ATT System 25 Installation And Maintenance Manual

							Figure 4-8.
Figure 4-9.
Figure 4-10.
Figure 4-11.
Figure 4-11.a.
Figure 4-12.
Figure 4-13.
Figure C-1.
Figure C-2.
Figure C-3.
Table 2-A.
Table 2-B.
Table 2-C.
Table 2-D.
Table 2-E.
Table 2-F.
Table 4-A.
Table 4-B.
Table 4-C.
Table 4-D.
Table 4-E.
Table 4-F.
Table A-A.
Table A-B.
Table A-A.
Table A-B.
Table C-A.
Table C-B.
Table E-A.
Table E-B.AC Power Schematic
4-68
System Cabinet Backplane Wiring Side (Sheet 1
of 2)4-73
TDM Signal Destinations on Cabinet Backplane   4-75
Power Designations on Cabinet Backplane  4-76
853 Adapter
4-79a
Clearing Virtual Facilities Troubles (Sheet 1 of 3)  4-86
Clearing Switched Loop Attendant Console
Troubles (Sheet 1 of 5)4-94
Typical System 25 Port Circuit PackC-4
Tie Trunk (TN760B) Circuit Pack Option Switches  C-5
DS1 Network Interface ConnectionsC-12
Tables
Tools and Test Equipment Required for
Installation2-2
Circuit Packs, Their Functions, and Protectors 2-24
Displayed SAT Messages During Cold or Warm
Restart
2-37
Circuit Pack LED Status Indications
2-40
Circuit Pack Versus Terminal Type                            2-66
Feature Button Abbreviations and Lables            2-88
Displayed SAT Messages During Cold or Warm
Start  4-25
Power Supply Test Points4-65
Circuit Pack Voltages—Symptoms
4-66
25-Pair Connector to Backplane Designations 4-78
Station/Trunk/Special Port Circuit Pack Options  4-99
Applicable Actions for Circuit Pack Options      4-
100
25-Pair Connector Pin AssignmentsA-2
Building Wiring
A-4
25-Pair Connector Pin Assignments
A-2
Building WiringA-4
Unit Loads                                                                                            C-2
TN760B Option Switch Settings and
AdministrationC-6
Default Dial Codes      E-1
PORT/PD. Administration, Voice Terminals
(Menu=1/2)
E-2
November 1995
-xi- 
						

							Table E-C.
Table E-D.
Table E-E.
Table E-F.
Table E-G.
. .
Table E-H.
Table E-1.
Table E-J.
Table E-K.
Table E-L.
Table E-M.
Table E-N.
Table E-0.
Table E-P.
Table E-Q.
Table E-R.
Table E-S.
Table E-T.
Table E-U.
Table E-V.
Table E-W.
Table E-X.
Table E-Y.
Table E-Z.
Table E-AA.
Table E-AB.
Table E-AC.
Table E-AD.
Table E-AE.
Table E-AF.
Table E-AG.
Table E-AH.Voice Terminal Type Codes
Feature Button Translation (Menu=1/2) 
Multiline Voice Terminal Button Defaults 
Switched Loop Attendant Console Button
Defaults (Type 310) 
Switched Loop Attendant Console Button
Defaults (Type 311)
Direct Trunk Attendant Console Button Defaults
(Cold-Start Defaults) 
Direct Trunk Attendant Console Defaults
(Administration-lnstalled Defaults) 
MET Set Button Defaults 
PORT/PDC Administration, Data Terminals
(Menu=1/2)
Data Port Type Codes 
Port Administration, Trunks (Menu=1)
Trunk Type Codes 
Trunk Class-of-Service (for all trunks except DID) 
Port Administration, Auxiliary Equipment
(Menu=1)
Special Feature Port Type Codes 
Port Options
Applicable Options 
PDC Administration (Menu=2) 
High Density Circuit (Menu=3) 
System Administration (Menu=4) 
Standard Call Type Defaults
Message-Center-Like Call-Type Defaults (effect
of Action 90)
Floating PDC Administration (Menu=5)
Direct Group Calling (DGC) Administration
(Menu= 6) 
Toll Calls Allowed (TCA) List Administration
(Menu= 7) 
DGC Announcement Administration 
Searches: Action Items (Menu=8) 
Board Type—Wildcard Representation 
Port/Board Type—Specific Representation 
Save/Restore and System Restarts (Menu=9)
RS232 Port Administration (Menu=10)
Automatic Route Selection Administration
(Menu=11) 
E-13
E-14
E-17
E-18
E-19
E-20
E-21
E-22
E-23
E-25
E-26
E-28
E-29
E-30
E-32
E-33
E-34
E-35
E-35
E-36
E-42
E-43
E-43
E-44
E-44
E-45
E-46
E-50
E-51
E-54
E-55
E-56
-xii-November 1995 
						

							INTRODUCTION
INTRODUCTION
This manual provides procedures and information for installing, and testing the
AT&T System 25 Release 3 and associated equipment. The maintenance
information contained in Section 4 pertains to the AT&T System 25 Release 1,
Versions 1 and 2 (RI VI and R1V2), Release 2, Version 1 (R2V1 ), as well as to
AT&T System 25 Release 3, Version 1,2 and 3 (R3V1, R3V2 and R3V3).
Installation and maintenance procedures for the AT&T System 25 Call
Management System and Integrated Solution are provided in a separate set of
documents for each system.
This manual is intended for use by an installation and/or maintenance technician
dispatched to a System 25 site for an installation or in response to an alarm or a
user trouble report. This technician must have completed the Tier 1 training
course (T-335). Each installed System 25 has a customer-designated System
Administrator.The technicianshould work closely with this System
Administrator. The System 25 Administration (555-540-500) and Implementation
(555-540-650) Manuals describe the administrator’s functions.
In the S25 documentation, the terms “voice terminal”, “voice stations”, and
“telephone” are used to describe the same piece of hardware. The S25
documentation also uses the terms ‘Personal Dial Code (PD.)”, and ‘extension
number’ interchangeably.
The remainder of this manual is divided into Sections 2 through 6 and six
appendices:
lSection 2. Installation-Describes the installation of the cabinet(s)
wiring, and other components. Certain preinstallation requirements
must be met; therefore, read “PREINSTALLATION REQUIREMENTS”
before installing any part of System 25.
lSection 3. System Test—Describes all the tests necessary to verify
that the system is operating correctly.
lSection 4. Maintenance —Provides information necessary for
monitoring, testing, and maintaining all releases of AT&T System 25.
November 19951-1 
						

							INTRODUCTION
l
l
l
l
l
l
l
lSection 5 References-Lists anddescribes other related
documentation
Section 6 Abbreviations and Acronyms-Lists and describes
abbreviations and acronyms frequently encountered in System 25
documentation
Appendix A. System Wiring Table–Lists pinouts and wiring used
with System 25
Appendix B. Parts Listing—Lists all related parts of System 25
Appendix C. System Additions and Changes-Describes how to
make additions to an existing system
Appendix D. System Upgrade–Describes how to upgrade an R1V1
R1V2 or R2V1 release of System 25 to an R3 release
Appendix E. System Codes and Data Entries–Lists all default codes
and data entries for administering the system
Appendix F. Administration Tables–Lists all error messages that
can occur when the system is being administered
FCC PRECAUTIONS
Electromagnetic fields radiating from the system cabinets may generate noise in
other communications equipment The technician must be sure that all cabinet
panels and covers are securely in place after performing maintenance
Caution:
Electrostatic discharge can destroy or severely damage
integrated circuits or CPs.
The maintenance technician MUST ALWAYS WEAR A WRIST GROUNDING
STRAP when handling CPs The cord must be attached to the grounding block at
the back of the cabinet or to a front-cover retainer screw Damage to integrated
circuits caused by electrostatic discharge may not be immediately apparent
Caution:The wrist grounding strap must not be clipped to any
cabinet location other than the grounding block.
1-2November 1995 
						

							INSTALLATION
INSTALLATION
Installation of a System 25 requires the completion of a number of basic
steps, similar to those required to install any customer switching system.
Assuming that the building (station) wiring is already in place, the
recommended sequence of steps for installation of the system is as follows:
1.Preinstallation Requirements
2. Install System Cabinets
3. Power Up and Initialize System
4.Install Cross-Connect Equipment (See Note below.)
  5. Install Modular Bulk Power Supply (Optional)
6. Connect Cabinets to
7. Connect Cabinets to
8. Install
9. Install
10.InstallTrunk Access Equipment
Station Interconnect Panel (SIP)
Customer’s Peripheral Equipment
Terminals
Auxiliary Equipment
11.Test System
Note:Step 4 can be done before Steps 2 and 3 if the cross-
connect equipment is delivered before the cabinets.
2-1 
						

							INSTALLATION
TOOLS AND TEST EQUIPMENT
Table 2-A lists tools and test equipment required for installing a System 25.
Table 2-A.
Tools and Test Equipment Required for Installation
TasksTools Required
Recommended Type
InstallPush Drill
Cross-ConnectScrewdriver8-inch Flat Blade
Field
Carpenter’s Level30-inch
Rule30-inch
Chalk Line
11 O-type Punch-down ToolAT-8762 D-Impact Tool
AdapterBR866 JC (403608235)
UnpackTin Snips
CabinetUtility Knife
Adjustable Wrench6- or 8-inch 
InstallRule
30-inch
CabinetsAdjustable Wrench
6- or 8-inch
or AddScrewdriver8-inch Flat Blade
CarriersAllen Wrench1/8-inch
Add Voice
TerminalsDiagonal Pliers
or InstallScrewdriver8-inch Flat Blade
Auxiliary11 O-type Punch-down ToolAT-8762 D-impact Tool
Equipment
Add
Screwdriver8-inch Flat Blade
Circuit Packs (CPs)
Initialize
System Administration TerminalRS-232C
SystemDigital Tape Unit (not RS-232C)
—
Test System*
Test SetDracon TS21
* Used in Section 3 of this manual
2-2 
						

							INSTALLATION
CROSS-CONNECT EQUIPMENT DESCRIPTION
This section provides a brief description of some of
connect/interconnect equipment. More details on the
can be found in the Reference Manual (555-540-200).
the following:
lTrunk Access Equipment
700A Jacks
Emergency Transfer Unit
l Station Interconnect Panel
— 617A Panel
Adapters
Fanning Strip
l Cables
— Splitter Cables
— Octopus Cables
— Cable Labels.the System 25 cross-
System 25 equipment
This section describes
2-3 
						

							INSTALLATION
Trunk Access Equipment
The trunk access equipment (TAE) consists of 700A-I 10-61-25 or 700A-66-
B1 -25 (157BF) cut-down jacks, or equivalent, and up to four 10B Emergency
Transfer Units (ETUs). The 10B ETU is shown in Figure 2-1.
700A- 110-M-25 or 700A-66-B1-25 (157BF) Cut-Down Jack
Trunk circuits that appear on the network interfaces are grouped by trunk
type (Direct Inward Dialing [DID], Central Office [CO], or Tie) and punched
down on the 700A jack. One 700A jack is required for each RJ21 X or RJ2GX
network interface. The 700A-1 10-B1-25 jack has a 110-type cut-down field,
and the 700A-66-B1-25 (157BF) has a 66-type cut-down field. It is important
to note that most secondary wiring protectors (sneak current fuses) are
compatible only with the 66-type jack.
10B Emergency Transfer Unit (ETU)
During a power failure or system outage, each 10B ETU provides contact
closures for bypassing the switch and connecting up to five predesignated
FCC registered single-line voice terminals to telephone company trunks.
Connectorized cables (25-pair) connect the ETU to the 700A jacks, the
system cabinets, and the Station Interconnect Panel. A modular plug-ended
cord (part of octopus cable) connects control power (–48 V dc) from the
system cabinet.
Screw terminals that connect to relay contacts which may be used for an
external alerting device are also provided. The relay contacts close when a
failure occurs. (Any alerting device and associated power unit with a dc
current requirement less than or equal to 0.5 ampere may be used.) The ETU
also controls a DID make-busy contact that connects to the last pair on the
700A jack. For a more detailed drawing of the 10B ETU, see Install
Emergency Transfer Units (ETUs) in this part.
2-4 
						

							INSTALLATION
NOTE: 9“ WIDE, MOUNTING
CENTERS ARE 8-1/2”
APART, FLANGES
OVERLAPPED
Figure 2-1.10B ETU
2-5 
						

							INSTALLATION
Station Interconnect Panel (SIP)
The SIP is the station cross-connect field and consists of the following
equipment:
l 617A Panels
l Adapters
l 50A Fanning Strips.
617A Panel
The 617A Panel is a metal plate with keyslot holes on each side for mounting
on a backboard. (See Figure 2-2.) Each 617A Panel can hold eight 2210A2
or 858A Adapters, each of which can accommodate six connections to the
port circuits in the cabinets.As many as five 617A Panels may be required
for a maximum size system.The adapters snap into prepunched holes on
the 617A Panels. (Reattached spacer buttons keep adapters from touching
the metal panels.)
The cable rings located at the top of the 617A Panel route the building wiring
cables to the adapters.Purse lock clips hold the building wiring cables in
place. The white posts at the bottom of the 617A Panel guide the wiring from
the 50A Fanning Strip to each column of adapters.
Preprinted boxes and numbers on the panel identify modular jacks for
record-keeping purposes.
Letters are marked in the boxes at the top of each
column by the installer.The letter (A through J) and the corresponding
preprinted row number (1 through 24) identify the port jacks. For example,
Al identifies the modular jack located in column A row 1.
2-6