AT&T 944 user manual Expanding the Phone System, Line Groups

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EXPANDING THE PHONE SYSTEM

When you combine two or more 944/955/964 phones you create an interacting system where phones share lines. You can have up to 12 phones and up to 15 telephone lines. The system can be expanded with or without Centrex service.

NOTE: All 944 features work as described earlier in this manual.

Line Groups

When phones share lines, Line-in-use lights let users at different extensions know when a specific line is in use. For accurate Line-in-use lights, the same lines must be connected to each extension in the Line Group, and they must have the same incoming telephone number at each extension.

The chart below shows 12 extensions, each sharing the first three lines, but being assigned to different Line Groups based on other shared or private lines.

Lines in System

		L1	L2	L3	L4	L5	L6
	ICM 11	✔	✔	✔	✔
	ICM 12	✔	✔	✔		✔
Stations	ICM 13	✔	✔	✔	✔
	ICM 14	✔	✔	✔		✔
	ICM 15	✔	✔	✔	✔
	ICM 16	✔	✔	✔		✔
Intercom	ICM 16	✔	✔	✔		✔
	ICM 17	✔	✔	✔	✔
	ICM 18	✔	✔	✔		✔
	ICM 19	✔	✔	✔	✔
	ICM 20	✔	✔	✔		✔
	ICM 20	✔	✔	✔		✔
	ICM 21	✔	✔	✔	✔
	ICM 22	✔	✔	✔			✔

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Contents Part 1 Important Product Information Four-Line Intercom SpeakerphoneContents Before YOU Begin Glossary Feature Function Setting Options Features ListWhen you hear It means Audible SignalsTable/Desk Installation InstallationInstall one 9V battery Two Two-Line Jacks Connect the telephone line cords to the telephoneWall Installation Install one 9V battery Mount the phone on the wall Connect the power adapter to the telephoneTwo Two-Line Jacks Convenience Ports Feature Options Feature SET UPAssign an Extension Number to Your Phone Set the Time/DateTurn the Ringer On or Off for Each Line Select the Ringer Type Set Delay RingTurn Line Usage On or Off for Each Line Assign the Line Group for this Phone Assign the Prime Line Line PreferenceTurn Auto-Mute On or Off Set the Dial Mode Set Audio ModeSet the Flash Time Turn Hold Reminder On or OffErase All Settings and Return the Phone to Default Settings Program the Centrex Console Delayed Ring TimeSet Your Phone to be the Centrex Console Phone Telephone Operation Making or Answering a Call Telephone OperationHandset SpeakerphoneSwitching Modes TimerPause Call Privacy Canceling Call PrivacyDo Not Disturb Restoring Call PrivacyLine-in-Use Lights VolumeRedial Auto Redial Switch Between LinesHold Speakerphone or HeadsetFlash MuteTemporary Tone Dialing Conference CallsTransfer a Call Low Battery IndicatorTo talk privately with one party To drop one lineSpeed Dial Operation Reviewing a Speed Dial Entry Storing a Number in a Speed Dial LocationMaking a Speed Dial Call Intercom Operation Making an Intercom Call with the Handset Basic Intercom OperationsMaking an Intercom Call with the Speakerphone or Headset Switching Between an Intercom Call and a Single-phoneAnswering an Intercom Call Making a Single-phoneAnswering a System-wide Paging All PhonesMaking an Intercom Conference Call Room MonitorAdding a FAX Machine Using a Fax SwitchLine Lights Remain On When No Line is Connected Intercom Paging Signal Not ReceivedCase of Difficulty Telephone Does Not RingOperation During a Power Failure Tone Signals Do Not Activate a Remote DeviceDisplay Screen is Blank Line Groups Expanding the Phone SystemPrivate Lines Centrex Operation Setup ChecklistEnabling the Console Phone Console OperationAnswering a Delayed Ring Setting Ring Delay DurationPicking Up Another Station’s Line Index Audio Mode 4Reset ALL Advanced American Telephones. All rights reserved