Call Hold - Yealink SIP-T48G Administrator's Manual

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
Details of the Configuration Parameter:
phone_setting.is_deal180
Description:
Enables or disables the IP phone to deal with the 180 SIP message received after the
183 SIP message.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), the IP phone will resume and play the local ringback tone
upon a subsequent 180 message received.
Web User Interface:
Features->General Information->180 Ring Workaround
Phone User Interface:
None
To configure 180 ring workaround via web user interface:
1. Click on Features->General Information.
2. Select the desired value from the pull-down list of 180 Ring Workaround.
3. 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
132
Parameter Permitted Values Default
0 or 1 0