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4.2 Feature Number Table
User Manual 189
Feature (While busy, DND or call tone is heard) Default
1.2.4 When the Dialled Line is Busy or There is No Answer
Sending a Call Waiting Tone (Call Waiting) 1
To an Extension Refusing the Call (DND Override)
Joining an Existing Call (Executive Busy Override) 3
Leaving a Message Waiting Indication/Calling Back the Caller Who Left an
Indication (Message Waiting)
– To leave 4
Monitoring Another Extension (Call Monitor) 5
Reserving a Busy Line (Automatic Callback Busy)/Setting Callback on an
ISDN Line (Completion of Calls to Busy Subscriber [CCBS])
6
1.2.6 Alternating the Calling Method (Alternate Calling—Ring/Voice)
Feature (While dialling or talking)
Fixed
Number
1.4.5 Multiple Party Conversation
Adding Other Parties during a Conversation (Conference) 3
1.9.1 If a Doorphone/Door Opener is Connected
From any extension while talking to the doorphone 5