Yealink Yealink SIP-T42G, Руководство администратора

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Configuring Basic Features
299
Parameters Permitted Values Default
Web User Interface:
Account->Advanced->Session Refresher
Phone User Interface:
None
To configure session timer via web user interface:
1. Click on Account->Advanced.
2. Select the desired account from the pull-down list of Account.
3. Select the desired value from the pull-down list of Session Timer.
4. Enter the desired time interval in the Session Expires(30~7200s) field.
5. Select the desired refresher from the pull-down list of Session Refresher.
6. Click Confirm to accept the change.
Call hold provides a service of placing an active call on hold. When a call is placed on
hold, the IP phones send an INVITE request with HOLD SDP to request remote parties to
stop sending media and to inform them that they are being held. 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).
Call hold tone allows IP phones to play a warning tone at regular intervals when there is
a call on hold. The warning tone is played through the speakerphone.