Grandstream Networks GAC2500 Administration Manual page 42

Register Expiration (m)
Re-register before
Expiration (s)
Wait Time Retry
Registration (s)
Local SIP Port
SUBSCRIBE for MWI
Enable OPTIONS Keep Alive
OPTIONS Keep Alive
Interval (s)
OPTIONS Keep Alive
Maximum Tries
Enable Session Timer
Session Expiration (s)
SIP server.
The default setting is "Instance".
Configures the time period (in minutes) in which the phone refreshes its
registration with the specified registrar. The default setting is 60. The
maximum value is 64800 (about 45 days).
Specifies the time frequency (in seconds) that the phone sends re-
registration request before the Register Expiration. The default setting is
0. The range is from 0 to 64,800.
Configures the time period (in seconds) in which the phone will retry the
registration process in the event that is failed.
Defines the local SIP port used to listen and transmit. The default setting
is 5060 for Account 1, 5062 for Account 2, 5064 for Account 3, 5066 for
Account 4, 5068 for Account 5, and 5070 for Account 6.
Configures the phone system to subscribe voice message service. If it is
set to "Yes", the phone system will periodically send SIP SUBSCRIBE
message for Message Waiting Indication service. GAC2500 phone
system supports both synchronized and non-synchronized MWI. The
default setting is "No".
Configures whether to use OPTIONS to query account registration status.
If enabled, the device will send OPTIONS query message and the
connection status with sever regularly to server. Default setting is "No".
Sets the time interval the device sends the OPTIONS message to server.
The default setting is 30 seconds, which means the device sends the
OPTIONS message to server every 30 seconds. The effective range is 1-
64800.
Configures the maximum times of sending OPTIONS message
consistently from the phone to server. Phone will keep sending OPTIONS
messages until it receives response from SIP server. The default setting
is "3", which means when the phone send OPTIONS message for 3 times,
and SIP server does not respond this message, the phone will send RE-
REGISTER message to register again. The valid range is 3-10.
Allows the phone system to use the session timer, when set to "Yes", it
will be added in the SIP INVITE message to notify the server.
Configures the phone system's SIP session timer. It enables SIP sessions
to be periodically "refreshed" via a SIP request (UPDATE, or re-INVITE).
If there is no refresh via an UPDATE or re-INVITE message, the session
will be terminated once the session interval expires. Session Expiration is
the time (in seconds) where the session is considered timed out, provided
no successful session refresh transaction occurs beforehand. The default
setting is 180. The valid range is from 90 to 64800.
GAC2500 Administration Guide
P a g e | 41