ATT System 25 MultiLine Telephone User Guide

AT&T System 25
Multiline Telephone
User Guide 

©1989 AT&T
All Rights Reserved
Printed in USA
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Contents
1Introduction
9Multiline Features
Account Code Entry
Automatic Intercom
Bridged Access
Call Accountability
Call Waiting
Callback
Conference Calls
Coverage
Data Calls
Placed from Your Telephone
Direct Group Calling (DGC)
Direct Station Selection (DSS)
Directory
Display
Display Functions
Exclusion
Following
Forwarding
Hands-Free Answering
Hold
Inspect
Last Number Dialed
Leave Word Calling
Message Waiting
Night Service
Paging
Park
Personal Message Waiting
Pickup
Placing Calls
Programming Numbers
9...

Recall55
Repertory Dialing (REP DIAL)
Send All Calls
Signaling
Speaker
Speakerphone
Speed Dialing
Testing Your Telephone
Transfer
56
57
58
59
60
62
63
64
65Glossary 

Introduction
This guide describes the features available to you from AT&T
System 25 through a multiline telephone and provides
instructions for using the features. For your convenience, the
features are arranged in alphabetical order.
Your telephone is ready to use as soon as it is connected to the
System 25. Therefore, as you learn to use the features, you can
make and receive calls with your telephone just as you would
with any ordinary phone.
Features
Your AT&T System 25 has two types of features:...

Multiline Telephone Models
The telephones shown below and on the following page are
some of the phones that are used with System 25. You can use
this guide with any of these telephones.
5-Button
10-Button10-Button BIS 

22-Button BIS with Display22-Button BIS
34-Button
34-Button BIS with Display 

Buttons
Most multiline telephones have
Each is represented in a special
TYPE
dial pad buttonsthree standard types of buttons.
way in this guide:
SHOWN AS:
button next to permanent
label with dark background
button next to changeable 
label with light background
NOTE:  A fourth type of button can be found on the display unit, 
and is represented in this way: 
Each multiline telephone has System Access buttons that are 
used to place and receive calls and to access special system 
features.  On most...

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

Ringing Tones
System 25 signals you with four distinctive rings. The rings and
their descriptions are listed below.
Your call is from a person inside your company. 
Your call is from the attendant or someone outside your
company.
This can indicate a call on another line; a busy-to-idle reminder;
a manual signal; or that your telephone is in program mode.
You are being alerted that your request for Callback can now be
completed; or a call is being set up remotely for your phone via
a data feature known as...