ATT System 25 Installation And Maintenance 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...

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...

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 tothe 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...

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...

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...

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...

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...

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