AT&T MERLIN LEGEND Service manual

AT&T
MERLIN LEGENDTM
Communications System
Pocket Reference

Copyright © 1991 AT&T
AT&T 555-610-141
All Rights Reserved
Issue 1
Printed in U.S.A
August 1991
Ordering Information
To order copies of this document:
Call:
AT&T Customer Information Center on 800-432-6600;
In Canada, call 800-255-1242
Write: AT&T Customer Information Center
2855 North Franklin Road
P.O. Box 19901
Indianapolis, Indiana 46219-1385
For assistance when installing or programming the system:
Call:
National Service Assistance Center (NSAC) at
800-628-2888 or your authorized AT&T dealer
Notice
While reasonable efforts were made to ensure that the information
in this document was complete and accurate at the time of
printing, AT&T can assume no responsibility for errors. Changes
or corrections to the information in this document maybe
incorporated into reissues.
Trademarks
Accunet is a registered trademark of AT&T.
AUDIX is a trademark of AT&T.
Definity is a registered trademark of AT&T.
Magic on Hold is a registered trademark of AT&T.
Megacom is a registered trademark of AT&T.
MERLIN is a registered trademark of AT&T.
MERLIN LEGEND is a trademark of AT&T.
MERLIN MAIL is a trademark of AT&T.
MLX-20L, MILX-10D, MLX-10, and MLX-28D are trademarks of
AT&T.
SYSTIMAX is a trademark of AT&T.

ERRATA
MERLIN LEGEND™ Communications System
Pocket Reference
555-610-141
Ignore all references to the small processor module. The MERLIN LEGEND™ Communication
System offers only one processor module. This processor module is referred to as a
large processor
module in this document.
.
Page 2
Backboard Requirements: References to “Small system” should read “One expanison carrier” and
references to “large system” should read “Two expansion carriers.”
Pages 7-13
Hardware and software Parameters Table:
Ignore the columns headed “Small.”
Page 14
Ordering Codes Table:
The following Price Element Codes are not valid:
Small (Analog) - 6141-CUA
Small (Digital) - 6141-CUD
Small (Digital) - 6141-24D
Page 15
Ordering Codes Table:
The following Price Element Code (PEC) is not valid:
Upgrade from Small to Large - 6140-USLA
Page 31
Memory Sizes:
Ignore reference to small processor module.
October 1, 1991

Table of Contents
Design Benefits
Environmental Requirements
Control Unit Interfaces
Network Interface Requirements
FCC Registration
DOC Registration
Hardware and Software Parameters
Ordering Codes
Control Unit Modules
Adjunct Summary
Uninterruptible Power Source (UPS) Backup Times
Power Supply Unit Load Requirements
■ Unit Load Calculation Rules
■ Unit Load Rating of System Modules
■ Unit Load Rating of System Lines,
Telephones, and Adjuncts
System Features
Telephone and Operator Console Features
Reference Documents
1
2
4
5
6
6
7
14
30
38
48
49
49
51
52
53
56
70
i

Design Benefits
Modular components allow easy, cost-effective growth in both
size and function. For upgrades from the MERLIN® system family
of products, all analog MERLIN system telephones, as well as
wiring, can be reused. For upgrades from MERLIN II, certain
line/trunk and station modules can also be reused.
Menu-driven system programming maintains the customer’s
command of business operations.
Built-in 1200-bps modem allows fast access to the system by
customers, AT&T personnel, or authorized dealers from a remote
location for system programming and maintenance.
Flexible mode of operation saves upgrade costs by allowing
system configuration in one of three modes: Key, Behind Switch,
and Hybrid/PBX.
Connectivity to other systems in the Behind Switch mode
optimizes existing resources by permitting the system to work as
part of another MERLIN LEGEND™ Communications System,
System 25, System 75, System 85, Definity® 75/85, or other
communications systems. Also, the system control unit can
connect to another system’s control unit by using an off-premises
telephone (OPT) line, an analog tie trunk, or a digital tie trunk.
Digital 2.048-MHz bus supplies a 64-kbps channel on each of
the 216 time slots.
68000 Motorola CPU running at 10 MHz with zero wait states
provides fast system performance.
Memory data retention saves time by ensuring that system and
station programming information is retained for 12 to 30 days,
depending on the system configuration, in case of power failure or
system shutdown.
Integrated voice and data capabilities allow users to converse
while transmitting data at speeds up to 64 kbps.
DS1 interface can be configured for connection of either T1 or
ISDN for basic call control with the AT&T 4ESS PRI service
specifications.
ISDN S/T BRI protocol supports premier digital multiline
telephones (MLX) with superior display capabilities and supports
the ISDN 7500B Data Module for the connection of adjuncts.
Page 1

Environmental Requirements
Control Unit
Fully loaded basic carrier 45 lbs
14” W x 23” H x 12” D
Fully loaded 2-carrier 90 Ibs 25” W x 23” H x 12” D
Fully loaded 3-carrier 135 Ibs 37” W x 23” H x 12” D
Mean Time Between Failures
2.1 years
(mean or average time the
product/system is expected
to operate before any type of
failure occurs)
Mean Time Between Outages
4.0 years
(mean or average time the system
is expected to operate before a
failure affecting more than 25%
of stations or lines for more than
15 seconds occurs)
Backboard
Without SYSTIMAX™
■ Small system
4’ W x 3’ H x 3/4” D
■ Large system
6’ W x 3’ H x 3/4” D
With SYSTIMAX
■ Small system
5’ W x 4’ H x 3/4” D
■ Large system
7’ W x 4’ H x 3/4” D
Backboard Mounting Hardware Requirements
Wood surface
Wood screws
Concrete surface, brick, cinder block Masonry anchors
Plaster, plasterboard
Toggle bolts
Sheet-metal surface Sheet-metal screws
■ Hardware should have a combined pullout force of 650 Ibs.
■ When mounting to sheet-metal walls, attach to structural
members.
Location
■ Within 5 ft of dedicated AC power outlet (1 plug per carrier)
■ Within 1000 cable feet of telephones
Heat Dissipation
Fully loaded basic carrier 500 Btu/hr
Fully loaded 2-carrier 1000 Btu/hr
Fully loaded 3-carrier 1500 Btu/hr
Power Requirements
Basic carrier 117 VAC
60 Hz ± 5% 3A
2-carrier 117 VAC
3-carrier 60 Hz ± 5% 6A
117 VAC
60 Hz ± 5% 9A
Page 2

Environmental Requirements (continued)
Temperature Humidity Range
40°–104°F; 4–40°C (optimum temperature 60°F)
20%-80% relative humidity
Ventilation
1” on left side; 1” on right side; 12” above; 12” below
Cautions
■ Do not use switch control on AC outlet for control unit.
■ Use approved ground (AC receptacle for 3-prong plug).
■ Do not install control unit outdoors.
■ Do not place control unit near extreme heat (furnaces, heaters,
attics, or direct sunlight).
■ Do not expose control unit to devices that generate electrical
interference (such as arc welders or motors).
■ Do not place anything on top of carriers.
■ Do not install control unit under any device that may drip fluid,
such as an air conditioner.
Page 3

Control Unit Interfaces
Signaling
Audio/
Channel
Data
Interface
Applications
Rate Rate
ISDN-BRI
Digital switch to MLX 16 kbps
S/T*
telephones (D);
64 kbps
(B)
Digital switch to ISDN
64 kbps
7500B Data Module (B and D)
DS1
Switch to the
64 kbps
following services
■ T1 — Emulated tie
trunk, loop-start,
and ground-start
■ ISDN-PRI services
Accunet®
switched
digital service,
Megacom®
WATS,
Megacom® 800,
Software Defined
Network (SDN)
RS-232C
Switch to PC
2400 bps
2400
connected to system
or
bps
programming
1200 bps or
RS-232C port
1200
bps
Switch to AT&T model 1200 bps
1200
572 printer, PC
bps
with CAS, or CAT
connected to
RS-232C port
* Call handling derived from CCITT recommendation Q.931
Page 4

Control Unit Interfaces (continued)
Signaling
Audio/
Channel
Data
Interface
Applications Rate Rate
ATL
Digital switch to
40 kHz
300-
analog multiline
3400 Hz
telephones
Network Interface Requirements
Facility Interface Network
Line/Trunk Type
Code
Interface
Loop-start 02LS2
RJ11C, RJ14C,
RJ21X
Ground-start
02GS2
RJ11C, RJ14C,
RJ21X
Direct Inward 02RV2-T RJ11C, RJ14C,
Dialing
RJ21X
Off-premises 0L13C
RJ11C, RJ14C
telephone
Tie line TL31M
RJ2GX
T1
04DU9-B
RJ48C/X
04DU9-C
ISDN-PRI
04DU9-B
RJ48C/X
04DU9-C
Page 5

FCC Registration
Registration Number REN Type
AS593M-72682-MF-E 1.5A Multi-function
AS593M-72914-KF-E
1.5A Key only
DOC Registration
DOC Certification No. CSA Certification No.
230-4095A LR-56260
Load No.
6
Page 6

Hardware and Software Parameters
Item
Small Large
Allowed lists
Number of lists
88
Entries per list
10
10
Digits per entry
77
Applications
CAS 1
1
CAT
11
CMS
22
Number of lines/trunks (each)
28 28
Number of agents (each)
28 28
Number of external alerts (each)
4
4
Integrated Solution II
AUDIX Voice Power-lS II
1*
1*
Number of mailboxes (each)
300 300
Integrated Voice Power
Automated Attendant
1*
1*
Call Accounting System-lS II 1
1
System Programming and
Maintenance–IS II
1
1
MERLIN Attendant
4
4
MERLIN MAIL™ Voice Messaging
System
44
Number of mailboxes (each)
40
40
System Programming
and Maintenance–DOS
11
Automatic Route Selection
Fully programmable ARS tables
16 16
Entries per table
100 100
Entries across all tables
1600 1600
ARS patterns
18 18
Subpatterns per pattern
2
2
Routes per subpattern
66
Default tables
4
4
* AUDIX Voice Power-lS II and Integrated Voice Power
Automatic Attendant cannot be connected simultaneously.
Page 7

Hardware and Software Parameters (continued)
Item
Small Large
Callback calls in queue 64
64
Calling Groups
Number of groups 32
32
Members per group*
20 20
Groups per member
1
1
Delay announcements per system
32 32
Delay announcements per group
1
1
Groups per delay announcement
32
32
External alerts per group
1
1
Coverage groups per group
1
1
Carriers
Slots per basic carrier
†
55
Slots per expansion carrier
6
6
Carriers per system 3
3
Total slots available
17‡ 17
Coverage Groups
Number of groups
32
32
Senders per group 56
144
Groups per sender
1 1
Receiver buttons per group
§
8
8
Groups per QCC receiver 30
30
* QCCs cannot be members.
† The processor module must be placed in slot 00 in the basic
carrier.
‡ Software limits on the number of lines/trunks and stations
usually limit the number of carriers in a small system to 2 and
therefore the number of slots to 11.
§ For Hybrid/PBX systems, when queued call consoles (QCCs)
are used, the queue can also be assigned as a receiver but is
not counted in the 8-receiver maximum.
Page 8

Hardware and Software Parameters (continued)
Item
Small
Large
Data hunt groups
Number of groups
32 32
Members per group
20
20
Groups per member
1
1
Digital data via ISDN 7500B Data Module 24
127
Direct Inward Dialing
Number of blocks
22
Number of trunks 24
80
Directories
System Directory (System Speed Dial)
Number of directories
1 1
Listings per directory
40 130
Extension Directory
Number of directories
11
Listings per directory
56
144
Personal Directory
Number of directories
16
48
Listings per directory
50
50
Direct Station Selectors*
12
16
Disallowed Lists
Number of lists
88
Entries per list
10
10
Digits per entry
11
11
DS1 modules
1 3
Fax machines with Message Waiting
16†16†
* Two per MLX module; the analog multiline display console has
a built-in DSS.
† The system can support more than 16 fax machines, but those
in excess of 16 cannot use the fax message-waiting indication.
Page 9

Hardware and Software Parameters (continued)
Item
Small
Large
Lines/trunks*
24 80
Night Service
Groups
88
Members per group
56 144
Groups per member
88
Emergency Allowed List entries
10 10
Operator Consoles
Direct-line consoles (DLCs)
MLX-20L™ or MLX-28D™
†68
BIS-22D, BIS-34D, or System Display
Console
‡
88
QCCs†44
Combination of DLCs and QCCs
88
Number of consoles per module
22
Paging system ports (loop-start only)
33
Park codes
88
Personal lines
56
64
Personal Speed Dial
§
Entries per single-line or 5- or 10-button
telephone
24
24
Entries per system 880
1200
Digits per entry
16 16
Pickup
Number of groups
30
30
Members per group 15 15
Groups per member
1
1
* Lines/trunks can be configured as personal lines.
† Two per MLX module.
‡ Two per analog module.
§ Single-line and 5- or 10-button telephones only.
Page 10

Hardware and Software Parameters (continued)
Item Small Large
Pools (trunk groups)
Maximum number of pools
11 11
Maximum number of trunks in a pool 24 80
Pool buttons 56 64
Ports (not achievable simultaneously)
Delay announcements
32 32
Digital data via ISDN 7500B
Data Module 24
127
Paging
33
Voice and data (physical ports) 56 144
Voice Announce to Busy stations
28 127
Voice-mail interface* 20 20
Total ports†
80
224
Power failure transfer telephones
620
* Although the system software supports up to 24 voice mail
interface (VMI) ports, all the VMI ports must be in the same
calling group, and the maximum number of stations in a calling
group is 20.
† The large system is said to have a total capacity of 224 (80 CO
lines/trunks plus 144 stations). However, these are physical
jacks. Each MLX station jack represents 2 logical endpoints
(ports). For example, an MLX telephone with a Multi-Function
Module (MFM) plugs into only 1 station jack, but the jack
supports the telephone and whatever is connected to the MFM
(fax machine, answering machine, etc.). The 1 station jack is
supporting 2 endpoints.
Although it has only 1 jack, the 100D module can serve up to
24 endpoints. Therefore, the entire large system can be
configured to connect up to 80 lines/trunks and 255 station
endpoints, a total of 335 endpoints.
This total of 335 endpoints exceeds the system’s capacity of
216 time slots. If more than216 endpoints are in use at the
same time, blocking can occur.
Page 11

Hardware and Software Parameters (continued)
Item
Small
Large
Remote Access
Number of barrier codes
16
16
Digits per code 4
4
Shared System Access (SA) buttons
Number of shared buttons per SA
16
16
Stations
Total physical jacks 56
144
Total endpoints
56
255
System programming equipment*
MLX-20L™
1
1
RS-232 port for PC with SPM
1
1
Modem
1
1
Telephones
Analog multiline without Voice
Announce to Busy 56
136
Analog multiline with Voice
Announce to Busy
28
127
MLX-20L†
16
48
MLX-10,™ MLX-10D,™ or MLX-28D
(with or without ISDN 7500B Data
Module or Multi-Function
Module)‡
24
127
Single-line
56
144
* Remote system programming overrides on-site system
programming unless an on-site backup or restore procedure is
taking place. The system sends a message that a remote
connection is established before terminating an on-site system
programming session.
† Total includes the MLX-20L telephone used for system
programming.
‡ An MFM and an ISDN 7500B Data Module cannot be
connected to the same telephone at the same time.
Page 12

Hardware and Software Parameters (continued)
Item
Small
Large
Traffic
Hundred call seconds (CCS) per hour
per station
7.0 6.0
Two-party conversations 40
108
Page 13

Ordering Codes
Component PEC
Comcode App
Control Unit
Small (Analog)
Basic carrier and housing
Power supply module
Processor (small)
Feature module (small)
408 GS/LS
Small (Digital)
Basic carrier and housing
Power supply module
Processor (small)
Feature module (small)
008 MLX
800 GS/LS
Small (Digital)
Basic carrier and housing
Power supply module
Processor (small)
Feature module (small)
008 MLX (3)
800 GS/LS
400 GS/LS/TTR
Large
Basic carrier and housing
Power supply module
Processor (large)
Feature module (large)
Upgrade from Mll to
Large (Digital)
Cover
Processor (large)
008 MLX
Feature module (large)
MLX-20L telephone (choose one):
Black
White
Expansion cover
(zero, one, or two)
6141-CUA
6141-CUD
6141-24D
6140-CUL
6140-UDLA
106388614
105743801
105711972
105711998
106064678
106388614
105743801
105711972
105711998
105628010
105627996
106388614
105743801
105711972
105711998
105628010
105627996
105627988
106388614
105743801
106215155
106064660
403E
391A1
517A23
517A24
517A26
403E
391A1
517A23
517A24
517A21
517A19
403E
391A1
517A23
517A24
517A21
517A19
517A18
403E
391A1
517A27
517A25
106388234 16A
106215155 517A27
105628010 517A21
106064660 517A25
105685465 7713DO1A-
003
105685473 7713DO1A-
264
106388259 17A
Page 14

Ordering Codes (continued)
Component PEC
Comcode App
Upgrade from MII to Large
Cover
Processor (large)
Feature module (large)
Expansion cover
(zero, one, or two)
Upgrade from Small to Large
Processor (large)
Feature module (large)
Expansion Unit
Expansion carrier and housing
Power supply module
Expansion Unit Cover
6140-UULA
106388234
106215155
106064660
106388259
6140-USLA 106215155
106064660
61490 106388630
105743801
n/a 106388259
16A
517A27
517A25
17A
517A27
517A25
403F
391A1
17A
Line/Trunk and Station Modules
008 (ATL) 61485
008 MLX 61486
008 OPT
61489
012 (T/R) 61487
100D (DS1) 61491
400EM (tie trunk)
8303-200
400 GS/LS/TTR 61483
408 GS/LS 61481
800 DID
61488
800 GS/LS 61484
105351092
105628010
106387525
106397631
105461560
105311401
105627988
106064678
105628002
105627996
51703
517A21
517A28
517E13
517B15
517A14
517A18
517A26
517A20
517A19
Vintage Line/Station Modules
400 (with TTRs)
61379 105408892 517B12
408 LS
61482 105512495 517C1
800 LS 61384 105351100 517B4
Telephones
Digital/ISDN Multiline Telephones
MLX-10 (black)
3156-02B 105685440 7712D01A-
003
MLX-10 (white)
3156-02W 105685457 7712DOlA-
264
Page 15

Ordering Codes (continued)
Component PEC
Comcode App
Digital/ISDN Multiline Telephones, continued
MLX-10D (black) 3156-03B
MLX-10D (white) 3156-03W
MIX-20L (black)
3156-05B
MIX-20L (white) 3156-05W
MLX-28D (black) 3156-04B
MLX-28D (white) 3156-04W
Analog Multiline Telephones (black)
MLC-5
3168-MLC
BIS-10 3165-10B
BIS-22
316W28
BIS-22D
3166-DSB
BIS-34
3167-34D
BIS-34D
3167-DSB
Vintage Analog Multiline Telephones (black)
5-Button
3160-111
10-Button 3161-172
10-Button HFAI
3161-161
34-Button 3162-412 B-003
34-Button Deluxe 3162-417
D-003
34-Button BIS
3162-BIS
34-Button BIS/DIS
3162-DIS
105688303
105688311
105685465
105685473
105688329
105688337
105515332
105161061
105188809
105630420
105167027
105630529
105217426
105217509
105371942
103842050
105217715
103981965
103981981
7712D02A-
003
7712D02A-
264
7713D01A-
003
7713D01A-
264
7713D02A-
003
7713D02A-
264
7312H01A-
003
7313H01A-
003
7314H01A-
003
7315H01B-
003
7317H01A-
003
7317H01B-
003
Z7302H01
D-003
Z7303H01
D-003
Z7309H01
C-003
Z7305H01
Z7305H02
Z7305H03
D-003
7305H04C-
003
Page 16