5.02 Intercom CallingDescriptionIntercom Calling allows the extension user to callanother extension user in the same Intercomgroup by dialing the Intercom Number (one ortwo digits) on the ICM button.Refer to Section 3-B-7.01 “Intercom Group” fordetails about Intercom group.Besides Intercom Calling, Intercom facility offersthe following features:• Intercom - Voice Calling• Intercom - Busy Station Signaling (BSS)• Intercom - Off-Hook Call Announcement(OHCA)Refer to descriptions on the following pages.ProgrammingConditionsIntercom Calling is available within the sameIntercom group.SLT telephone users can neither execute norreceive Intercom Calling.System Programming ReferenceVT Dumb“Extension-Station (1/3)”,Intercom NumberICM Group10-C-22.009-G-1.01Operation1. Lift the handset or pressthe SP-PHONE button.2. Press the ICM button.• You hear dial tone 5.• The indicator on the ICMbutton lights in green.3. Dial the intercom number of theother extension.• You hear ringback tone.• An intercom number is one ortwo digit(s).4. When the other party answers,start conversation.5. After finishing conversation,replace the handset or press theSP-PHONE button.(Supplement)In step 3, you can also call the other party bypressing “*,” then dialing the directory number ofthe extension, instead of dialing the intercomnumber.4-C-18
