AT&T Merlin II Release 3 User guide

AT&T
MERLIN
®
II
COMMUNICATIONS SYSTEM
Release 3
System Manual

©1991 AT&T
All Rights Reserved
Issue 4
Printed in USA March, 1991
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.
To order copies of
this document, call the AT&T Customer Information Center, 1-800-432-6600 and
include the document number 999-507-146 with your order.

Warranty
AT&T warrants that this product will be free from defects in material and
workmanship on the date of your purchase, and that it will repair or replace,
at its option, without charge for parts or labor, the product if it fails to work,
provided that the effect is reported to AT&T within one year of your
purchase. If AT&T determines that any defective product cannot be replaced,
it may refund your purchase price. Replacement parts or products may be
new or equivalent to new in performance, and will be provided on an
exchange basis. For information on repair procedures, call your authorized
dealer.
The warranties provided in this section do not cover damages, defects,
malfunctions or product failures caused by:
● Failure to follow AT&T installation, operation or maintenance instructions;
● Modification of the Products;
● Abuse, misuse or negligent acts by persons other than AT&T, or
● Power failures, fire, flood, accident, actions of third parties and other
events outside AT&T control.
Except as specifically made in this agreement, AT&T and its affiliated
subcontractors and agents make no warranties, express or implied, and
specifically disclaim any warranty of merchantability or fitness for a
particular purpose.
In no event will AT&T or its dealer be liable for any claims, suits,
liabilities, damages, costs or expenses in excess of $50,000 regardless of the
form of action, whether in contract, tort (including negligence) and strict
liability or otherwise, and whether or not foreseeable, except for direct
damages for personal injury (including death). In no event will AT&T or its
dealer be liable for indirect, special reliance, incidental or consequential loss
or damage arising out of the subject matter of this agreement.

Contents
Section 1: Getting Started
What’s in This Manual
1-1
Other MERLIN II System Documentation
1-2
FCC Notification and Repair Information
1-3
Section 2: System Components
The Control Unit
2-1
Type of System 2-2
MERLIN II System Telephones
2-6
Phone Accessories
2-17
Section 3: Reference
Overview
3-1
Checklist of Features
3-6
MERLIN II System Features
3-8
Quick Reference Guide to Programming 3-144
Quick Reference Guide to Printing
3-147
Section 4: Troubleshooting
Troubleshooting Procedures
4-1
Index
Index
I-1

What’s in This Manual
SECTION 1: GETTING
STARTED
SECTION 2: COMPONENTS
OF YOUR SYSTEM
SECTION 3: REFERENCE
SECTION 4:
TROUBLESHOOTING
The information in this MERLIN® II Communications System Manual is for use
with Release 3 of the MERLIN II system. This manual is divided into four
sections, as described below.
This section tells you what’s in the manual and what other documentation is
available for the system.
This section describes the control unit, the different system types, and the
telephones and accessories available with your system. Here you’ll also find
details about lights, buttons, and signals that identify the status of calls and
selected features.
This section contains a detailed discussion of each feature in the MERLIN II
system. It begins with a description of how to administer and program
features, and then provides a checklist of features you should consider for
your business needs. Following the checklist are the feature descriptions
organized alphabetically by feature name. You can read the descriptions to
familiarize yourself with the features, then follow the tables to perform the
procedures for administering, programming, and using the features. A quick
reference guide to programming, that lists all the programmable features in
alphabetical order, is provided at the end of this section.
This section helps isolate and resolve problems you may encounter with your
system.
What’s in This Manual 1-1

Other MERLIN II System Documentation
The documents you need to use with your MERLIN II system come packaged
with it. Other related documents, listed below, and additional copies of the
documents that come with the system can be ordered by calling the AT&T
Customer Information Center at l-800-432-6600.
MERLIN II System Release 3 Document
Installation, Administration, and Maintenance Manual
User’s Guide: Basic Touch-Tone and Rotary Telephones
User’s Guide: 5, 10, 22, and 34 Button Telephones
User’s Guide: 7406D Telephones
Attendant’s Guide
Planning Guide
Data Communications Guide
System Manual
MERLIN II Attendant User’s Guide
MERLIN II Attendant Planning Forms
MERLIN II Attendant Installer’s Guide
Customization Chart for Menu-Driven Administration
Ordering Number
518-600-016
999-503-141
999-503-142
999-503-143
999-508-148
999-503-144
518-600-038
999-507-146
999-504-140
999-504-139
518-600-017
999-507-147
PLANNING GUIDE
USER GUIDES FOR
You’ll find copies of the attendant and user guides with this binder.
TELEPHONES AND Distribute those guides to the appropriate people as soon as possible so they
ATTENDANT CONSOLE can learn how the system works and how they can make the most of its
optional features.
The MERLIN II Communications System Release 3 Planning Guide provides
planning forms and instructions for planning the features you need and for
determining the initial capacity of your system.
DATA COMMUNICATIONS If your system includes digital data equipment, a MERLIN II Communications
GUIDE
System Release 3 Data Communications Guide is included with the data module.
SERVICE MANUAL If you have the expertise to plan, install, and administer the system yourself,
you should order a copy of the MERLIN II Communications System Installation,
Administration, and Maintenance Manual. Please do not attempt to install the
system without this manual.
1-2 Other MERLIN II System Documentation

FCC Notification and Repair Information
INTERFERENCE
Federal Communications Commission (FCC) Rules require that you be
INFORMATION NOTICE notified of the following:
● This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions in this
manual and the MERLIN II Communications System Installation,
Administration, and Maintenance Manual, may cause interference to radio
communications.
● This equipment has been tested and found to comply with the limits for a
Class A computing device pursuant to Subpart J of Part 15 of FCC Rules,
which are designed to provide reasonable protection against such
interference when the equipment is operated in a commercial
environment.
● Operating this equipment in a residential area is likely to cause
interference, in which case the user, at his or her own expense, will be
required to do whatever is necessary to correct the interference.
FCC REGISTRATION AND This equipment is registered with the FCC in accordance with Part 68 of its
REPAIR INFORMATION rules. In compliance with those rules, you are advised of the following:
● Means of Connection: Connection to the telephone network shall be
through a standard network interface jack USOC RJ1lC or RJ14C.
Connection to E&M Tie Trunks requires a USOC RJ2GX. Connection to
Off-Premises Stations requires a USOC RJ1lC. Connection to 1.544 Mbs
digital facilities must be through a USOC RJ48C. These shall be ordered
from your Telephone Company. This equipment may not be used with
party lines or coin telephone lines.
● Notification to the Telephone Companies: Before connecting this
equipment, you or your equipment supplier must notify your local
telephone company’s business office of the following:
➤ The telephone numbers you will be using with this equipment.
➤ The appropriate registration number and ringer equivalence number
(REN) which can be found on the back or bottom of the control unit as
follows:
If this equipment is to be used as a key system, report number
AS593M-72914-KF-E. If the system provides both manual and
automatic selection of incoming/outgoing access to the network, report
AS593M-72682-MF-E. The ringer equivalence number for both systems
is 0.5A.
➤ For tie line connection provide facility interface code (FIC) TL31M and
service order code (SOC) 9.0F.
➤ For connection to off-premises stations, report FIC OL13C and SOC
9.0F.
FCC Notification and Repair Information 1-3

➤ If this equipment is to be connected to digital services (1.544 Mbs),
report FIC 04DU9-B and SOC 6.0N.
➤ Report the quantities and USOC numbers of the jacks required.
➤ For each jack, provide the sequence in which lines are to be
connected, the type lines, the FIC and REN by position when
applicable.
You must also notify your local telephone company if and when this
equipment is permanently disconnected from the line(s).
PROBLEM AND REPAIR If you have any problems or questions about your MERLIN II
ASSISTANCE
Communications System, or if you need repair information, please call the
AT&T National Service Assistance Center: 1-800-628-2888.
● Installation Instructions for Equipment Installers and Operational
Procedures: This manual contains information about operational
procedures of the MERLIN II system. The MERLIN II Communications
System Installation, Administration, and Maintenance Manual contains
information about both installation and operational procedures.
1-4 FCC Notification and Repair Information

The Control Unit
The control unit is the vital core of the system. It provides the power and
intelligence for all your telephones, and it directs incoming and outgoing call
traffic. All the system’s memory, including systemwide administration, line
assignments, and phone programming, resides in the control unit. Figure 2-1
shows a typical control unit with the front cover removed.
FIGURE 2-1 The MERLIN II system control unit.
The control unit must contain the following modules:
● Power Supply Module
● Processor Module
● Circuit Pack (008 or 408) Module in slot 1 of the basic carrier.
NOTE: There is no required slot assignment for line and/or station modules
(008, 008D, 400w/TTR, 408, or 800) except that the module in slot 1 of
the basic carrier must be a 008 or a 408 module.
The Control Unit 2-1

Type of System
SQUARE
The type of system selected affects how you handle calls and how you use
certain features. The figures below show the three system types (Square,
Behind-Switch, and Pooled) and their options. Section 3, “Reference,”
identifies how to handle calls and features that are affected by the system
type you’re using.
The system types and their options are as follows:
● Square. Each line appears on a separate button. Square systems can be
standard or customized.
● Behind-Switch. The MERLIN II system operates behind a larger system
such as a PBX. Lines appear on separate buttons.
● Pooled. Interchangeable lines (e.g. WATS) are grouped into line pools.
There are three options with pooled systems:
➤ Button Access. You select a line pool by touching its button.
➤ Dial Access. You select a line pool by dialing its code.
➤ Automatic Route Selection (ARS). The system places a call on the line
identified as the most appropriate for that call.
(NONPOOLED) In a square system, each line appears on a separate button on each phone.
This arrangement simplifies call handling because people can join calls or pick
up calls on hold just by touching the appropriate line button on almost any
phone.
In the standard configuration, all phones have access to the same lines on the
same buttons. See Figure 2-2.
MERLIN II
System Control Unit
Line Line Line Line
A B
C D
Standard
FIGURE 2-2 Example of a standard square (nonpooled) system.
2-2 Type of System