Web User Interface

System → User Preferences → Call Waiting → Enable Call Waiting Tone

Phone User Interface

Features → Call → Call Waiting → Show Alert (Yes/No)

XML Configuration

<user_pref>

<call_waiting>

<tone_enable>VALIDVALUE</tone_enable>

</call_waiting>

</user_pref>

Description

Enable call waiting tone.

Valid Values

0 (disabled), 1 (enabled)

Default Value

1