AT&T Network Adapter 25 Manual

AT&T
AT&T System 25
Installation and
Maintenance Manual
555-540-103 B
November 1995

©1989 AT&T
All Rights Reserved
Printed in USA
TO ORDER COPIES OF THIS DOCUMENT REFER TO DOCUMENT NUMBER
555-540-103
Contact: Your AT&T sales representative, or
Call: 800-432-6600, Monday through Friday between 7:30 am
and 6:00 pm EST, or
In Canada call: 800-255-1242
Write: AT&T Customer Information
2855 North Franklin Road
P.O. Box 19901
Indianapolis, Indiana 42619
Every effort was made to ensure that
complete and accurate at the time of
subject to change. This document will
changes.
Center
the information in this document was
printing. However, this information is
be reissued periodically to incorporate
Installation and Maintenance Manual
Prepared by System 25
Document Development Group and the
AT&T Documentation
Management Organization

DANGER
Do not open the fan assembly or remove rear cabinet cover before
unplugging the cabinet from the electrical outlet. Wait at least five
minutes after unplugging the power cord before removing the rear
cover or power supply. The AT&T System 25 cabinets are not user
serviceable. Some voltages inside the cabinets are hazardous.
This equipment is to be serviced only by qualified technicians.
CUSTOMER WARNING
The Installation and Maintenance Manual is designed for use by
qualified service technicians only. Technician qualification includes
completion of an AT&T hands-on instructor-led course covering
installation and maintenance for this product. The use of these
documents by anyone else might void the warranty. Hazardous
electrical voltages are present inside this product.
SERVICE TECHNICIAN WARNING
1. Never install telephone wiring during a lightning storm.
2. Never install telephone jacks in wet locations unless the
is specifically designed for wet locations.
3. Never touch uninsulated telephone wires or terminals un
jack
less the
telephone line has been disconnected at the network interface.
4. Use caution when installing or modifying telephone lines.
a

THE FOLLOWING SYMBOLS AND PICTOGRAPHS
APPEAR ON THE EQUIPMENT
SYMBOL
The exclamation point
within an equilateral
triangle is intended
to alert the user to
the presence of
important operating
and maintenance
(servicing) instructions
ELECTRICAL SHOCK
Warns of the danger
of electrical shock
from hazardous voltages
present within the
control unit
Warns of the risk of
fire if the air filter
is not in place
b

FCC NOTIFICATION AND REPAIR INFORMATION
AT&T SYSTEM 25
This telephone equipment is registered with the Federal Communications
Commission (FCC) in accordance with Part 68 of its Rules. In compliance with
the Rules, be advised of the following:
MEANS OF CONNECTION
Connection of this telephone equipment to the nationwide telecommunications
network shall be through a standard network interface USOC RJ21X jack.
Connection to private line network channels requires USOC RJ2GX jack for tie
lines or USOC RJ21X jack for off-premises station lines. Connection to T1
facilities requires USOC RJ48X or RJ48C jack. These can be ordered from your
telephone company.
NOTIFICATION TO THE TELEPHONE COMPANY
If the system is to be connected to off-premises stations (OPSs), you must notify
the telephone company of the OPS class of service, OL13C, and the service
order code, 9. OF. For R3 systems, the Analog service order code is 9.0Y, the
Digital service order code is 6.0Y.
Upon the request of the telephone company, inform them of the following:
— The Public Switched Network “lines” and the Private “lines” to which
you will connect the telephone equipment.
— For private line connections, provide the facility interface code, TL31M
for tie lines. You must also specify the service order code, 9.0F or 9.0Y
for R3 systems.
Customer instructions will advise the customer to provide the telephone
company with the registration number (either -MF or -KF, depending on
the application of the system) and the ringer equivalency number (REN)
from the label on the equipment. In addition, customer will be advised
c

that certification in writing may be required when an existing
multifunction system is being reconfigured as a Key system, if the
customer desires the lower rate.
— For Digital connections with D4 Framing Format provide the Facility
interface code 041DU9-B, for digital connections with Extended Framing
Format, provide the Facility interface code 04DU9-C. You must also
specify the service order code, 6.0Y.
— The quantities and USOC numbers of the jacks required.
— For each jack, provide the sequence in which lines are to be connected;
the type lines and the facility interface code and the ringer equivalence
number by position, when applicable.
This telephone equipment should not be used on coin telephone lines.
Connection to party line service is subject to state tariffs.
REPAIR INSTRUCTIONS
If you experience trouble with this telephone equipment, contact the AT&T
Business Customer Service Center on 1-800-242-2121. The telephone company
may ask that you disconnect this equipment from the network until the problem
has been corrected or until you are sure that this equipment is not
malfunctioning.
System 25 troubles that must be escalated to a higher level of maintenance
should be referred to the National Service Assistance Center on 1-800-628-2888.
RIGHTS OF THE TELEPHONE COMPANY
If your telephone equipment causes harm to the telephone network, the
telephone company may discontinue your service temporarily. If possible, they
will notify you in advance. But if advance notice isn’t practical, you will be notified
as soon as possible. You will be informed of your right to file a complaint with the
FCC.
d

Your telephone company may make changes in its facilities, equipment,
operations, or procedures that could affect the proper functioning of your
equipment. If they do, you will be notified in advance to give you an opportunity
to maintain uninterrupted telephone service.
HEARING AID COMPATIBILITY
The voice terminals described in this manual are compatible with inductively
coupled hearing aids as prescribed by the FCC.
FCC INFORMATION
FCC REGISTRATlON lNFORMATlON
Registration Number AS593M-71565-MF-E
Ringer Equivalence
0.5A
Network Interface RJ21X, RJ2GX or RJ48X
PRIVATE LINE SERVICE
Service Order Code
● Analog
9.0F
● Analog (R3)9.0Y
●Digital (R3)
I
6.0Y
Facility Interface Code
●Tie Lines TL31 M
● Off-Premises Stations OL13C
● Digital D4 Framing 04DU9-B
●Digital ESF 04DU9-C
November 1995

FCC WARNING STATEMENT
Federal Communicatlons Commission (FCC) Rules require that you be notified of
the following:
This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause
interference to radio communications.
It has been tested and found to comply with the limits for a Class A computing
device pursuant to Subpart J of Part 15 of FCC Rules, which are designed to
provide reasonable protection against such interference when operated in a
commercial environment.
Operation of this equipment in a residential area is likely to cause interference
in which case the user at his or her own expense will be required to take
whatever measures may be required to correct the interference.
SECURITY OF YOUR SYSTEM-PREVENTING TOLL FRAUD
As a customer of a new telephone system, you should be aware that there exists
an increasing problem of telephone toll fraud. Telephone toll fraud can occur in
many forms, despite the numerous efforts of telephone companies and telephone
equipment manufacturers to control it. Some individuals use electronic devices
to prevent or falsify records of these calls. Others charge calls to someone else’s
number by illegally using lost or stolen calling cards, billing incorrect parties,
clipping on to someone else’s line, and breaking into someone else’s telephone
equipment physically or electronically. In certain instances, unauthorized
individuals make connections to the telephone network through the use of remote
access features.
The Remote Access feature of your system, if you chose to utilize it, permits off-
premises callers to access the system from a remote telephone by using an 800
number or a 7- or 10- digit telephone number. The system returns an
acknowledgement signaling the user to key in his or her authorization code,
which is selected and administered by the system manager. After the
authorization code is accepted, the system returns dial tone to the user. If you do
not program specific egress restrictions, the user will be able to place any call

normally dialed from a telephone associated with the system. Such an off-
premises network call is originated at, and will be billed from, the system location.
The Remote Access feature, as designed, helps the customer, through proper
administration, to minimize the ability of unauthorized persons to gain access to
the network. Most commonly, phone numbers and codes are compromised
when overheard in a public location, through theft of a wallet or purse containing
access information, or through carelessness (writing codes on a piece of paper
and improperly discarding it). Additionally, hackers may use a computer to “dial”
an access code and then publish the information to other hackers. Enormous
charges can be run up quickly. It is the customer’s responsibility to take the
appropriate steps to properly implement the features, evaluate and administer the
various restriction levels, protect access codes, and distribute access codes only
to individuals who have been fully advised of the sensitive nature of the access
information.
Common carriers are required by law to collect their tariffed charges. While
these charges are fraudulent charges made by persons with criminal intent,
applicable tariffs state that the customer of record is responsible for payment of
all long-distance or other network charges. AT&T cannot be responsible for such
charges and will not make any allowance or give any credit for charges that result
from unauthorized access.
To minimize the risk of unauthorized access to your communications system:
● Use a nonpublished Remote Access number.
● Assign authorization codes randomly to users on a “need-to-have”
basis, keeping a log of ALL authorized users and assigning one code
per person.
● Use random sequence authorization codes, which are less likely to be
broken.
● Deactivate all unassigned codes promptly.
● Ensure that Remote Access users are aware of their responsibility to
keep the telephone numbers and any authorization codes secure.
● When possible, restrict the off-network capability of off-premises callers,
via use of Call Restrictions and Disallowed List capabilities.

● When possible, block out-of-hours calling.
● Frequently monitor system call detail reports for quicker detection of any
unauthorized or abnormal calling patterns.
● Limit Remote Call Forward to persons on a “need-to-know” basis.