AT&T Merlin II Manuel

AT&T

518-600-016

MERLIN II

COMMUNICATIONS SYSTEM

Installation, Administration,

and Maintenance Manual

Issue 2

January, 1990

Printed in USA

NOTICE

The information in this document is subject to change without notice. AT&T

assumes no responsibility for any-errors that may appear in this document.

MERLIN is a registered trademark of AT&T.

HOLADAY is a trademark of Holaday Industries.

Section 1: System Description

What’s in This Manual

1-1

Section 1: System Description

1-1

Section 2: Installation

1-1

Section 3: Administration

1-1

Section 4: Troubleshooting

1-1

Section 5: Ordering Information

1-1

System Overview

1-2

System Configuration

1-4

System Features

1-7

System Hardware

1-18

MERLIN II System Components

1-18

Control Unit Components

1-18

Module Controls and Indicators

1-23

Voice Terminals

1-25

Basic Operation of Voice Terminals

1-29

System Accessories

1-31

Theory of Operation

1-36

System Architecture

1-36

Analog to Digital Signal Processing

1-40

Digital Switching

1-42

System Capacity

1-44

E&M Signaling

1-45

System Connectivity

1-52

Simultaneous Voice Data

1-52

Local Host Computer Access

1-54

Modem Pools

1-54

General Requirements for Modems

1-58

Music-On-Hold

1-60

External Loudspeaker Paging

1-60

What's in This Manual

SECTION 1: SYSTEM

DESCRIPTION

SECTION 2:

INSTALLATION

SECTION 3:

ADMINISTRATION

SECTION 4:

TROUBLESHOOTING

SECTION 5:

ORDERING

INFORMATION

This manual provides information about how to install and

maintain a MERLIN II Communications System. It covers

the MERLIN II System Feature Module 1, Feature Module

2, and Release 3. For further information on specific

features and options, see the

MERLIN

Communications

System System Manual

for that release. For information

on data communications options with the MERLIN II

system, refer to the

MERLIN

mmunications System

Data Communications Guide

for the release.

The information in this manual is divided into five

sections, as described below.

This section provides a general overview of the system

and its components.

This section describes how to wire and install a MERLIN

II system.

This section tells you how to customize and administer the

system to meet specific business needs.

This section can help you isolate and solve technical

problems that may cause the system to malfunction.

This section tells you how to order MERLIN II system

components and accessories.

What’s in This Manual

1-1

System Overview

The MERLIN® II Communications System is a

programmable digital telephone system with many

features to make voice and data easy to manage. It

supports up to 56 outside lines and 120 stations, depending

on the configuration. Voice terminals allow access to the

system for conversations, feature programming, or system

administering. By connecting an optional printer to the

system, the user can receive a detailed call report of each

station’s activity and a printout of all system

administration.

The MERLIN II System is designed to handle integrated

voice and data calls without reducing system capacity. It

can support various terminal types: analog voice

terminals, digital voice terminals, and digital data

terminals. It also supports the new 7102A single-he

voice terminal, Touch-Tone (2500) telephones, and rotary

(500) telephones.

Data and voice options are implemented by selecting the

appropriate station module. There are three types of

station modules: analog modules for analog voice

terminals, basic telephone modules for 7102A, 2500, or

500 sets, and digitaI modules for digital voice terminals

and data devices. Station modules, used with system

accessories, allow the user to select from the simplest

method of voice and data communication to complex

arrangements such as data calls between two digital

stations and modem pooling. Refer to Figure 1-1 for an

example of MERLIN II system configuration.

1-2 System Overview

Analog

Digital

Tie

Basic

Power Processor

station

telephone

line

station

supply

module

module module module

Modern pool types

MERLIN II System control unit

Local host access

Digital Digital Digital

port port port

MTDM MTDM

MTDM

Digital Digital

port port

MPDM MPDM

PT510D

Digital

Voice/Data

7406D/with

display

Digital Voice

Modern Modern

Modern

2500 Port

Host

BTMI

Computer

Analog

port

Central

office

line

7406D

Digital

Voice

7406D/with

Data Stand

Digital

Voice/Data

Analog voice and data Accessories/auxlliary

equipment

Basic voice and data

Display

Console

Basic

Telephone

and Modem

Interface 2

34-Button

Voice Terminal

Music

Coupler

22-Button

Voice Terminal

Single/Multizone

Paging

Modem

Terminal

or PC

Digital voice and data

2500 Type

telephone

500 Type

telephone

10-Button

Voice Terminal

Alerter

Accessories

General

Purpose

Adapter Modem

Terminal

or PC

MERLIN II

Attendant

Answering

machine

Printer

FIGURE 1-1 MERLIN II system configuration.

System Overview 1-3

SYSTEM

The size, type, and features of a MERLIN II system are

CONFIGURATION

determined using system planning forms.

System Size

A MERLIN II system can be as small as four outside lines

and eight analog voice terminals, or as large as 56 outside

lines and

stations. A MERLIN II system with as many

as eight lines and 20 stations is considered a small system

for administration purposes.

Basic and expanded system capabilities are determined by

these system hardware maximum limitations:

System Type

●

Thirty-six analog stations with the Simultaneous Voice

and Data feature

●

Sixty-four digital stations with the Simultaneous Voice

and Data feature

● Eleven line pools

●

Seventy-one off-premises devices or Basic Telephone

and Modem Interfaces

A system can be configured for pooled, square, or behind-

switch operation. The MERLIN II system default

configuration is pooled with button access.

●

In a square system, each outside line has a dedicated

position on a voice terminal. This arrangement is also

known as a key system. In a standard square

configuration, outside lines appear on the same buttons

on each voice terminal. In a customized square

system, different groups of outside lines are assigned

to the same buttons on selected groups of voice

terminals.

1-4 System Overview

●

In a pooled system, outside lines can be grouped into

line pools (groups of interchangeable lines). To get an

outside line in a pooled system, the user must dial an

access number or use a dedicated pool button on the

voice terminal. Access to outside line pools can also

be had through Automatic Route Selection (ARS).

●

In a behind-switch system, the MERLIN II system

operates behind a larger system such as a System 25,

75, or 85 PBX. In this configuration, most features of

both systems are available to the MERLIN II system

user. Refer to Figure 1-2 for an example of a MERLIN

II system operating behind a digital PBX.

System Overview 1-5

Central

office

lines

25 Pair cable

Network

interface

66 Type

hardware DIW cable

Digital PBX

(System 25,

System 75,

or System 85)

408 408 408 408 408

Jack Field

for outside

lines

D2R

Z122C Box

cords

with

Z61OA

Adapters

DIW cable

Power

Supply

PFT

MERLIN II System

D8W

cords

To voice

terminals

and

adjunct

equipment

contol unit

FIGURE 1-2 A MERLIN II system behind-switch operation.

1-6 System Overview

SYSTEM FEATURES

Table 1-1 lists the features that are available for

MERLIN II System Feature Modules 1 and 2, and

Release 3.

NOTE:

The features in Table 1-1 are described fully in

the

MERLIN II Communications System System

Manual.

The following paragraphs describe feature that are either

new in Release 3 or have been significantly modified for

Release 3.

●

Disallowed List.

Using a Disallowed List, you can

create up to eight lists of numbers, area codes, or

exchanges that selected users will not be permitted to

dial. Each list can have up to 10 numbers. The

administrator may assign one or more of these liststo

any station in the system. If a station is assigned so a

disallowed list any attempt to dial a number contained

in the list wiIl be denied.

●

Extended Station Status.

Extended Station Status (ES

Status) indicates the operating status of other stations

to the administrator. When ES Status is administered

for Hotel/Motel mode, the attendant can put voice

terminals into different categories to indicate whether

the room is occupied. With Release 3, if the voice

terminal is off-hook, the attendant can’t change its

status. This ES Status Inhibit feature helps prevent

hotel guests from making calls from their room after

they have checked out.

NOTE:

The alternative to Hotel/Motel mode is Call

Management System (CMS) mode. CMS is

the automatic call distributor (ACD) for the

MERLIN II system, and is available only with

Feature Module 1 or 2,

not

Release 3. The

CMS component of the MERLIN II system

answers calls and connects them to available

agents. CMS is not a system feature and

requires a separate software package.

System Overview 1-7

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