Nortel DMS-100 Series User manual

BASE12 Standard 06.01 August 1999
297–1001–122
DMS-100 Family
Alarm System Description
Reference Manual

DMS-100 Family Alarm System Description Reference Manual BASE12
DMS-100 Family
Alarm System Description
Reference Manual
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Information is subject to change without notice. Nortel Networks reserves the right to make changes in design or components
as progress in engineering and manufacturing may warrant.
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC
Rules, and the radio interference regulations of Industry Canada. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at the user’s own expense.
The SL-100 system is certified by the Canadian Standards Association (CSA) with the Nationally Recognized Testing Laborato-
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Service Improvement Act of 1990 and Part 68 of the FCC Rules.
DMS
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Networks Corporation.
Publication number: 297–1001–122
Product release: BASE12
Document release: Standard 06.01
Date: August 1999

DMS-100 Family Alarm System Description Reference Manual BASE12
iii
Publication history
August 1999BASE12 Standard 06.01
•document converted to interleaf format
•corrected titles of NTPs referenced in this document
•consolidated information on each alarm system version into separate
chapters
•added a chapter for the Low Power DMS Alarm System
•added an index
May 1992 BCS33 Standard 05.01
•added information on the Enhanced Alarm System (EAS)
•changes to the titles of NTPs referenced in this document

DMS-100 Family Alarm System Description Reference Manual BASE12
v
Contents
About this document ix
How to check the version and issue of this document ix
References in this document ix
What precautionary messages mean x
How commands, parameters, and responses are represented xi
Input prompt (>) xi
Commands and fixed parameters xi
Variables xi
Responses xi
Introduction 1-1
Office Alarm System 1-2
Office Alarm System versions 1-2
Office alarm unit 1-2
Alarm detection 1-3
Alarm indication 1-5
Alarm classes 1-6
Table control 1-6
References 1-7
Office Alarm System Version 1 2-1
Version 1 OAS hardware and alarm indication devices 2-1
Office alarm unit 2-1
MTM alarm system circuits 2-4
Alarm crosspoint field shelf 2-4
External alarms panels 2-6
Alarms 2-6
Office alarm unit 2-6
Office Alarm System Version 2 3-1
Version 2 OAS hardware and alarm indication devices 3-1
Office alarm unit 3-1
MTM alarm system circuits 3-3
Alarm cross-connect unit panel 3-3
Alarm control and display panel 3-3
External alarms panels 3-6
Alarms 3-6
Office alarm unit (OAU) 3-6
Version 2 OAS equipment combinations 3-7

vi Contents
297–1001–122 Standard 06.01 August 1999
OAS Version 2 Enhanced Alarm System 4-1
EAS features 4-1
EAS hardware and alarm indication devices 4-2
Office alarm unit 4-2
MTM alarm system circuits 4-4
Alarm cross-connect unit panel 4-4
Audible alarms 4-4
Visual alarm indications and manual controls 4-5
ACD panel with common audible alarm 4-6
Alarm display panel 4-7
Exit alarm panel 4-8
Equipment aisle visual alarms 4-9
Alarm extension circuits 4-9
Power distribution frame upgrades 4-10
Office Alarm System features 4-10
Low Power Alarm system 5-1
Office alarm system 5-1
Low Power Alarm system 5-2
Low Power Alarm System features 5-2
Low Power Alarm system components 5-3
Alarm and control circuits 6-1
Alarms 6-1
Office alarm unit alarms 6-1
Dead system alarm (DSA) 6-1
FSP/MSP alarms 6-5
Power distribution center (PDC) alarms 6-6
Low voltage and power loss alarm circuits 6-6
Low battery voltage detection circuit 6-6
Low power alarm system 6-7
A and B feed loss detection circuit 6-8
Remote alarm contacts 6-8
Audible alarm reset 6-8
Trunk test center (TTC) alarms 6-9
Test line alarm 6-9
Trunk group alarm 6-9
Trunk test center night alarm transfer 6-10
Remote alarm transfer 6-10
Dead system alarm sending 6-11
Alarm grouping 6-11
Alarm power supplies 6-12
OAS Version 1 6-12
OAS Version 2 6-13
Loop closure 6-13
Local talk line circuit 6-13
OAS Version 1 6-14
OAS Version 2 6-14
Data loop system 6-14
Alarm sending and checking system 6-15

Contents vii
DMS-100 Family Alarm System Description Reference Manual BASE12
Remote site alarms 6-17
RLM alarm extension circuit 6-17
Centralized alarm reporting 6-18
List of acronyms 7-1
ABS 7-1
ACD 7-1
ANI 7-1
ASCS 7-1
CAMA 7-1
CC 7-1
CCIS 7-1
DF 7-1
DMS 7-1
DOC 7-1
DSA 7-1
EAS 7-2
Ext 7-2
FSP 7-2
IOC 7-2
IPM 7-2
ISM 7-2
LPA 7-2
MAP 7-2
MDF 7-2
MTM 7-2
OAS 7-2
OAU 7-2
PDC 7-2
PM 7-2
RLM 7-3
SD 7-3
STP 7-3
TOPS 7-3
TTC 7-3
TTP 7-3
UI 7-3
VDU 7-3
Index 8-1

DMS-100 Family Alarm System Description Reference Manual BASE12
ix
About this document
This document decribes the DMS alarm subsystem. The DMS alarm
subsystem is part of the BASE platform in all markets. The DMS alarm
subsystem is part of the following DMS-based product lines:
•DMS-100/200/250/300/500
•MSL-100
•MTX
•STP
How to check the version and issue of this document
The version and issue of the document are indicated by numbers, for
example, 01.01.
The first two digits indicate the version. The version number increases each
time the document is updated to support a new software release. For
example, the first release of a document is 01.01. In the next software
release cycle, the first release of the same document is 02.01.
The second two digits indicate the issue. The issue number increases each
time the document is revised but rereleased in the same software release
cycle. For example, the second release of a document in the same software
release cycle is 01.02.
This document is written for all DMS-100 Family offices. More than one
version of this document may exist. To determine whether you have the
latest version of this document and how documentation for your product is
organized, check the release information in Product Documentation
Directory, 297-8991-001.
References in this document
The following documents are referred to in this document:
•DMS-MTX Alarm System Description, 297-2131-122
•Provisioning Guide, 297-1001-450
•Maintenance System DMS-100/200, 297–1001–106

x About this document
297–1001–122 Standard 06.01 August 1999
•DMS 100/200 Product Computing Module Load (PCL) Release
Document, PLN-8YYY-004
•Network Management System Reference Manual, 297-1001-453
•Maintenance System Man-Machine Interface Description,
297-1001-520
•External Devices Maintenance Guide, 297-1001-593
•Trunks Maintenance Guide, 297-1001-595
•Translations Guide
•Hardware Description Reference Manual, 297-8991-805
What precautionary messages mean
The types of precautionary messages used in NT documents include
attention boxes and danger, warning, and caution messages.
An attention box identifies information that is necessary for the proper
performance of a procedure or task or the correct interpretation of
information or data. Danger, warning, and caution messages indicate
possible risks.
Examples of the precautionary messages follow.
ATTENTION Information needed to perform a task
ATTENTION
If the unused DS-3 ports are not deprovisioned before a DS-1/VT
Mapper is installed, the DS-1 traffic will not be carried through the
DS-1/VT Mapper, even though the DS-1/VT Mapper is properly
provisioned.
DANGER Possibility of personal injury
DANGER
Risk of electrocution
Do not open the front panel of the inverter unless fuses
F1, F2, and F3 have been removed. The inverter contains
high-voltage lines. Until the fuses are removed, the
high-voltage lines are active, and you risk being
electrocuted.
WARNING Possibility of equipment damage

About this document xi
DMS-100 Family Alarm System Description Reference Manual BASE12
WARNING
Damage to the backplane connector pins
Align the card before seating it, to avoid bending the
backplane connector pins. Use light thumb pressure to
align the card with the connectors. Next, use the levers on
the card to seat the card into the connectors.
CAUTION Possibility of service interruption or degradation
CAUTION
Possible loss of service
Before continuing, confirm that you are removing the card
from the inactive unit of the peripheral module.
Subscriber service will be lost if you remove a card from
the active unit.
How commands, parameters, and responses are represented
Commands, parameters, and responses in this document conform to the
following conventions.
Input prompt (>)
An input prompt (>) indicates that the information that follows is a
command:
>BSY
Commands and fixed parameters
Commands and fixed parameters that are entered at a MAP terminal are
shown in uppercase letters:
>BSY CTRL
Variables
Variables are shown in lowercase letters:
>BSY CTRL ctrl_no
The letters or numbers that the variable represents must be entered. Each
variable is explained in a list that follows the command string.
Responses
Responses correspond to the MAP display and are shown in a different type:

xii About this document
297–1001–122 Standard 06.01 August 1999
FP 3 Busy CTRL 0: Command request has been submitted.
FP 3 Busy CTRL 0: Command passed.
The following excerpt from a procedure shows the command syntax used in
this document:
Manually busy the CTRL on the inactive plane by typing
>BSY CTRL ctrl_no
and pressing the Enter key.
where
ctrl_no is the number of the CTRL (0 or 1)
Example of a MAP response :
FP 3 Busy CTRL 0: Command request has been submitted.
FP 3 Busy CTRL 0: Command passed.
1

DMS-100 Family Alarm System Description Reference Manual BASE12
1-1
Introduction
The DMS alarm (sub)system performs the following functions:
•generates audible and visual indications of alarm conditions detected in
the DMS switch and related equipment. These alarm indications alert
maintenance personnel and help in the identification and location of
alarm conditions.
•provides the capability to do the following:
— silence audible alarms
— transfer alarm signals to a remote monitoring location
— combine the alarms of a DMS office with those of other systems on
other floors
— transfer alarms from an unattended trunk test center (TTC) to the
main DMS alarm system
— control the office data loop circuit
•provide a dead system alarm that the hardware generates to alert
maintenance personnel when the DMS system software does not
function
•provide miscellaneous circuits that can include the following (if
required):
— office talk and data loop circuits
— 130 V power supply for the remote alarm transfer circuit
Note: The 130V power supply is not required for the Low Power
Alarm (LPA) system. For more information, refer to DS3X83BA.
— 20-Hz ac ringing supply for the audible alarm subsets
Note: The 20-Hz ringing supply is not part of the LPA system. If
you require this supply, you require the NT0X66AC change
application kit.

1-2 Introduction
297–1001–122 Standard 06.01 August 1999
•provide circuits between the dead system alarm (DSA) cards and the
network management (NWM) control for automatic level 3 dynamic
overload control signaling (SDOC3). These circuits include automatic
SDOC3 cutoff when performance of DSA maintenance occurs.
•provides an inactive timing circuit (IATC) clock to monitor and report
the duration of a dead system alarm (DSA) condition in an office. The
IATC is also called the inactive system timer (IAST)
Note 1: Nortel provides a change application kit (NT0X66AC) for
backwards compatibility to older mechanical unique audibles panels.
Note 2: For a description of Mobile Telephone Exchange (MTX) alarm
system feature refer to DMS-MTX Alarm System Description.
Office Alarm System
The Office Alarm System (OAS) consists of the following:
•alarm software
•maintenance trunk modules (MTM), service trunk modules (STM), or
integrated service modules (ISM) that contain the primary and standby
office alarm units (OAU)
Note: The standby OAU is also called the standby MTM or standby
ISM.
•various other alarm system hardware devices
Office Alarm System versions
The following versions of the OAS exist:
•Version 1
•Version 2
•Version 2 Enhanced Alarm System (EAS)
•Low Power Alarm system
The various OAS versions are described in detail in the following chapters.
Office alarm unit
The OAU is an MTM, STM (compact MTM), or ISM shelf equipped with a
transmission, a processor, a control, and a power converter card. The OAU
also has slots for up to 12 office alarm circuit, signal distribution, and scan
detector cards.
The primary and standby OAUs connect to each other through the alarm
crosspoint unit (AXU) and the main distribution frame (MDF). The AXU
also connects the primary and standby OAUs to other components of the
OAS. Figure 1-1 shows the major hardware components of the OAS and
their shelf locations (in inches from the floor).

Introduction 1-3
DMS-100 Family Alarm System Description Reference Manual BASE12
Figure 1-1xxx
Alarm system hardware
TME 00
04
18
32
45
51
65 Alarm crosspoint unit
Office alarm unit
FSP
TME 01
Standby MTM or ISM
FSP
04
18
32
45
51
65
Maintenance trunk module
The MTM is a peripheral module, provisioned in a trunk module equipment
(TME) frame, that you can equip as an OAU or a standby MTM.
Service trunk module
The service trunk module is a PM that consists of two compact MTMs. The
STM can contain an OAU or a standby MTM.
Integrated services module (ISM)
The integrated services module is a single shelf that replaces the trunk
module (TM) or the maintenance trunk module (MTM) shelf. The ISM
shelf mounts on a cabinetized ISM (CISM) or ISM equipment (ISME)
frame.
Alarm detection
The alarm system software does the following:
•reports system integrity (soft) alarm conditions to the OAS hardware
•monitors and controls alarm system hardware
To respond to reported hardware alarm conditions and to provide control
inputs, the alarm system software operates or releases affected signal
distribution (SD) points in the alarm system hardware. SD points can be
physically connected to visual alarm, audible alarm, and telephony circuits
as defined in the OAS software and as provisioned by the operating
company.

1-4 Introduction
297–1001–122 Standard 06.01 August 1999
The alarm system uses scan (SC) points and SD points to monitor and report
the alarm status of each equipment row, to a maximum of 40 rows. Scan
points detect voltage, ground, open-loop, or closed-loop conditions. Signal
distribution points transfer alarm indications to alarm panels and other
equipment. Hardware switch settings and datafill in tables ALMSCGRP,
ALMSC, ALMSDGRP, and ALMSD define the scan and signal distribution
points.
Alarm and control inputs that the alarm system hardware monitors connect
to the alarm system software through scan (SC) points. These scan points
detect signal inputs generated by the following:
•hard-wired alarm contacts in DMS hardware
•operation of manual-control switches
•alarm circuits in miscellaneous DMS and non-DMS equipment in the
central office
•analog trunk circuit-wired contacts
The descriptions of tables ALMSCGRP, ALMSC, ALMSDGRP, and
ALMSD in the data schema section of Tranlations Guide describe SC point
and SD point assignments for the OAS.
The software that monitors the SC points forms the external (EXT) alarms
subsystem of the DMS maintenance system. For more information, see
External Devices Maintenance Guide, 297-1001-593.
System alarm detection
Alarm and control inputs that the software in maintenance subsystems other
than EXT generates are called system inputs. Each maintenance subsystem
controls its alarm status display in the system status area of the Ext level
MAP display (shown in Figure 1-2). The alarm system software checks for
changes in the alarm status of the maintenance subsystems every five
seconds and updates audible and visual alarm indications when alarm status
changes occur.

Introduction 1-5
DMS-100 Family Alarm System Description Reference Manual BASE12
Figure 1-2xxx
Ext level MAP display
CM MS IOD Net PM CCS Lns Trks Ext APPL
. . . . . . . . . .
Ext Ext Alarms Crit FSP Major Minor NoAlm
0 Quit 0 0 0 0 12
2 EXT:
3
4
5
6
7 List_
8 TstDSAlm
9 SetSD_
10 SetSC_
11 Disp_
12
13 _Crit
14 _FSP
15 _Maj
16 _Min
17 _NoAlm
18
Alarm indication
The alarm system software and relay-controlled equipment in the OAU
activate audible or visual alarms, or both, when the system detects alarms in
the DMS-100 Family office.
Audible alarms
Audible alarms activate on site or transfer to a remote monitoring location.
The on-site alarm indication devices mount on the following audible alarm
panels:
•main audible alarm panel (NT0X66) for the DMS-100 Family switch
•optional TTC audible alarm panel (NT0X61) for the TTC in toll offices
The audible alarm panel provides indication of a variety of alarm conditions
in the office.
Visual alarms
Lamps and control switches mounted on panels at the MAP terminal and at
the main exit doors provide visual alarm displays. The alarm control and
display (ACD) and alarm display panels provide this function. Each
equipment aisle is also equipped with lamps that signal local alarm
conditions.
Software subsystems that the maintenance system status display does not
represent can also generate alarms. These software alarms, for example,
Centralized Automatic Message Accounting (CAMA) suspension, interface

1-6 Introduction
297–1001–122 Standard 06.01 August 1999
with the alarm system software through table SFWALARM. The EXT
subsystem reports these alarms.
For more information on the maintenance system MAP terminal, refer to
Maintenance System Man-Machine Interface Description, 297-1001-520.
Alarm classes
The system assigns alarm conditions to one of three classes (severity levels).
The severity is based on the urgency of the required response to the alarm
condition or return of the affected equipment to normal operation. The
maintenance subsystem that detects the trouble assigns the class to the alarm
condition. The alarm classes, in decreasing order of severity are critical,
major, and minor.
Table control
The OAS is controlled by the data schema tables identified in the following
paragraphs. These tables define circuits that monitor equipment and activate
audible or visual alarms.
Alarm scan groups
A scan detector card (NT0X10) contains two SC groups. Each SC group
contains seven SC points. Each SC point monitors a single circuit for a
change of state. When a change of state occurs, the alarm system updates
the EXT alarm display at the MAP terminal. You can set up SC points to
monitor one of the following conditions:
•open or closed loop
•voltage
•ground
Table ALMSCGRP stores SC group data. This table contains information
on alarm circuit equipment location and the type of alarm card used. Table
ALMSC identifies the function performed by each SC point assigned in
table ALMSCGRP.
Alarm signal distribution groups
A signal distribution card (NT2X57) contains two SD groups. Each SD
group contains up of seven SD points. Each SD point activates a single
audible or visual alarm. You can set up SD points in a variety of
configurations.
Table ALMSDGRP stores SD group data. This table contains information
on alarm circuit equipment location and the type of alarm card used. Table
ALMSD identifies the function performed by each SD point assigned in
table ALMSDGRP.