ATT System 25 Cordless Telephone User Guide

555-540-711
Issue 1
1989
AT&T System 25
Cordless Telephone
User Guide 

©1989 AT&T
All Rights Reserved
Printed in USA
TO ORDER COPIES OF THIS DOCUMENT REFER TO DOCUMENT
NUMBER 555-540-711.
Contact: Your AT&T Sales Representative, or
Call: 800-432-6600, Monday to Friday between 7:30 am
and 6:00 pm EST.
In Canada dial 800-255-1242, or
Write: AT&T Customer Information Center
285 North Franklin Road
P.O. Box 19901
Indianapolis, Indiana 46219
Every effort was made to ensure that the information in this document
was complete and accurate at the time of printing. However, this...

Contents
1Introduction
Cordless Telephone Controls2
Lights4
Ringing Tones4
Handset Tones5
7System 25 Features
Programming System 25 Features10
Considerations10
Procedures for Programming Features11 

Introduction
This guide lists all of the features available to you from AT&T
System 25 through the cordless telephone and provides basic
instructions on how to use your cordless telephone to program
those features. For a full description of these features, and step-
by-step instructions on how to implement them, see the AT&T
System 25 Multiline Telephone User Guide.
Your cordless telephone is ready to use as soon as it is connected
to the System 25. You can still make and receive calls while you
are...

Cordless Telephone Controls
The following figures show the controls on the handset and base
unit of the cordless telephone. See the owner’s manual that
accompanied your set for more detailed information on how to
use these controls.
Base Unit Controls
1 Retractable Antenna6 Channel Indicator
2 Power Cord with AC Adapter7 Mode
3 Handset Hook8 T/P Switch
4 Directory Card9 Ringer Volume
5 Battery Contacts10 Message Light
2 

Handset Controls
1
2
3
4
5
6
7
Antennas8
On/Off9
Message Light10
Low Battery Light11
Line Card Label12
Line/Feature Buttons13
StatusTransfer
Hold
Dial Pad
Channel
Number Card
Battery Contacts
3 

Lights
Your cordless telephone uses red LEDs (light emitting diodes) to
indicate the call status for each line. These LEDs normally
remain off. They become lit only when you take some action,
such as pressing STATUS, ON/OFF, a feature button, or lifting
the handset from the base unit. The LEDs flash or blink to
indicate different call states, as described below.
A steady light indicates the line or feature in use.
A slow flashing light indicates an incoming call.
A fast blinking light indicates a call on...

Handset Tones
System 25 signals you with tones that are heard through the
handset. The tones and their descriptions are listed below.
DIAL TONE 
lllllllllllllllllllllllllllllllllllIllllllllllllllll (a continuous steady tone)
You can dial.
CONFIRMATION TONE 
IIII II (three short tones)
Your action has been accepted.
RINGBACK TONE IIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIII (repeating on/off tone)
The number you dialed is ringing.
SPECIAL RINGBACK TONE IIIIIIIIIIIIIIIIIIIIIIIIIIII 
II (one long tone and
one short,...

Data Dial Code (DDC)
When your System 25 was installed, Data Dial Codes (DDCs)
were assigned to data terminals. If you have a data terminal
associated with your System 25, you will receive separate
information regarding its use.
Personal Dial Code (PDC)
Personal Dial Codes (PDCs) were assigned to telephones. In
most cases, your PDC is your extension number. If a telephone
is shared by two or more people, each person may have been
assigned his or her own “floating” extension number (FPDC).
Additional...

System 25 Features
The cordless telephone implements nearly all the features
normally available on a multiline telephone. (Since the cordless
telephone does not have a speakerphone, display, or certain
function buttons, some features are unavailable.) See the AT&T
System 25 Multiline User Guide for a full description of features,
and detailed procedures on how to implement them.
Your AT&T System 25 has two types of features: fixed and
assignable. A fixed feature is one that is provided on all
multiline...