AT&T 555-600-736 manual Hardware

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HARDWARE

The Legend system hardware most directly connected with Lines/Trunks are the Control Unit Modules. The specifications for each module are presented later in this section. Also the system uses different types of lines/trunks for the different individual functions of each operating mode. In PBX mode the system can use the following:

●Loop-Start (LS) trunks

●Ground-Start (GS) trunks

●Tie trunks

●Direct Inward Dialing (DID) trunks

●ADS 1 facility programmed for either T1 or ISDN-PRI operation.

●Centrex Service lines - Loop Start*

A Key system can use:

●Loop-Start lines

●Tie Trunks

●A DS1 facility programmed for either T1 or ISDN-PRI operation

●Centrex Service lines - Loop Start

●Ground start when registered as MF FCC classification.

A Behind Switch system can use:

●Loop-Start lines

●Tie Trunks

●Centrex Service lines - Loop Start

●A Ground-Start line when registered under the MF FCC classification.

●Direct Inward Dialing lines

The LEGEND system with a basic carrier has five slots for these modules. Up to two expansion carriers can be added, each one adding six slots, for an overall system total of 17 slots.

The system supports 13 types of line/trunk and station modules. The table on the next three pages identifies the various modules and their uses.

4. For dial-tone only in PBX mode. Switchhook flash or pooled Centrex lines will not work to activate Centrex features.