Operational, Basic, and Advanced Parameters
41-001343-02 REV05 – 07.2014
A-83
Parameter
–
sip session timer
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
The time, in seconds, that the IP phone uses to send periodic re-
INVITE
requests to
keep a session alive. The proxy uses these re-
INVITE
requests to maintain the status' of
the connected sessions. See RFC4028 for details.
The minimum session timer is 90.
Format
Integer
Default Value
0
Range
0, 90 +
Example
sip session timer: 90
Parameter
–
sip T1 timer
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
This timer is a SIP transaction layer timer defined in RFC 3261.
Timer 1 is an estimate, in milliseconds, of the round-trip time (RTT).
Format
Integer
Default Value
500
Range
Not Applicable
Example
sip T1 timer: 600
Parameter
–
sip T2 timer
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
This timer is a SIP transaction layer timer defined in RFC 3261.
Timer 2 represents the amount of time, in milliseconds, a non-INVITE server transaction
takes to respond to a request.
Format
Integer
Default Value
0
Range
Not Applicable
Example
sip T2 timer: 8
Parameter
–
sip transaction timer
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
The amount of time, in milliseconds that the phone allows the callserver (regis-
trar/proxy) to respond to SIP messages that it sends. If the phone does not receive a
response in the amount of time designated for this parameter, the phone assumes the
message has timed out.
Format
Integer
Default Value
4000
Range
4000 to 64000
Example
sip transaction timer: 6000