Modes Of Operation - AT&T MERLIN LEGEND Installation & Maintenance Manual

System Description

Modes of Operation

The system is designed for customers in the 10- to 100-station
range. It can be configured to operate in one of three modes:
Hybrid/PBX
Key
Behind Switch
Hybrid/PBX Mode
The Hybrid/PBX mode handles a large volume of calls and users
and provides the most flexibility of the three modes. Outside
facilities consist of Ioop-start trunks, ground-start trunks, direct
inward dialing (DID) trunks, tie trunks, and Digital Signal 1 (DS1)
facilities. The trunks can be grouped in pools for shared use. In
addition, trunks can be assigned to line buttons on multiline
telephones for users who need a personal line.
Users access inside lines and outside trunks via system access
buttons. To make an outside call, the user enters a dial-out code
(usually a 9), and the system automatically selects an available
trunk. The Automatic Route Selection feature determines which
trunk should be used for each type of outgoing call.
Incoming calls can be handled by a direct-line console (DLC) or
a queued call console (QCC), or by a combination of both
console types.
1-2 Modes of Operation