Lucent Technologies MERLIN 820 Installation and user guide

MERLIN
Service and Maintenance Manual:
Models 206, 410, and 820
518-600-012IS
Comcode 103973152
Issue 1
February 1985

MERLIN
TM
COMMUNICATIONS SYSTEM
SERVICE AND MAINTENANCE MANUAL:
MODELS 206, 410, AND 820

Table of Contents
Page
Introduction 1
Functional Overview 3
Isolating and Correcting Troubles 21
A. Trouble on One Telephone
A1-1
A2-1
A3-1
A4-1
A5-1
A6-1
A7-1
1. Ringing
2. Dialing
3. Hearing
4. Lights
5. Features
6. Accessories
7. Miscellaneous
B. Trouble on Several Telephones
1. Ringing
2. Dialing
3. Hearing
4. Lights
5. Features
6. Accessories
7. Entire System Down
8. Miscellaneous
B1-1
B2-1
B3-1
B4-1
B5-1
B6-1
B7-1
B8-1
CIBs
Index
NOTE: Pages within the individual trouble sections are numbered in an unusual way to make
this manual easy to update. In page number A1-4, for instance, the A indicates the
section--"A. Trouble on One Telephone." The 1 indicates the first trouble category
within that section--Ringing. The 4 indicates the fourth page of ringing symptoms.
Refer to the letters and numbers on the tab dividers for help in finding page numbers
listed in the index.
i

Introduction
Even the magic of the MERLIN™ communications system sometimes fails. The problem
may be a user error, installation problem, or faulty component. Usually you can correct the
problem on the spot without returning any equipment for maintenance exchange.
The Service and Maintenance Manual: Models 206, 410, and 820 is intended for use by both
the customer and the service technicians. This troubleshooting manual is divided into four
parts:
●
●
●
●
Functional Overview describes each communications system component and its use.
Isolating and Correcting Troubles includes step-by-step procedures to help you isolate a
problem to a user error or a specific component. Most procedures require no tools. A few
procedures require a screwdriver or a basic Touch-Tone or rotary telephone (a Power
Failure Transfer Telephone will work).
CIBs includes copies of customer instruction booklets shipped with the components. The
CIBs describe the functional features and installation of each component.
Index lists problems, features, and components. It will help you find the information you
need quickly.
1

2

Functional Overview
This section describes the components of the MERLIN communications system and explains
how they fit together in a typical installation. Normally, MERLIN system installations will
include most of the major components shown on page 4.
Additional equipment may be attached to the MERLIN system to provide expanded features
and services. See pages 15 to 19 for information about optional voice terminal accessories
and control unit accessories.
Further information on many of the components (including installation instructions) is available
in the customer instruction booklets (CIBs) included under the CIB tab divider. The CIB
number for each component appears near its illustration. When more than one CIB is listed,
the appropriate title also appears.
3

MAJOR SYSTEM COMPONENTS
1. Control unit: The control unit is the heart of the MERLIN system. It provides the
power and intelligence for all voice terminals as well as the connection between voice
terminals and outside lines. Program memory for the MERLIN system resides in the
control unit. The model number of the control unit determines its capacity:
●Model 206 control unit has a capacity of 2 outside lines and 6 voice terminals.
●Model 410 control unit has a capacity of 4 outside lines and 10 voice terminals.
●Model 820 control unit has a capacity of 8 outside lines and 20 voice terminals.
1
Control
unit
5
Voice
3terminal
2
AC outlet Network
Jack field
interface 4
Modular jack
System Overview
2.
3.
Network interface: The network interface connects the control unit and the outside
lines. The two most common network interfaces are the one-line (RJ11) and two-line
(RJ14) interfaces. However, other network interfaces may be used (see the Installation
Guide: Models 206 and 410 and the Installation Guide: Model 820).
Jack field: The jack field provides the connections between the control unit and the
wiring to the voice terminals. The jack field may consist of either jack panel boxes or
modular jacks mounted near the control unit. (However, in some systems, the voice
terminals plug directly into the control unit using modular voice terminal cords and
extension cords.) Optional attachments (extra alerts, paging systems, etc.) may also
connect to the control unit through the jack field.
4

4.
5.
Modular jack: Each voice terminal wiring run from the jack field terminates in a modular
jack at the voice terminal location. Every voice terminal has a separate modular jack.
Voice terminal (MERLIN system telephone): The voice terminal provides basic
telephone functions as well as access to the advanced feature software residing in the
control unit.
MERLIN system voice terminals may be installed in a near-by building by using
Outdoor Wiring Protection Units. Contact your equipment supplier for more information.
Basic Touch-Tone and rotary telephones may also be used as off-premises telephones
with the MERLIN system using the optional Off-Premises Telephone Interface to
connect them. In that case, off-premises telephones access system features by means
of dial codes.
The following pages describe in detail the control units (by model), optional cartridges and
line/voice terminal modules, voice terminals, and accessories.
5

CONTROL UNIT
The control unit provides power for most voice terminals and accessories. All outside lines
and all voice terminals and telephones connect to the control unit, which contains the
microprocessor and memory for all the advanced features available with the MERLIN
communications system.
NOTE: Page 7 explains in greater detail the physical features of the Models 206 and 410
control units. Since they are the same except for the number of outside line jacks and the
number of voice terminal jacks (Model 206 control unit has 2 outside line jacks and 6 voice
terminal jacks; Model 410 has 4 outside line jacks and 10 voice terminal jacks), only
Model 410 is pictured on page 7.
Model 206 Control Unit
Behind the removable front panel of the Model 206 control unit are 6 jacks for voice terminals
labeled 0 through 5, and 2 jacks for outside lines labeled A and B. On the right side are
horizontal slots for the three types of cartridges available to expand the MERLIN system’s
capabilities.
Outside
line jacks
Cartridge slots
Voice
terminal jacks
Model 410 Control Unit
Behind the removable front panel of the Model 410 control unit are 10 jacks for voice terminals
labeled 10 through 19, and 4 jacks for outside lines labeled A through D. The Model 410
control unit has horizontal slots on the right side for the three types of cartridges available to
expand the MERLIN system’s capabilities.
Outside
line jacks
Cartridge slots
Voice
terminal jacks
6

Physical Features of the Model 206 and 410 Control Units (Model 410 is pictured)
2 34 56 7
8
91
1.
2.
3.
4.
5.
6.
7.
8.
9.
Voice Terminals jacks: Jacks labeled 0 through 5 (Model 206) or 10 through 19 (Model
410) accommodate MERLIN system voice terminals.
Warning light (red): Comes on momentarily when the ac power cord is first plugged in.
If the warning light remains on, it can also indicate trouble.
Power light (green): Remains on to indicate that the ac cord is plugged in.
Option switches: For systems with standard features, set the switches labeled Ringing
to Yes to alert users of incoming calls or No so users are not alerted. With Feature
Package 1, an Outward Calls label is placed over the Ringing label. In this case, the
switches are set to Yes if the user can make outside calls, and to No if the user cannot.
With Feature Package 2, an Admin/Normal-Toll Prefix/Area Code label is placed over the
Ringing label. When the system is administered, the Admin/Normal switch is set to
Admin. The Toll Prefix/Area Code switch sets the system to expect a prefix “1” or “0”
before the area code on long-distance calls, or just the area code alone.
Tel. Co. Lines jacks: Jacks labeled A and B (Model 206) or A through D (Model 410)
provide connections for outside lines.
Tone/Pulse switch: Set to Tone for Touch-Tone service, and set to Pulse for rotary (dial
pulse) service.
Cartridge Type I slot: Accommodates feature packages that offer custom features (for
more information see page 10). Without a feature package the system has standard
features, as described in the standard features user’s guide.
Cartridge Type II slot: Accommodates cartridges that provide the system with audio
options such as connections for Music-on-Hold and paging systems (for more information
see page 11).
Cartridge Type III slot: Accommodates cartridges that give the system line-associated
options such as connections for Extra Alert Horns and Power Failure Transfer
Telephones (for more information see page 12).
7

Model 820 Control Unit
Behind the removable front panel of the Model 820 control unit is one line/voice terminal
module that accommodates 2 outside lines and 5 voice terminals. The Model 820 control unit
can accommodate up to four line/voice terminal modules for a maximum of 8 outside line
jacks and 20 voice terminal jacks (for more information on available types of modules, see
page 12). Positions reserved for additional modules have protective plastic covers. Model 820
has three horizontal slots on the right side for the cartridges available to expand the MERLIN
system’s capabilities.
Voice
terminal jacks
Cartridge slots
Outside
line jacks
Physical Features of the Model 820 Control Unit
10
11
12
13 14
9
8
7
6
5
4
3
15
16
2 1
8

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Tel. Co. Lines jacks: Jacks labeled A and B on the 2-Line/5-Voice Terminal Module
shipped with the control unit provide connections for outside lines.
Voice Terminals jacks: Jacks labeled 10 through 14 on the 2-Line/5-Voice Terminal
Module shipped with the control unit provide connections for MERLIN system voice
terminals.
AC power cord connector
On/Off power switch
Auxiliary Power Unit connector: Connects Auxiliary Power Unit needed for systems
with many accessories or 34-button deluxe voice terminals.
Switch not used.
Tone/Pulse switch: Set to Tone for Touch-Tone service, and set to Pulse for rotary
service with standard features and Feature Package 1.
Toll Prefix/Area Code switch: This switch is not used with standard features, or
Feature Package 1. For Feature Package 2, set to Toll Prefix if long distance calls are
made using the prefix “0” or “1,” otherwise, set to Area Code.
Admin/Normal switch: This switch is not used with standard features, or Feature
Package 1. With Feature Package 2, set to Admin whenever the control unit is
customized or administered, and to Normal for normal operation. However, the switch
can be set permanently to Admin without damage to the system. Setting it to Normal
simply prevents accidental system changes.
Warning light (red): Comes on momentarily when the ac power cord is first plugged in.
If the warning light remains on, it can also indicate trouble.
Power light (green): Remains on to indicate the ac cord is plugged in and the On/Off
switch is set to On.
2-Line/5-Voice Terminal Module: One module is shipped with control unit. It
accommodates five voice terminals and two outside lines. Up to four modules can be
used for a total of 8 lines and 20 voice terminals (for more information see page 12).
Additional modules: Positions reserved for additional line/voice terminal modules have
plastic covers. (Page 12 describes the three types of line/voice terminal modules that
can be added.)
Cartridge Type I slot: Accommodates feature packages that offer custom features (for
more information see page 10). Without a feature package the system has standard
features, as described in the standard features user’s guide.
Cartridge Type II slot: Accommodates cartridges that provide the system with audio
options such as connections for Music-on-Hold and paging systems (for more information
see page 11).
Cartridge Type III slot: Accommodates cartridges that give the system line-associated
options such as connections for Extra Alert Horns and Power Failure Transfer
Telephones (for more information see page 12).
9

TYPE I CARTRIDGES: FEATURE PACKAGES
A Type I cartridge occupies the top slot on the right side of the control unit. This cartridge
contains all the programming for the custom features of the MERLIN system. (Without this
cartridge, the system has standard features only.) The individual voice terminal has no
memory or programming capabilities itself. A voice terminal, when connected to the MERLIN
system, can be programmed to perform specific functions. However, the actual program
instructions are stored in the cartridge, not in the voice terminal. The cartridge may come with
a label that fits over the standard features or Ringing switches label. For example, Feature
Package 1 (Models 206 and 410 only) comes with the label Outward Calls.
For more specific information regarding the features provided by Type I cartridges, refer to the
administration manuals and user’s guides for Models 206, 410, and 820 that accompany the
cartridges.
Feature Package
CIB 2869
10

TYPE II CARTRIDGES: AUDIO OPTIONS
A Type II cartridge provides connections for such features as Loudspeaker Paging,
Background Music, and Music-on-Hold. It is installed in the second slot on the right side of
the control unit.
Pictured below is the Music-on-Hold/Paging Cartridge. A Music-on-Hold Type II cartridge with
only the Music-on-Hold feature is also available; this cartridge has only the M1 and M2
terminals and the Music-on-Hold volume control.
M1 and M2 terminals: Connect to
a music source to provide Music-
on-Hold and, if desired,
background music on the paging
system.
1 and 2 terminals: Connect to the
paging system to signal when a
page is in progress (for example, to
turn off the background music).
T and R terminals: Connect to the
telephone input on your paging
system. The connection allows
users to access the paging system
via the intercom from any voice
terminal.
Paging Signal On/Off switch:
When set to On, a tone precedes
all paging announcements. When
set to Off, no tone precedes the
paging announcement.
Background Music volume
control: Used to adjust the volume
of background music. Turning it
clockwise increases the volume
and turning it counterclockwise
decreases the volume.
Music-on-Hold volume control:
Used to adjust the volume of
Music-on-Hold. Turning it
clockwise increases the volume
and turning it counterclockwise
decreases the volume.
CIB 2870: Music-on-Hold Cartridge Type II
CIB 2871: Music-on-Hold/Paging Cartridge Type II
11

TYPE III CARTRIDGES: LINE-ASSOCIATED OPTIONS
A Type III cartridge provides line-associated options. It is installed in the third or last slot on
the right side of the control unit. Pictured below is the Extra Alert/2-Line Power Transfer
Type III cartridge.
Power Fail Lines jacks: Connect
two basic Touch-Tone or rotary
telephones for automatic backup
service in the event of a
commercial power failure.
Extra Alert jack: Connects a loud
bell or horn for noisy or remote
locations.
CIB 2872: Extra Alert/2-Line Power Failure Cartridge Type III
LINE/VOICE TERMINAL MODULES (Model 820 only)
The three types of modules that can expand the capacity of the Model 820 control unit are
shown below. One 2-Line/5-Voice Terminal Module which has voice terminal jacks labeled 10
through 14 and outside line jacks labeled A and B comes with each Model 820 control unit.
Up to four modules in any combination can occupy the vertical slots in the center of the
control unit.
2-Line/5-Voice 2-Line Module: 5-Voice Terminal
Terminal Module: Adds two outside Module: Adds five
Adds two outside lines, but no voice voice terminals, but
lines and five voice terminals. no outside lines.
terminals.
CIB 3002: 2-Line/5-Voice Terminal Expansion Module for Model 820
CIB 3012: 5-Voice Terminal Expansion Module for Model 820
CIB 3027: 2-Line Module for Model 820
12

OFF-PREMISES TELEPHONE INTERFACE TYPE C (Optional)
The Off-Premises Telephone Interface is optional. This unit connects off-premises telephones
to the MERLIN communications system, making the advanced features available to the off-
premises user. The unit can be mounted on the wall or placed near the control unit. Power is
supplied directly through the voice terminal module jack connection described below. There
must be a Type I cartridge in the control unit for this interface to operate.
To Voice Terminal Module jack:
Connection via a 4-pair cord is
made from this jack to a voice
terminal jack in the control unit.
The intercom number of the off-
premises telephone is determined
by the voice terminal jack to which
this unit is connected:
Off-Premises Line Input jack:
Off-premises outside line connects
via 2-pair wire directly to this input.
Power light: Remains on when
power is on.
CIB 3009
13

VOICE TERMINALS
Several types of voice terminals may be connected to Models 206, 410, and 820. They are
distinguished from one another by the number of silver membrane buttons above and to the
right of the dial pad. These buttons give access to lines and features; most buttons are
programmable. The operation of each voice terminal can be customized by programming
different features to these buttons. (The individual voice terminal has no memory or
programming capabilities by itself, however. Actual program instructions are stored in the
Type I cartridge of the control unit.) Refer to the administration manual and user’s guides for
Models 206, 410, and 820 for more information about individual voice terminals if you have a
Type I cartridge. The illustration below shows examples of available voice terminals.
5-Button Voice Terminal 10-Button Voice Terminal
34-Button Voice Terminal 34-Button Deluxe Voice Terminal
14

OPTIONAL EQUIPMENT
In addition to the essential components of the MERLIN communications system, several
different accessories may be connected to voice terminals or the control unit.
Optional Voice Terminal Accessories
Hands-Free Units, Headset Adapters, and Manual Multipurpose Adapters can be connected
directly to the underside of the voice terminal as illustrated below. An externally connected
Voice Terminal Power Supply can also be added.
Line jack: Connects to control unit
via modular voice terminal cord.
This jack is not to be used for
voice terminal accessories.
“Other” jack: Connects to
optional voice terminal accessories
described in this section via a
special voice terminal accessory
cord (blue tips). This jack is
usually covered by an adhesive-
backed paper label.
Hands-Free Unit (HFU)
The Hands-Free Unit provides speakerphone capability; making it possible to place and
receive outside and intercom calls without using the voice terminal handset. The HFU, shown
below, can be used with 10-button or 34-button voice terminals.
Voice terminal accessory cord:
Connects to “Other” jack on voice
terminal.
Speakerphone light: Lights when
speakerphone is in use.
Speakerphone switch: Turns unit
on and off.
Microphone light: Goes on when
microphone is in use.
Volume control
Microphone switch: Turns
microphone on and off for “mute”
function.
CIB 2864
15

Headset Adapter
The Headset Adapter makes it possible to use a headset with a 10-button or 34-button voice
terminal.
Headset light: Goes on when
headset is in use.
On/Quiet switch: Turns adapter
sound on; when held down,
provides “mute” function.
Off switch: Turns adapter sound
off.
Jack: Connects headset equipped
with 2-prong plug.
Front and Top
Jack: Connects voice terminal
accessory cord to “Other” jack on
voice terminal.
Jack: Connects headset equipped
with modular plug.
Back
CIB 2867
Voice Terminal Power Supply (Model 820 only)
A Voice Terminal Power Supply provides extra power to 34-button deluxe voice terminals and
attendant consoles. The power supply plugs into an ac outlet not controlled by a switch. A
cord (included with the power supply) connects it to one jack of a 2-jack adapter (also
included). The modular terminal cord from the voice terminal plugs into the other jack on the
adapter. The adapter has a plug end that connects to a modular jack mounted near the voice
terminal.
Plug: Connects to ac outlet.
Output jack: Connects cord to
Z400F Adapter.
CIB 3007
16

Manual Multipurpose Adapter
The Manual Multipurpose Adapter (illustrated below) permits these devices to be connected to
a voice terminal:
●
●
●
●
●
●
Modems and data terminals with built-in modems. (An extra telephone is not needed with
an AT&T 212A-type modem with a special cable. Automatic answering modems cannot be
used.)
Basic Touch-Tone or rotary telephones.
Speakerphones and conference phones.
Touch-Tone automatic dialers.
Cordless telephones.
Facsimile machines.
Voice light: Goes on when
modular connector on back is
active.
Voice switch: Pressed to access
devices attached through the
modular jack on the back.
Data switch: Pressed to access
the 212A-type modem connector
on the back; deactivates the
modular jack on the back.
Data light: Goes on when 212A-
type modem connector is active.
Top
2-pair modular jack: Connects
the devices listed above.
25-pair connector: Connects
212A-type modems.
Jack: Connects cord to the
“Other” jack on the voice terminal.
Back
CIB 3008
17