2.10.4.2 Call Waiting ToneDescriptionWhen an extension user attempts to call a busy extension (ringing or having a conversation), the Call Waitingtone can be sent to the called extension to let him know another call is waiting.Conditions• This feature only works if the called extension has activated Call Waiting. If it is activated, the callingextension will hear a ringback tone.• Call Waiting tone can be selected (Tone 1 or Tone 2) through personal programming (Call Waiting ToneType Selection).PC Programming Manual References10.3 PBX Configuration—[2-3] System—Timers & Counters—Miscellaneous— Caller ID—Visual Caller IDDisplay10.6.3 PBX Configuration—[2-6-3] System—Numbering Plan—B/NA DND Call Feature→ BSS / OHCA / Whisper OHCA / DND Override→ BSS / OHCA / Whisper OHCA / DND Override-212.1.1 PBX Configuration—[4-1-1] Extension—Wired Extension—Extension Settings→Option 2— Manual C. Waiting for Extension Call→Option 2— Automatic C. Waiting→Option 4— Call Waiting Tone Type12.2.1 PBX Configuration—[4-2-1] Extension—Portable Station—Extension Settings→Option 2— Manual C. Waiting for Extension Call→Option 2— Automatic C. Waiting→Option 4— Call Waiting Tone TypeUser Manual References1.9.3 Receiving Call Waiting (Call Waiting/Off-hook Call Announcement [OHCA]/Whisper OHCA)3.1.2 Settings on the Programming Mode146 Feature Guide2.10.4 Second Call Notification to Busy Extension