1.2 Making CallsUser Manual 311.2.4 When the Dialled Party is Busy or There is No Answer– Reserving a Busy Line (Automatic Callback Busy [Camp-on])– Sending a Call Waiting Tone to a Busy Extension (Busy Station Signalling [BSS])– Leaving a Message Waiting Indication/Calling Back a Caller Who Left an Indication (Message Waiting)– Joining an Existing Call (Executive Busy Override)– Calling an Extension That Is Refusing Calls (DND Override)Reserving a Busy Line (Automatic Callback Busy [Camp-on])If a dialled extension or a desired outside (CO) line is busy, you can set the Automatic Callback Busy feature.Then, when the extension or outside (CO) line becomes idle, your telephone will ring automatically. When you answer the callback ring:• a dialled extension becomes idle.• a desired outside (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 ring:• for an outside (CO) line call: the line is seized.• for an intercom call: the called extension starts ringing automatically.To set for both an outside (CO) line call and an intercom callTo answer a callback ring set for a busy extensionPT/SLTWhile hearing a busy toneEnter 6.6On-hook.C.ToneOff-hook.PT/SLTTalk.While hearing a callback ringR.B.Tone
