ATT System 25 MultiLine Telephone User Guide

							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 their own“floating” extension number (FPDC).
Display Unit
If your telephone has an attached display, use the procedures
and sample screens under the following sections: “Directory”,
“Display”, and “Display Functions”. If your telephone does not
have a display unit, you can skip these parts of the guide.
Additional Information
See your System Administrator if you have any questions or
would like additional information about your System 25 features.
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							Multiline Features
Account Code Entry
For bookkeeping purposes, your System Administrator may
assign account codes to use with certain calls. If you are
required to use account codes for outgoing calls, the account
code must be entered before you can place an outgoing call. If
this feature is not mandantory, you may still optionally use the
Account Code Entry feature.
See your System Administrator to verify the types of calls, if
any, for which you must enter an account code.
Account Code Entry - Outgoing Calls
1
2
3
4
5Listen for dial tone, then press
Dial the account code. 
NOTE: If you make a mistake while entering the account
code, press
, then the correct account code. 
Listen for dial tone.
Dial the outside line access code and listen for dial tone.
Dial the telephone number.
NOTE: Do not use AC use the button for this
procedure.
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							Account Code Entry (Continued)
Account Code Entry - Incoming Calls
1
2
3
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							Automatic Intercom
You and another person may each have a button labeled
that you can use to call each other.
Using AUTO ICOM
1  Press
2 Listen for ringback.
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							Bridged Access
This feature allows for a common connection between a specific
button, on your telephone and a specific line
button, on someone elses telephone.  You can 
join in a call or cover the other line by using your bridged access
button.  Up to 15 people can use their bridged access buttons for 
the same system access button. 
Your System Administrator can set your 
to ring in any of the following ways: button
n Ring immediately when a call rings
line.
n Ring after a predetermined numberat the other person’s
of rings (delayed ring).
Not ring at all.
If you are on a call and another call comes in on a previously 
idle
button, you will hear abbreviated ringing. 
When someone picks up the call, the light next to your
button becomes steadily lit. 
Bridging Onto a Call in Progress
1  Press the
button next to the steadily lit
green light.
You are connected to the call in progress. 
2 To drop out, simply hang up at any time.
NOTE: You cannot bridge onto a call if any one of the
extensions on that call has their Exclusion feature turned on
or if the conference limit has already been reached for that
call.
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							Call Accountability
You can use your own extension number at any other extension
to place toll calls that should be billed to you.
Billing Calls to Your Extension
1 Listen for dial tone, then press
2 Dial your extension number.
3 Listen for dial tone, then dial the telephone number.
NOTE: If you make a mistake, hang up and restart the
sequence.
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							Call Waiting
If all of your System Access buttons are busy, you may be
notified (through your handset) that a call is waiting. If you
hear one short tone, it is an inside call waiting; two short tones
indicate you have an outside call waiting.
If you have a System Access-Outgoingbutton on 
your telephone, you can put your calls on hold and answer the
call waiting.If you do not have this button, you must end one
of the existing calls in order to answer the call waiting.
Answering - Using SYS ACC-O
1 Press  
2 Press .
I
3  Press
Answering - Ending a Current Call
1 End your conversation and hang up.
2 When the telephone rings, lift the handset.
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							Callback
If a System 25 extension or outside line is busy when you place a
call, you can request a callback. Your call will wait in a line
(called a queue) for the extension or line to become available.
The system will then alert you with a priority ring and complete
the call.
For inside calls, use Callback when you hear a busy tone or a
special ringback tone.For outside calls, use Callback only when
you hear fast busy tone.
NOTE: You may hear the callback request queueing tone
automatically when you place certain calls.
Requesting Callback
1  Before you hang up, press
2  Listen for queueing tone, then hang up. 
NOTE: If you do not hear
not been accepted for this
Completing Callback
queueing tone, your request has
call.
1 When you hear priority ring, lift the handset.
NOTE: If you remained off-hook after requesting Callback,
you will not receive priority ring.
2 Listen for dequeueing tone.
Your call will be completed as dialed.
Canceling Callback
1  Press
2  Press the button associated with the call. 
3  Hang up. 
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							Conference Calls
You can set up a conference that includes a combination of
System 25 extensions as well as outside calls. You may have up
to five conferees; however, no more than two may be on outside
lines.
Setting Up Conference Calls
1 Dial the first person and announce the conference call.
2  Press 
and listen for dial tone. 
The light next to the held call blinks intermittently.
3 Dial the next person you want added to the conference.
NOTE: If for any reason this call should not be added (busy,
no answer, or misdial): press the switchhook, then the
button associated with the first person; go back to Step 2 and
continue.
4 Announce the conference call to the added person.
5 Press the button next to the blinking light to join the calls
together.
6 For each person you, want to add, go back to Step 3 and
continue the same procedures.
Dropping a Conferee
When you drop someone from the conference, anyone that was
added by that person is also dropped unless they are on a
Bridged Access or Personal Line button. If you drop the person
who added you to the conference, you will also drop anyone
added to the conference by that person.
1 Press 
2 Press the button of the person you want to drop.
The light associated with the dropped call goes off.
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							Coverage
If your System Administrator has administered this feature, calls
to you can be answered (covered) at specified telephones when
you do not answer the call yourself. Calls unanswered at your
telephone will start ringing at the covering telephone after a
preset number of rings.
However, if you are busy on another
line, calls will go to coverage after a preset number of rings
(usually one).
Buttons used for Coverage answering are:
 Coverage calls for one specific person are sent
to an Individual Coverage button assigned to the extension. 
 Coverage calls for a group of two or more
extensions come in on a Group Coverage button associated 
with the group the extensions are assigned to. 
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