Yealink SIP-T4X, Administrator'S Manual

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Configuring Basic Features
93
Session Timer on page 298 .
Local Web User Interface
Configure session timer.
Navigate to:
http://<phoneIPAddress>/servlet
?p=account-adv&q=load&acc=
0
To configure session timer via web user interface:
1. Click on Account.
2. Select the desired account from the pull-down list of Account.
3. Click on Advanced.
4. Select the desired value from the pull-down list of Session Timer.
5. Enter the desired time interval in the Session Expires (30~7200s) field.
6. Select the desired refresher from the pull-down list of Session Refresher.
7. Click Confirm to accept the change.
Call hold provides a service of putting an active call on hold. When a call is placed on
hold, the IP phone sends an INVITE request with a HOLD SDP to the server. IP phones
support two call hold methods, one is RFC 3264, which sets the ―a‖ (media attribute) in
the SDP to sendonly, recvonly or inactive (e.g., a=sendonly). The other is RFC 2543,
which sets the ―c‖ (connection addresses for the media streams) in the SDP to zero (e.g.,
c=0.0.0.0). The call hold tone feature allows IP phones to play a hold tone at regular