AT&T Merlin II Manual

AT&T
518-600-016
MERLIN II
®
COMMUNICATIONS SYSTEM
Installation, Administration,
and Maintenance Manual

©1990 AT&T Issue 2
All Rights Reserved
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 II Communications
System System Manual for that release. For information
on data communications options with the MERLIN II
system, refer to the MERLIN II Co
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 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
72 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
04
03
02
01
PFT
08
07
06
05
PFT
12
11
10
09
PFT
16
15
14
13
PFT
20
19
18
17
08
07
06
05
04
03
02
01
16
15
14
13
12
11
10
09
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
40
39
38
37
36
35
34
33
\
/
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

●
MERLIN II Attendant. The MERLIN II Attendant
automatically answers and routes incoming calls. The
feature is available only when the optional MERLIN II
Attendant accessory is installed. Also, to gain access
to this feature, you
must use the517C13 Basic
Telephone (012) Module.
The MERLIN II Attendant performs two major
functions (Figure 1-3):
>
Immediate call handling, in which all incoming
calls are received and routed by the MERLIN II
Attendant. Multiple MERLIN II Attendants can
be used to handle call groups.
>
Backup call handling, in which incoming calls are
directed to the MERLIN II Attendant if the
receptionist (Station 10) does not answer within a
predetermined number of rings.
Each of these functions includes night service call
handling in which the MERLIN II Attendant maybe
used for call coverage only after normal business
hours.
●
On-Line Module Swap. The On-Line Module Swap
feature allows you to replace a module in the control
unit without powering the system down. The
replacement module must be the same as the one
removed (i.e., a 408 module must be replaced with a
408 module). To use this feature, it is necessary to
follow the exact procedures described in “On--
Module Swap,
w
on page 4-7.
●
Page All. This feature allows you to page all
telephones in the system at once over voice terminal
speakers.
1-8 System Overview

● Posted Message. The Posted Message feature
provides a method of sending one of 20 user-defined
messages to another terminal. Each message can be up
to 16 characters long and will appear on the caller’s
display.
● System Speed Dial. System Speed Dial allows the
caller to store frequently used numbers as three-digit
codes. For Release 3, the feature has been enhanced to
accommodate 130 speed dial numbers.
● Tie Lines. The MERLIN II system interfaces to a tie
line with E&M signaling through a Tie Line Module.
This feature permits the interconnection of a MERLIN
II system to another MERLIN II system or to other
switches such as a System 25,75, or 85 PBX. (See
“E&M Signaling” on page 1-45 for a description of
E&M signaling.)
System Overview 1-9

Call transferred to
receptionist;
MERLIN II Attendant
disconnects
MERLIN II Attendant
answers call.
▲
No Caller
enters route
or extension
number.
No
Route
or extension
valid?
Yes
Route
or extension
answers?
Yes
No
Second
route or
extension
answers?
Yes
No
call transferred; connection
announcement played;
MERLIN II Attendant
disconnects.
MERLIN II Attendant
plays Transfer Fail
announcement.
No
Does
caller select
another route
or extension?
Yes
Repeat process
FIGURE 1-3 MERLIN II Attendant operation.
1-10 System Overview

TABLE 1-1 MERLIN II System Features
Feature
FM1 FM2
Release 3
Account Code Entry
x1xx
Allowed List
xxx
Attendant (Automatic) [MERLIN II Attendant]
x
Attendant Barge-in
xx2
Attendant Position Setting
xxx
Auto Answer All
xxx
Auto Answer-Intercom
xxx
Auto Intercom
x x x
Automatic Line Selection (ALS)
x x x
Automatic Route Selection (ARS)
x x x
Basic Telephones
x x x
Behind-Switch Operation
xx
Bridging on Shared Lines
x3x3x
Call Coverage
xxx
1 The feature name is "Account Number Entry- for Feautre Module 1.
2 The feature name is ‘Executive Barge-In- for Release 3 and can be used from any voice terminal.
3 The feature name is “Bridging” for Feature Module 1 and Feature Module 2
System Overview 1-11

TABLE 1-1 MERLIN II System Features (continued)
Feature
FM1
FM2 Release 3
Call Forwarding and Follow Me x x
Call Park
x x x
Call Pickup
x4x4x4
Call Pickup Groups
xx
Call Report (SMDR)
xxx
Call Restriction
xx x
Camp On
x x
Centralized Programming
xx x
Conference
xx x
Coverage Inhibit
xxx
Dialing Timeout Internal for Rotary Lines xxx
Direct Inward System Access (DISA)
xx
Disallowed List
x
Display
xxx
Do Not Disturb
x x x
Drop
x x x
4 This feature in Feature Module 2 and Release 3 is the same as "Line Pickup” in Feature Module 1.
1-12 System Overview

TABLE 1-1 MERLIN II System Features (continued)
Feature
FM1 FM2 Release 3
Executive Barge-In
x5x
Extended Station Status (ES Status)
xx
Flexible Numbering
x x
Follow Me
xx6
Forced Account Code Entry (FACE)
xx
Group Call Distribution (GCD) xxx
Group Listening
xx x 7
Group Page
xx x
Hold
x
x
x
Hold Disconnect Interval xxx
Intercom
x x x
Intercom Dial Tone
x x
Labels for Lines and Stations
x8x
Last Number Redial
x x x
5 For Feature Module 2, the feature name is “Attendant Barge-In” and it operates only from an attendant
station.
6 For Release 3, the feature name is “Call Forwarding and Follow Me”
7 The information for this feature is found in Section 2, "System Components," of the System Manual for
Release 3.
8 For Feature Module 2, the feature name is "labels for Stations” and it is limited to stations only.
System Overview 1-13

TABLE 1-1 MERLIN II System Features (continued)
Feature
FM1
FM2 Release 3
Leave Word Calling
xxx
Line Assignments in Behind-Switch Systems
xx
Line Assignments in Pooled Systems
x9xx
Line Assignments in Square Systems
x10x x
Line Pickup
x11
Line Representation Setting xx12x12
Line Request
xx x
Loudspeaker Page
xxx
Manual Signaling
x x x
Menu Driven Administration
xx13
Message
x x x
Monitor-on-Hold
xxx14
9 The feature name is "Line Pools" for Feature Module 1.
10 The feature name is "Square Line Configuration" for Feature Module 1.
11 This feature is called "Call Pickup" for Feature Module 2 and Release 3.
12 The feature name is “System Type” for Feature Module 2 and Release 3.
13 This is not technically a feature of MERLIN II System with Release 3, since menu-driven is the only
administration method for that release. See “Overview” in Section 3, "Reference," of the Release 3 System
Manual for information on menu-driven administration.
14 The information for this feature is found in Section 2, "System Components," of the System Manual for
Release 3.
1-14 System Overview

TABLE 1-1 MERLIN II System Features (continued)
Feature
FM1 FM2 Release 3
Music-on-Hold
x x x
Night Service
xxx
Notify
xxx
On-Hook Dialing
xxx15
On-Line Module Swap
x
One-Touch Hold with Call Announcement
x x x
Outside Auto Dial
xxx
Page All
x
PBX, Centrex, or Custom Calling Features
x x
Personal Speed Dial
xxx
Personalized Ringing
xxx
Posted Message
x
Privacy x x x
Reed xxx
Recall Timer Interval
xxx
Reminder Service
xx
15 The information for this feature is found in Section 2, "System Components," of the System Manual for
Release 3.
System Overview 1-15

TABLE 1-1 MERLIN II System Features (continued)
Feature
FM1 FM2 Release 3
Ringing/Idle Line Preference
x16x x
Ringing-on-Transfer
xxx
Ringing Options
x x x
Saved Number Redial
xxx
Send Message
xx x
Simultaneous Voice and Data Calls
xx x
Special Characters in Programmed Dialing Sequences
xxx
Stopwatch
xxx
System Renumbering
xxx
System Size
x17xx
System Speed Dial
xxx
System Type
x18xx
Test
xxx19
16 The feature name is “Ringing Line Preference” for Feature Module 1.
17 The feature name is “System Size Setting- for Feature Module 1.
18 This feature name is "Line Represention Setting" for Feature Module 1.
19 The information for this feature is found in Section 2, "System Components," of the System Manual for
Release 3.
1-16 System Overview

TABLE 1-1 MERLIN II System Features (continued)
Feature
FM1
FM2 Release 3
Tie Lines
x
Tones
xxx20
Touch-Tone Enable
xxx
Touch-Tone or Rotary Signaling
x21xx
Transfer
xxx
Transfer Return Interval
xxx
Type of Telephone
x22x22x
Voice Announcement Enable/Disable xxx
Voice Announcement to Busy Telephone
x23x23x
20 The information for this feature is found in Section 2, “System Components,” of the System Manual for
Release 3.
21 The feature name is "Touch-Tone or Rotary Setting" for
Feature Module 1.
22 The feature name is "Voice Terminal Type Setting" for Feature Module 1, and "Voice Terminal Type" for
Feature Module 2.
23 The feature name is "Voice Announcement to Busy Voice Terminal" for feature Module 1 and Feature
Module 2.
System Overview 1-17