ATT System 25 MultiLine Telephone User Guide

Signaling
You can use a button to send an alert to another telephone
without actually calling that telephone.
Signaling Another Telephone
1 Do not lift the handset.
2  Press
The other telephone receives a short burst of ringing tone. 
58 

Speaker
Some telephones have a 
place calls without lifting the handset, and allows others to listen
during calls.You cannot speak to the caller unless you lift the
handset.
Placing Calls 

Speakerphone
If you have a Built-In-Speakerphone (BIS) telephone or multiline
telephone with a Hands-Free Unit (HFU), you can use the
Placing Calls
The light next to Speakerphone turns on to indicate that you can listen,
and the light next to Microphone turns on, indicating that you can be
heard on the other end.
2 When the other person answers, begin talking.
NOTE: If you want to temporarily keep the other person .
The light next to this button turns on again.
Answering Calls
1
2
The light next to...

Speakerphone (Continued)
Ending Calls
1 Wait until you have completed your conversation.
The lights next to the Speakerphone and Microphone
buttons go off.
61 

Speed Dialing
Speed dialing allows you to dial telephone numbers (or enter
account codes) by simply dialing “ # “ and a 2- or 3-digit code.
There are two kinds of speed dialing— Personal and System.
Personal Speed Dialing codes are 2-digit numbers that allow you
to program up to twenty personal numbers. These Personal
Speed Dialing codes use the numbers 20 through 39.
System Speed Dialing codes are 3-digit numbers programmed by
your System Administrator, and are used for numbers that are
frequently...

Testing Your Telephone
You can test the lights and ringer on your telephone if you have
a Test/Program Switch. On some telephones, the Test/Program
switch has a spring.If so, you must hold the switch in the “T”
position to test the lights and ringer; the switch will
automatically return to the midpoint when released.
Testing
1
2Slide the switch on the left side of your telephone to “T”.
The red and green lights alternately flash, and the ringer sounds.
NOTE: 
If your switch has a spring, hold the switch...

Transfer
You can easily transfer calls to another System 25 telephone.
You can also transfer some calls to outside lines. However, you
should see your System Administrator for more information
about this type of transfer.
When you transfer a call, the original person is temporarily
placed on hold and is not connected to the other person until
you hang up. At that time, the call disappears from your
telephone.
Transferring Calls
The light next to the button of the call on hold blinks.
2  Dial the other...

Glossary
account code
entry
alarm
assigned button
assigned feature
automatic
intercom
BIS
busy-to-idle
reminder
call
accountability
call waiting
callback
conferencing
feature that allows you to assign account
codes to calls to charge them to specific
customers, clients, or business cases.
feature that warns you of system problems.
button that may be given to you as an
optional feature.
optional feature that can be distributed by
the System Administrator.
feature that allows two people to each have
a...

confirmationthree short tones indicating that an
toneaction was accepted.
coverage
DDC
DGC
DSS
data call (from
telephone)
dequeueing tone
exclusion
extending calls
FPDC
fast busy tonefeature that allows individuals to have their
calls answered by someone else.
(Data Dial Code) extension number
assigned to a data terminal.
(Direct Group Calling) a group of
telephones where incoming calls are
distributed among the group members.
(Direct Station Selection) button containing
an extension number or an access...

feature access
code
fixed feature
following/
forwarding
hands-free
answering
hold
idle line
preference
inside call
leave word
calling
message waiting
message waiting
signal
system access
button
system access
originate only
button
night service
series of numbers and characters that allow
you to access System 25 features.
standard feature that is available to every
telephone.
feature that allows you to redirect
calls to another telephone.
feature that provides answering of
calls without lifting the...