Lucent Technologies 5 manual Components2, Key Mode Hybrid/PBX Mode Behind Switch Mode

MERLIN LEGEND Communications System Release 5.0	Issue 1
System Manager’s Guide 555-650-118	June 1997

2About the System

Components Page 2-18

Table 2–1. Continued

Key Mode Hybrid/PBX Mode Behind Switch Mode

Comments	All users need multiline
	phones.
	Line assignments can be
	customized by phone or
	groups of phones. For
	example, you can assign
	tie trunks only to the
	telephones where they
	are needed.

Provides the most efficient	Users can have access to
use of outside trunks. The	most features of both the
Automatic Route	local system and the host
Selection (ARS) feature	system. Single-line phones
can be programmed for	can be used.
the cost-effective use of
pools and the greatest
protection against toll
fraud. Provides greater
functionality for single-line
phones than other modes.
Fewer line buttons
required for users.

Components2

The system includes the following components:

■Control Unit. The circuitry that manages the switching activities of the telephone company’s trunks and your system. It consists of carriers into which modules (circuit packs) are inserted. The module types include a processor module (the “brain” of the system), a power supply module, and a variety of line/trunk or extension modules with jacks for connecting the incoming trunks and the extension lines. The following section explains line/trunk and extension modules in more detail.

A plastic cabinet (the cover) protects the control unit.

■Telephones. Single-line, cordless, cordless/wireless, and analog multiline telephones, as well as digital MLX telephones that offer a variety of features and advanced capabilities. Most MLX telephones have displays that show call information, list features for using the telephone, and provide menu-driven programming instructions. MLX telephones include the following: MLX-5, MLX-5D, MLX-10, MLX-10D, MLX-10DP, MLX-16DP, MLX-20L, and MLX-28D.

■System Operator Consoles. Telephones programmed to handle a variety of operator functions. Types of consoles include:

—Analog or MLX Direct-Line Console (DLC). Outside lines are assigned to individual buttons, and the console can have several calls ringing at the same time. Only certain MLX telephones and analog multiline telephones can be used as DLCs.

—MLX Queued Call Console (QCC). Available only in Hybrid/PBX mode. Incoming calls wait in a queue for the operator and reach the QCC on a first-in, first-out basis, according to the call priority level assigned through system programming. Only one call rings at a time.