1.3.3 Alternate Calling—Ring/VoiceThe caller can alternate the alerting method, either ring orvoice, when making an intercom call.On the other hand, any extension can set the alertingmethod, either ring or voice, when receiving an intercom call.Ringing (Default): You can call the other party with a ringtone.Voice-calling: You can talk to the other party immediatelyafter confirmation tone.RingRing HelloORTo change the methodAfter dialingEnter .PT/SLT/PSTalk.C.Tone• Voice-calling from a SIP extension is not available.• If the called party uses a SIP extension, single line telephone (SLT) or portable station (PS),Voice-calling is not available.• This feature is not available when the called party’s telephone is in the Voice Call Deny mode.Customizing Your Phone• 3.1.2 Personal Programming—Alternate Receiving—Ring/VoiceSelect the alerting method, either ring or the other party’s voice.1.3.4 Automatic Callback Busy (Camp-on)If a dialed extension or a desired CO line is busy, you can set the telephone to receive callback ringing:• when a dialed extension becomes idle.• when your desired CO line that is in use by another extension becomes idle.You cannot set Automatic Callback Busy for a busy party outside of the PBX.When you answer the callback ringing:• For an outside call: The line is seized.• For an intercom call: The called extension starts ringing automatically.Document Version 2013-04 Operating Manual 391.3.4 Automatic Callback Busy (Camp-on)