Specifications

Administrator’s Guide for SIP-T2xP IP Phones

2. Select the desired value from the pull-down list of Use Outbound Proxy In Dialog.

3. Click Confirm to accept the change.

SIP Session Timer

SIP session timers T1, T2 and T4 are SIP transaction layer timers defined in RFC 3261. Timer

T1 is an estimate of the Round Trip Time (RTT) of transactions between a SIP client and

SIP server. Timer T2 represents the maximum retransmitting time of any SIP request

message. The retransmitting and doubling of T1 will continue until the retransmitting

time reaches the T2 value. Timer T4 represents the time the network will take to clear

messages between the SIP client and server. These session timers are configurable on IP

phones.

Procedure

SIP session timer can be configured using the configuration files or locally.

Configuration File

<MAC>.cfg

Configure SIP session timer.

For more information, refer to SIP

Session Timer on page 290.

Local

Web User Interface

Configure SIP session timer.

Navigate to:

http://<phoneIPAddress>/servlet

?p=account-adv&q=load&acc=