units of delta-
seconds. When your make a call, the presence of the Min-SE header informs the terminating
endpoint, and proxies, of the minimum value that the originating endpoints accept for the
session timer duration in units of delta seconds. When present in a 422 response, the Min-SE
header indicates the minimum session value the terminating endpoint accepts. When present
in a request or response, the value of the Min-SE header is 90 seconds or more. If the Min-
SE header is not present, the default value is 90 seconds. It is a configurable parameter
.
Provisioning
The IP
Deskphone uses the configuration parameters for the Session Timer Service to indicate
if the Session Timer Service is available, and to configure the duration of the session timer.
The following table describes the five configuration parameters in the device configuration file
for Session Timer Service.
Table 26: Session Timer Service configuration parameters
Parameter name Description Default value
SESSION_TIMER_ENABLE Indicates if the session timer
service is enabled or disabled. If
configured as
Yes, the Session
Timer Service for the IP
Deskphone is enabled, and the
behavior of the IP Deskphone
complies with RFC4028. If
configured as No, the Session
Timer Service is disabled.
Yes
SESSION_TIMER_DEFAULT_SE Indicates the default session
expiration in seconds. The
Session-Expires header, in a
request, informs the terminating
endpoint and proxies of the
Session-Expires interval value that
the originating endpoint requires
for the session timer duration, in
unites of delta seconds.
1800
SESSION_TIMER_MIN_SE Indicates the minimum session
expiration in seconds.
1800
Features
174 SIP Software for Avaya 1100 Series IP Deskphones-Administration November 2012
Comments? [e-mail]