Yealink SIP-T48G Administrator's Manual page 178

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
4. (Optional.) Enter the call waiting off code in the Call Waiting Off Code field.
5. Click Confirm to accept the change.
To configure call waiting tone via web user interface:
1. Click on Features->Audio.
2. Select the desired value from the pull-down list of Call Waiting Tone.
3. Click Confirm to accept the change.
To configure call waiting and call waiting tone via phone user interface:
1. Press Menu->Features->Call Waiting.
2. Press
Waiting field.
3. Press
Tone field.
4. (Optional.) Enter the call waiting on code in the On Code field.
164
or , or the Switch soft key to select the desired value from the Call
or , or the Switch soft key to select the desired value from the Play