Aastra DT288 User Guide

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DT288

Cordless Telephone for MD110

User Guide

DT288

Welcome

Welcome to the User Guide for the DT288 cordless phone in the Ericsson Enterprise business communication system MD110.

It is a state-of-the-art business communications system. Its alliance of features and facilities effectively improves communications for virtually any kind of organization.

To take full advantage of these advanced features and facilities there is a line of telephones, designed for ease of use in every situation. Your phone is menu driven. By use of the Scroll keys and the CLR, YES and NO keys you get access to frequently used functions and numbers. Step-by-step instructions in the display assist your actions on the phone.

Some markets use differing codes for some functions. In this guide, all functions are described using the most common code for every specific function. As a note the markets and their differing code is shown.

The User Guide describes the facilities of the Ericsson Enterprise communication system and the DT288 phone as it is programmed at delivery from the factory. There may be some differences in the way your system is programmed. Please consult your system administrator if you need further information.

DT288

Table of Contents

page

Important ................................................4

Description ................................................6

Switching On/Off ....................................11

Free Seating (optional) ............................12

Incoming Calls ........................................13

Outgoing Calls ........................................14

During Calls ............................................17

When You Receive a Busy Tone ............22

Call Forwarding ......................................25

Internal Messages ..................................33

Voice Mail ..............................................35

Information ............................................38

Abbreviated Numbers ............................41

Phone Book ..........................................43

Group Facilities ......................................49

Other Useful Facilities ............................51

Paging (optional) ....................................56

Authority ................................................60

Settings and Adjustments ......................64

Audible Signals ......................................72

Display Information ................................76

Installation ..............................................79

TroubleShooting ....................................82

Index ......................................................84

EN/LZT 103 06 R1B

stored in retrieval system,or transmitted in any form or by any

means, electronic, mechanical, photocopying, recording or

otherwise, without prior written permission of the publisher.

Important

DT288

Important

IPEI code

Your telephone has an International Portable part Equipment Identity (IPEI) code. This code is needed for your system administrator to enable network subscription.

Furthermore you may need the IPEI code to unblock your telephone if an incorrect PIN code has been entered three times (=telephone is blocked).

To find the IPEI of your phone:

Select

Information and press

Select

ShowIPEI and press

Enter your PIN code and press

(Default code: 0000) The IPEI number is displayed.

Note: Once the phone is blocked it is impossible to read the IPEI code in the phone. Therefore, write down the IPEI code but keep the code secret to prevent misuse of your phone.

Important

DT288

Guidelines

Consider these suggestions and guidelines to keep your telephone in good shape and working properly.

Intrinsic safety

The telephone is not specified as intrinsically safe, so do not use these telephones in areas with a danger of explosion.

Battery handling

The battery contains environmental polluting material. If defect, return it to a collecting point.

Cleaning

Clean your telephone only with a soft, water dampened cloth. Using soap or any other cleaning materials may discolour or damage the telephone.

Treatment

Do not expose your telephone to direct sunlight for long periods. Keep the telephone away from excessive heat and moisture.

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Description

DT288

Description

Antenna

Volume Up

Off hook: raise earpiece volume.

See section “Adjustments”.

Volume Down

Off hook: lower earpiece volume.

See section “Adjustments”.

Off hook / Yes

Answer call, accept.

Cancel key

Delete latest entered digit.

Backspace when editing text.

Cancel a menu option.

Microphone-, ringer- and

warning on/off, see sections

“During calls” and

“Adjustments”.

Control key (up)

Scroll up through menus or

name list.

Move left in choices.

1 / Space

Space, hyphen, etc.,

when editing text.

Battery

See section “Installation”.

Star / Pause / Text case

Insert a dial tone pause.

Upper/lower case in text mode.

Charging connectors

See section “Installation”.

Warning Light

Ringing, message waiting, battery low, exit cover area.

Earpiece

Display (3 rows)

Display at rest. Work is the network name and 123 is (your) extension number. See section ”Description/ Display info”.

On/Off / On hook / No

Switch on/off, end call, one menu back. Cancel a menu option.

Control key (down)

Scroll down through menus, name list. Move right in choices.

Keypad

Internal call key

Connect to other portables when used in a home environment. Not used in the MD110 system.

R-key

Put call on hold (inquiry), take call off hold. See section “During calls”.

Microphone

Description

DT288

Display info

The display gives you visual feedback on all actions that you perform, and also textual warnings. The upper two rows are text rows (12 possible characters in each row), showing menus that you can access, names and numbers that you edit or dial, your telephone id etc. The lower row displays different states, visualized by icons. For more information see section “Display information”.

Text row signs

Menu pointer / Diversion indicator

Shows the menu that can be accessed by pressing yes. When displayed before a name or number it indicates that the telephone is diverted to another extension.

Number too long for display

There are more digits to the left.

Dash

Indicates that a pause is programmed in the telephone number.

Exclamation Mark

Marks an unread entry in an entry list.

–

Description

DT288

Icon row signs

Signal strength

On when your telephone is locked to the system. The bars indicate reception quality. Four bars indicate optimal reception.

Ringer off

On when the ringer is suppressed or switched off.

Message

Flashes when messages are received.

Call

On when your telephone is off hook and flashes during ringing.

Battery charging indicator

The battery cells are flashing sequentially when the battery is being charged and is on when charging is completed. Indicates the amount of talk and standby time left.

Key lock

Indicates that the key pad is automatically locked 1 minute after being used.

Who Called list indicator

Indicates a new unanswered entry in the Who Called list.

Description

DT288

Display menu

Your cordless telephone is menu-driven. Each menu forms a loop.

Navigating the menus

You can activate the menus by pressing the Control up key or the Control down key. These keys are also used to scroll through the menu structure.

The CLR, YES and NO keys are used to reach the desired option.

Confirm Cancel Cancel

Control up Control down

Description

DT288

Menu structure

New Call

DialMode

Options available when:

On hook

AddNew AddWhoCall* AddLastDial*

PhoneBook

Voice:X*

Handset

Networks

Information

AutoKeyLock Alerts

PhoneLock DirectCall MasterReset Language Display AutoIntern

Off hook

Applicable only if entries are available

Internal External CallBack Message Page

Click Silent

PowerOn Subscript ChangePIN

SelectNet* Priority* Rename* Delete* ReSubscribe Subscribe

WhoCalled* LastDialled* LastCall TotalCalls ShowIPEI

Find&Call WhoCalled* LastDialled*

GotoDTMF SendTones SendPause

Find&Call Store

Find&Edit DeleteAll

Edit Delete

RingVolume RingType

KeySound DiscreetRng

Light Contrast

Switching On/Off

DT288

Switching On/Off

Switch on

Press until the display lights up

If your telephone does not switch on or the battery icon starts flashing, the battery is low. Charge the battery. While charging, you can use your telephone normally.

Note: If the signal strength icon is off and the message

No Network is displayed you cannot make or answer

calls. See section “Troubleshooting”.

Switch off

Press until the display turns blank

Note: During calls, you cannot switch off your telephone.

Free Seating

DT288

Free Seating (optional)

The free seating function is used for persons who have an office extension number but no telephone set of their own. For example, flexible office workers, persons mostly working outside the office, etc. As a free seating user and working from the office, you logon to any free telephone set that temporarily will be assigned with your extension number and your system authorities.

To log on:

Press

Enter the authorization code and press

Enter your telephone number and press

Wait for the call timer to start in the display

Press to finish the procedure

The display shows your telephone number.

To log off:

Press

Wait for the call timer to start in the display

Press to finish the procedure

Note: An earlier version of the free seating function use

other procedures: To log on, press *10*extension No. #. To log off, press #10#.

Incoming Calls

DT288

Incoming Calls

Answer calls

A ringing signal indicates an incoming call and the warning light flashes quickly. The ringing type tells you whether the call is an internal, external or call back call and the display indicates an incoming call.

Display example:

Press to answer

If the telephone rings at an inconvenient moment:

Press to suppress ringing for the moment

Note: Calls can be answered at any time, no matter if

you are programming, or keying in a number etc.

Press to end the call

For another extension

You can answer a call to another telephone. When the telephone rings and there is nobody to answer the call:

Call the ringing extension and press

Busy tone.

Press

Note: France-press 4; Sweden-press 6

4736

Outgoing Calls

DT288

Outgoing Calls

Make calls

How to make internal and external calls.

Notes:

- Correct a wrong entry by pressing the CLR key.

- If you decide not to make the call while keying in the number, press NO to stop.

- If you receive a call while keying in the number, simply press YES to answer.

- You can make your calls faster by using abbreviated numbers or call-by-name.

Internal calls

Dial the extension number and press

External calls

Dial the digit or digits to get an external line

Dial the external number and press

To insert a pause if you have to wait for dial tone:

Press

Your telephone will go off hook and dial the number. On the display the duration of the call is shown.

Outgoing Calls

DT288

Off hook dialling

If you prefer to dial a number off hook:

Press

Dial tone.

Dial the number

To end calls

Press

Last external number redial

When you initiate an external call the system automatically stores all the dialled digits, irrespective of whether the call was successful or not.

***

Press to redial the saved number

The last external number is automatically redialled.

Note: Sweden and Finland-press **0 YES.

Redial number from LastDialled list

The last twenty dialled numbers are memorised by your telephone. You can redial one of these numbers by selecting the number from the LastDialled list.

Select Information and press

Select LastDialled and press

Scroll, select number and confirm

A number marked with a ! means a new number. You can store numbers permanently by adding them to your phone book. See section “Phone book”.

Note: The LastDialled list will be cleared if the power of your telephone is lost (e.g. if you remove the battery).

Outgoing Calls

DT288

Call number from WhoCalled list

Your phone keeps a list of people who have called you (if supported by the network). Whenever there are entries in the list, you can view or call back a number with the WhoCalled option. If the “Who Called list indicator” is shown in the display, there are one or more new numbers added since the last time you entered the WhoCalled list.

When the phone is switched off, the WhoCalled list is erased.

Numbers in the WhoCalled list can be added to your Phone Book, see section “Phone Book”.

To call

Select Information and press

Select

WhoCalled and press

The last caller’s number is displayed. If the number is in your Phone Book, the associated name is displayed instead.

Scroll to find the number or name you want to call back and press

Press to end the call

Note: If

Check Who Called? is shown in the display,

you can view the last caller’s number by pressing YES. To call the number, press YES once again.

During Calls

DT288

During Calls

Mute microphone

To mute the microphone during an ongoing conversation:

Press and hold

The caller will not hear what is being said in your room.

Press shortly, to turn the microphone off

Short beeps confirm that the microphone is off.

Press again, to turn the microphone back on

Mute warning signal

If a warning sounds during an ongoing call, e.g. when the battery runs low, you can turn off the signal temporarily.

Press shortly

Note: When a warning occurs during a call and you want

to mute the microphone, the first press always mutes the warning sound. The second press mutes the microphone.

During Calls

DT288

Inquiry

You have speech connection and want to make an inquiry to an internal or external party.

Press

Dial tone.

Call the second party

The first party is put on hold. When the other party answers you can switch between the calls (refer back), transfer the call, create a conference or end the call.

Press to end the inquiry call

The second party is disconnected.

Press to return to the first party

Refer back

Press to refer back to the other party

The party you talked to is put on hold, the other party is connected.

Note: Sweden - press R to refer back to the other party.

During Calls

DT288

Inquiry via the PhoneBook

If you don’t know the number by heart, you can make an inquiry to a second party in the Phone Book during a call.

Select

NewCall and press

Select

Find&Call and press

(name) Enter the first letters of the name and press

Scroll to find the name and press

The first party is put on hold and the second party is dialled. When the second party answers, you can switch between the calls (refer back), transfer the calls, create a conference and end one of the calls.

Press to end the inquiry call

The second party is disconnected.

Press to return to the first party

Transfer

You want to transfer an ongoing call.

Press

Dial tone.

Call the second party

Press before or after answer

The ongoing call is transferred.

Note: If you have put more than one call on hold the last call that was put on hold will be transferred. If the dialled extension is busy or transfer is not allowed, your telephone will ring again.

During Calls

DT288

Conference

With this procedure you can include up to seven parties in a conference. Only the conference leader can admit participants. During the conference a tone will be heard every 15th second.

Note: The conference tone might be disabled for your system.

You have an ongoing conversation and want to establish a telephone conference. You will become the conference leader.

Press

Dial tone.

Call the second party

Wait for answer.

Press to establish a conference

Repeat the procedure to add more conference members

Press to leave the conference

On hold

You can temporarily put the ongoing call on hold. Calls put on hold can be resumed on your own telephone or another.

Press

Dial tone.

Press

To resume the call

Press within 30 seconds

If not resumed within 30 seconds you will be called back. An unanswered external call will be re-routed to the operator after another 30 seconds.

During Calls

DT288

To resume on another extension

Call the extension where the call was put on hold and press

Busy tone.

Press

Note: France - press 4; Sweden - press 6.

Dialling during a connected call

When calling interactive tele-services, e.g. telephone banks, you need to use Dual Tone Multi Frequency (DTMF) signals. If your exchange is not already programmed to automatically convert your entered digits into DTMF signals, you need to activate the function during the call.

During an ongoing call:

Press and dial the required digits

Note: Finland - press 1 and dial the required digits.

When You Receive a Busy Tone

DT288

When You Receive a Busy Tone

Busy extension or external line

If you call an extension and receive a busy tone or get no answer or all external lines are busy, you can use these methods:

Automatic callback, extension

If a called extension is busy or there is no answer:

Press

Note: France, Sweden and Finland - press 5.

Press to finish the procedure

You are called back (recall ringing signal) when the ongoing call is finished or the next time a new call is finished. You have to answer within eight seconds, otherwise the callback service is cancelled.

Press when you are called back

The system calls the extension.

Note: Callbacks can be activated on several extensions at the same time.

When You Receive a Busy Tone

DT288

Automatic callback, external line

If all external lines are busy when YES is pressed after dialling the digit or digits to get a line and the external number (Onhook dialling):

Press

Notes:

- France, Sweden and Finland - press 5#.

- If you were dialling Offhook (YES was pressed before the digit or digits to get a line), you are required to add the external number now.

Press to finish the procedure

When an external line becomes free you will be called back (special ringing signal). You have to answer within eight seconds otherwise the callback service is cancelled.

Press when you are called back

The system calls the external number.

Note: Only one callback can be activated on a busy external line.

Cancel any single callback

Press and dial the extension number

Note: To cancel a single callback on a specific external

line, dial the digit or digits to get a line instead of the extension number.

Press

Wait for the call icon to stop flashing

Press to finish the procedure

When You Receive a Busy Tone

DT288

Cancel all callbacks

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Activate call waiting

If you urgently wish to contact a busy extension or a busy external line, you can notify it by a call waiting signal.

Press

Note: France and Finland - press 6; Sweden - press 4.

Keep your telephone off-hook

When the called extension or the external line becomes free, it will be called automatically.

Note: The call waiting function might be blocked for use on your extension (programmed by system administrator). If call waiting is not allowed you will continue to receive a busy tone.

Intrusion on a busy extension

You can intrude on an ongoing call on a busy extension.

Press

Note: France and Sweden - press 8.

Before the intrusion is executed a warning tone is sent to the parties in the ongoing call. A three party call is established and a warning tone is heard.

Notes:

- The warning tone might be disabled for your system.

- The intrusion function might be blocked for use on your extension (programmed by system administrator). If intrusion is not allowed you will continue to receive a busy tone.

Call Forwarding

DT288

Call Forwarding

Internal follow-me

All calls to your extension are diverted to an extension of your choice (within the private network). During follow-me the display shows a

> after your number. On the next row the answering

position number is shown. You will also hear a special dial tone that indicates that your line has follow-me. You can still make calls as usual

Order

Press and dial the answering position number

Note: U.K..- press *2*and number.

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Display example:

4736 > 4321

Call Forwarding

DT288

Cancel

Press

Note: U.K. - press #2#YES.

Wait for the call icon to stop flashing

Press to finish the procedure

External follow-me

If external follow-me is allowed you can have all calls to your extension diverted to an external number of your choice. During follow me the display shows a

> after your number. You will also

hear a special dial tone that indicates that your line has follow me. You can still make calls as usual.

Order

Press

Dial the digit or digits to get a line and the external number

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Display example:

4736 >

Call Forwarding

DT288

Cancel

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Bypass diversion

If bypass diversion is allowed from your extension, you can bypass an activated diversion/follow-me on a specific extension.

Press

Dial the extension number

Press and wait for answer

Call Forwarding

DT288

Personal number

With this function you can be reached on your normal office telephone number even if you are in another room, out of the office, at home, etc.

Depending on the functionality of your office exchange, you have either one individual single search profile (standard) or you can choose between five individual search profiles (optional). A search profile can be designed to fit the situation, i.e. In the office, On travel, At home, etc. Both internal or external telephone numbers can be used in a profile.

On your request, the search profiles are programmed or modified by the system administrator. See section “To design and order your search profiles”.

When the function is activated, incoming calls are transferred to different telephones or back-up services in your decided order. If an answering position in the profile is busy, the call can be transferred to another predefined position in the profile, i.e. voice mail or a colleague. You can activate the function from your own office telephone, or when out of the office by using the Direct Inward System Access function (DISA).

Note: If the operator is included in the activated profile as an answering position, always inform the operator if you are absent. Use the absence information function or call the operator. If voice mail is included in the activated profile, always update your greeting with absence information.

To activate or change to another profile from your office telephone

Press

(1-5)

Dial the search profile digit

Press

Wait for the display to show the chosen search profile digit.

Press to finish the procedure

Call Forwarding

DT288

To cancel from your office telephone

Press

Wait for the call icon to stop flashing

Press to finish the procedure

To activate or change to another profile from an external telephone

The external telephone must be of push button type provided with hash (#) and star (*) keys or a mobile telephone adapted for

dial tone pulses (DTMF).

Call the DISA function at your office

Dial tone.

Press

Enter the authorization code and press

Dial your own extension number and press

Dial tone.

Press

(1-5)

Dial your own extension number, press and dial the search profile digit

Press and end the call

Call Forwarding

DT288

To cancel from an external telephone

The external telephone must be of push button type provided with hash (#) and star (*) keys or a mobile telephone adapted for

dial tone pulses (DTMF).

Call the DISA function at your office

Dial tone.

Press

Enter the authorization code and press

Dial your own extension number and press

Dial tone.

Press

Dial your own extension number, press and replace handset

To design and order your search profiles

The search profiles are installed or changed by the system administrator. In order to set up your profiles, copy the setting form, fill in your new or changed profiles and give it to your system administrator.

Note: If personal screen call server is connected to your system, you can edit the profiles via your Intranet. See instructions for the server!

Important notes when designing your search profiles:

• Avoid a ringing time longer than 45 seconds for your profiles

Usually the caller hangs up after 3-6 ringing signals. If you need a longer ringing time, the maximum time is 60 sec.

• Consider the time you need to react and answer on each answering position in your profiles

You might need up to 15 seconds to react and answer on a desk or cordless telephone and 20-25 seconds for a mobile telephone.

Call Forwarding

DT288

• There must be an answering position at the end of every profile

(voice mail or operator/secretary)

If not, calls might end up unanswered.

• Consider what should happen when you are busy on a telephone

The available options are:

• Diversion to Voice mail • Diversion to the operator

• If an answering machine, a FAX or other answering service is used

as an early answering position, it might interrupt the searching

Disconnect the answering service, or design the ringing times so they do not affect the searching.

• If your system admits just one single personal profile, design

the profile only with your 2-3 most frequently used positions

If you add more numbers, there is a risk that the caller hangs up before a late position is called.

• If your system admits 1-5 personal profiles, design the different

profiles to fit your most used positions

Make sure you use as few answering positions as possible for each profile. Profile examples:

• In office • At home

• On travel • Absent/not reachable

Example:

How to fill in your setting form for search profiles:

Profile 1 In office

Search Type of telephone or Telephone number Ringing time order answering position* (seconds)

1 Desk 1234 10 2 Cordless 5234 15 3 Voice Mail

* Examples: Desk, Cordless, Mobile, External, Voice Mail, Operator, etc.

Profile 2 At home

Search Type of telephone or Telephone number Ringing time order answering position* (seconds)

1 External 222222 20 2 Mobile 0706666666 25 3 Voice Mail

Call Forwarding

DT288

Setting form for search profiles

Name: .............................................................. Department: ......................

Telephone No:.................................................. Account:............................

Profile 1 ......................

Search Type of telephone or Telephone number Ringing time order answering position* (seconds)

1 2 3 4

* Examples: Desk, Cordless, Mobile, External, Voice Mail, Operator, etc.

Profile 2 ......................

Search Type of telephone or Telephone number Ringing time order answering position* (seconds)

1 2 3 4

Profile 3 ......................

Search Type of telephone or Telephone number Ringing time order answering position* (seconds)

1 2 3 4

Profile 4 ......................

Search Type of telephone or Telephone number Ringing time order answering position* (seconds)

1 2 3 4

Profile 5 ......................

Search Type of telephone or Telephone number Ringing time order answering position* (seconds)

1 2 3 4

Internal Messages

DT288

Internal Messages

Manual message waiting (MMW)

If the called extension does not answer you can initiate a message waiting indication on that extension (if this function is allowed).

Order MMW to another extension

Press and dial the extension number

Press

Wait for the call icon to stop flashing

Press to finish the procedure

The message symbol lights up on the called extension.

Cancel MMW to another extension

Press and dial the extension number

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Internal Messages

DT288

To listen to received messages

When your telephone beeps and the message symbol is flashing in the display:

Select

Voice:3

The digit shows the number of messages stored.

Press to call the number that requested message waiting

Voice Mail

DT288

Voice Mail

Integrated voice mail (optional)

This function allows you to leave a voice message to the caller when you are unable to answer calls, e.g. when out of office, in a meeting, etc. Then the caller can leave a message in your mailbox. When back in office you can enter your mailbox and listen to received messages. You can choose to divert all incoming calls to your mailbox, calls when there is no answer, or calls when your telephone is busy.

When you enter your mailbox, you will hear recorded instructions how to handle listening, recording, storing and deleting messages, and how to change your security code.

To activate and deactivate your mailbox

See section “Call forwarding - internal follow-me” (function code 21). Use the number to the voice mail system as the “answering position number”.

To enter your mailbox when there is a new message

The message icon is flashing in the display. The voice mail ringer tone sounds when a new message is received.

Select

Voice:x and press

(x=number of received messages).

If you are asked to enter your security code:

Enter your security code

Code at delivery = your extension number.

Voice Mail

DT288

To enter your mailbox in general

When you want to listen to saved messages, change your security code or change your greeting.

Enter the number to the voice mail system and press

If you are asked to enter your security code:

Enter your security code

Code at delivery = your extension number.

To enter someone else´s mailbox

Enter the number to the voice mail system and press

If you are asked to enter your security code:

Press

Enter the mailbox number

Normally the office extension number of the person served.

If you are asked to enter a security code:

Enter the security code of the person served

Voice Mail

DT288

To handle the mailbox

Recorded information on the line informs about the number of new and stored messages. If you have too many messages stored, you will first be asked to delete saved messages.

Recorded instructions ask you to press different digits in order to listen to caller’s messages, record your own greetings, change your password or exit your mailbox, etc.

The following diagram gives an overview of the mailbox system and the digits to be used.

5 6 3

5 6

5 6 7

Messages

Start level

Greeting

Security code

EXIT

, end with

Listen to the next message Repeat the heard message Delete the heard message Return to start level Exit the mailbox, end with

Listen to the current greeting Record a new, end with Leave the old greeting unchanged

Enter a new code,1-6 digits

Only digits are allowed, no star

No security code

Listen to the recording Re-record the greeting Store the greeting Leave the old greeting unchanged

Repeat the new code

Information

DT288

Information

Absence information (optional)

To be used during absence to inform callers about the reason and time or date of your return. If you are authorized, you can also enter absence information on another extension from your own extension.

Order

Example:Back on September 15th (=0915).

23*(0-9)

Press and enter the absence code

Note: The absence codes consist of one digit which

depends on the system connected to the exchange. Contact your system administrator regarding your available absence codes.

0915

Press and enter the date (MMDD) or time (HHMM) of your return

Note: If no return time or date is needed, this step can

be excluded.

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Display example:

4736 TRIP 15 Sep

Information

DT288

Cancel

Press

Wait for the call icon to stop flashing

Press to finish the procedure

The programmed information is erased.

Order for another extension

230

Press

Dial the extension number and press

(0-9)

Enter the absence code

0915

Press and enter the date (MMDD) or time (HHMM) of the other person’s return

Note: If no return time or date is needed, this step can

be excluded.

Press

Wait for the call icon to stop flashing

When the display on the other person’s extension shows the reason, and if entered, time or date of return:

Press to finish the procedure

Information

DT288

Cancel for another extension

230

Press

Dial the extension number and press

Wait for the call icon to stop flashing

Note: If the special dial tone is received, the authorization

code for the other extension is required. Add the code and press # before pressing NO.

Press to finish the procedure

Abbreviated Numbers

DT288

Abbreviated Numbers

Common abbreviated numbers

By using abbreviated numbers, you can make calls simply by pressing a few keys. The common abbreviated numbers consist of 1-5 digits and are stored in the exchange (by the system administrator).

Dial the common abbreviated number and press

Call-by-name

You can store frequently used numbers in the built-in Phone Book. To store, see section “Phone Book”.

To call:

Select

PhoneBook and press

Select

Find&Call and press

(0- 9)

Press repeatedly the key with the initial letter of the name until the letter is shown

To correct:

Press

If you have a lot of names starting with the same letter repeat the procedure to add the second, third, etc. letter of the name.

Press and scroll to find the name

Abbreviated Numbers

DT288

When the name has been found:

Press

The number of the name is dialled.

Press to end the call

Quick call-by-name

(0- 9)

Press the key with the initial letter of the name until a name is shown

To step to the next initial letters:

Press the key immediately again, shortly once, or for the 2nd next letter, shortly twice, etc.

Scroll to find the name

When the name has been found:

Press

The number of the name is dialled.

Press to end the call

Example:To call Bob.

(Anita, Bill and Bob are programmed in the phone book).

Press and keep pressed

Anita is shown in the display.

Press again, shortly

Bill is shown in the display.

Press

Bob is shown in the display.

Press to call Bob

Phone Book

DT288

Phone Book

You can create a personal directory with up to 100 names, which you can edit and erase. To use the names and numbers of the phone book to make calls, see sections “Abbreviated numbers”, “Call-by-name” and “Quick call-by-name”.

Enter names

Use the keypad to enter letters and characters. Press a key once for the first letter or character, twice for the second, three times for the third, etc. The most common letters are printed above each key on the telephone. All the available letters and characters are shown in the following table:

Characters

12345678910111213

Space

-?!,.:“‘()1

ABCЕДЖАБВГЗ2Γ

DEFÈÉÊË3∆Φ

GHI ÌÍÎÏ4

JKL5Λ

MNOСЦШТУФХŒ6

PQRSß 7ΠΣ

TUVÜÙÚÛ8

WXY Z Ÿ9

0+&@/ $%£ΘΞΨΩ

K e y

Phone Book

DT288

Note: Depending on the selected menu language, the character order may differ. For example when Greek is selected, Greek characters have precedence over less frequently used characters.

Press to switch a written character to lower case

The characters will be lower case until this key is pressed again.

When the required character is displayed, wait for the cursor to move automatically.

To correct:

Press

The character to the left of the cursor is cancelled and the correct character can be written.

To move the cursor:

Press to move the cursor to the left

Press to move the cursor to the right

Example (to write SMITH):

Select PhoneBook and press

Select

Store and press

Select AddNew and press

Phone Book

DT288

7777

Press for S

Press for M

444

Press for I

Press for T

Press for H

As this is an example:

Press to cancel

AddNew

Add a name

Select PhoneBook and press

Select

Store and press

Select

AddNew and press

(name) Enter the name and press

Enter the number and press

Phone Book

DT288

Add a name from WhoCalled or LastDialled lists

Select PhoneBook and press

Select

Store and press

Select AddWhoCall or AddLastDial and press

Scroll to find the required number and press

If it is necessary to edit the number:

Move the cursor and press to delete digits

Dial the correct digits and press

(name) Enter the name and press

Note for WhoCalled list: If necessary, edit the name.

Phone Book

DT288

Edit a name or number

Select PhoneBook and press

Select

Find&Edit and press

Select EditTelNo and press

(name) Enter the first letters of the name and press

Scroll to find the name and press

Move the cursor to position for editing, remove letters (from the left)

Enter new letters or digits and press

Move the cursor to position for editing, remove digits (from the left)

Enter new digits and press

Note: To skip a question, press YES to proceed.

Phone Book

DT288

Delete names and numbers

Select PhoneBook and press

Select

Find&Edit and press

Select Delete and press

(name) Enter the first letters of the name and press

Scroll to find the name and press

The name and number are deleted.

Group Facilities

DT288

Group Facilities

Call pick-up group

People working in a team can have their telephones programmed by the system administrator to form call pick-up groups.

In a call pick-up group, any member can answer any individual call to group members.

Press to answer

Notes:

- Sweden and Finland - press *0#YES.

- One call pick-up group can serve as an alternative to another group. Calls to the alternative group can only be answered when there are no calls to your own group.

Common bell group

Calls are signalled on a common bell.

Press to answer

Note: Sweden and Finland - press *0#YES.

Group Facilities

DT288

Group hunting

As a member of a group of extensions that is called by a common number, you can temporarily leave the group:

To leave the group

Press and dial your own extension number

Note: U.K..- press *2*and number.

Press

Wait for the call icon to stop flashing

Press to finish the procedure

To re-enter the group

Press

Note: U.K. - press #2#YES.

Wait for the call icon to stop flashing

Press to finish the procedure

Other Useful Facilities

DT288

Other Useful Facilities

Account code (optional)

This function is used to charge a call to an account number or to prevent unauthorised calls from your telephone. The account code can have 1 to 15 digits.

Press

Note: Norway and Finland - press *71*.

Enter account code and press

Dial tone.

Dial the digit or digits to get a line and the external number

Ongoing external call

When used to charge a call it is also possible to connect an ongoing external call to an account code.

During the call:

Press to put the ongoing call on hold

Dial tone.

Press

Note: Norway and Finland - press *71*.

Enter account code and press

Dial tone.

Press to resume the call that was put on hold

Other Useful Facilities

DT288

Night service

When the exchange is in night service mode, all your incoming calls to the operator are transferred to a selected extension or group of extensions. The exchange is equipped with four different night service modes:

• Common night service All incoming calls to the operator are transferred to one specific extension. Answer the call in the normal way.

• Individual night service Selected external calls to the operator are transferred to one specific extension. Answer the call in the normal way.

• Universal night service All incoming calls to the operator are transferred to a universal signalling device, e.g. the common bell. Answer the call as described in section “Group facilities - common bell group”.

• Flexible night service This function permits you to order an external line and connect it directly to your telephone. Ask your operator for the external line numbers.

Order flexible night service

Press and dial the digit or digits to get a line

Press and dial the external line number

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Other Useful Facilities

DT288

Cancel flexible night service

Press

Dial your own extension number

Press

Wait for the call icon to stop flashing

Press to finish the procedure

General cancellation

The following features can be simultaneously cancelled:

• Callback (all callbacks are cancelled).

• Internal and External follow-me.

• Manual message waiting/Message diversion.

• Flexible night service.

Order

001

Press

Wait for the call icon to stop flashing

Press to finish the procedure

Alarm extension

An extension can be programmed by the system administrator as an alarm extension. A call to an alarm extension obtains automatic intrusion if the extension is busy. Up to seven calling parties may be connected at the same time.

Other Useful Facilities

DT288

Emergency state

In the event of an emergency the operator can switch the exchange into emergency state, during which only pre-programmed extensions are permitted to make calls.

Malicious call tracing

If you are disturbed by malicious external incoming calls, you can request a number tracing from the network provider.

You can invoke tracing during or after an ongoing conversation. The external line can be held for a limited period of time.

Order

During an ongoing conversation:

Press

Dial tone.

Press

The system acknowledges with different tones whether the tracing request was accepted or rejected.

Direct Inward System Access, DISA (optional)

If you are assigned to use this function and you are working externally, you can call your office and get access to an external line in order to make business calls. The business call will be charged your office extension number or an account number. You will just be charged for the call to the office.

The external telephone must be of push button type provided with hash (#) and star (

) keys or a mobile telephone adapted for

dial tone pulses (DTMF).

After a completed DISA call you must hang up before a new DISA call can be made.

Depending on the type of authorization code and if an account code is used, different procedures must be used:

Other Useful Facilities

DT288

With common authorization code

Call the DISA function at your office

Dial tone.

Press

Enter the authorization code and press

Dial tone.

Dial the external number

With individual authorization code

Call the DISA function at your office

Dial tone.

Press

Enter the authorization code and press

Dial your own extension number and press

Dial tone.

Dial the external number

Paging

DT288

Paging (optional)

Persons equipped with a wireless paging receiver or assigned to a lamp signal, can be paged from a telephone set. Depending on the type of paging system it is possible to send digit messages or voice messages to the paged person.

Paging can also be initiated and answered during an ongoing call. Make an Inquiry call and proceed according to the appropriate procedure for the type of connected paging system. You can then either return to the ongoing call or transfer the paging call to the person that was put on hold. If this person is an external subscriber, your exchange must be programmed for this function.

If you receive a congestion tone when paging, this indicates that the paged person has his paging receiver in the charging rack and is probably out of the office.

Paging receivers without a display and paging via lamp signals

When there is no answer or a busy tone, keep the telephone off hook:

Press

Wait for an answer with the telephone off hook.

If you want to start paging without calling the person:

Press

Dial the extension number and press

Wait for an answer with the telephone off hook.

Paging

DT288

Paging receivers with a display

When there is no answer or a busy tone, keep the telephone off hook:

Press

Wait for the paged person to call back.

If you want to start paging without calling the person:

Press

Dial the extension number and press

Wait for the acknowledgement tone.

Press

Wait for the paged person to call back.

If you want to send a digit message code:

Press

Dial the extension number and press

Dial the message code (1-10 digits) and press

Wait for the acknowledgement tone.

Press

If expected, wait for the paged person to call back.

Paging

DT288

Paging receivers with voice message

When there is no answer or a busy tone, keep the telephone off hook:

Press

Leave your message after the tone. Just before the predetermined speech time is ended, a warning tone will be heard.

If you want to start paging without calling the person:

Press

Dial the extension number and press

Leave your message after the tone. Just before the predetermined speech time is ended, a warning tone will be heard.

Alarm paging

810

Press

Dial the extension number and press

Wait for the acknowledgement tone.

Press

If you want to send an alarm message code:

810

Press

Dial the extension number and press

Dial the message code (1-5 digits) and press

Wait for the acknowledgement tone.

Press

Paging

DT288

To acknowledge an alarm

You must acknowledge the alarm to be terminated:

820

Press

Dial your own extension number and press

Wait for the call icon to stop flashing

Press to finish the procedure

To acknowledge an alarm for another extension:

820

Press

Dial the other extension number and press

Dial your own extension number and press

Wait for the call icon to stop flashing

Press to finish the procedure

Authority

DT288

Authority

Do not disturb

Switch off your telephone. The caller will receive a special tone indicating that you are not available.

If you need to make calls, you can switch off the ringing signal. Press the CLR key until the ringer off icon is shown in the display. Press the CLR key again to switch on the ringing signal.

Authorization code, common (optional)

If you are assigned to use a common authorization code (1 to 7 digits) you can temporarily change any used telephone within the exchange to the authority level connected to this code. You can use the code for one call only or you can open the telephone for some calls and lock it when leaving the telephone.

To use for a single call

Press

Enter authorization code and press

Wait for verification tone.

Dial the digit or digits to get a line and the external number

Authority

DT288

Temporary unlock of an extension for a number of calls

Press

Enter authorization code and press

Wait for verification tone.

Press to finish the procedure

To lock an extension

Press

Enter authorization code and press

Wait for verification tone.

Press to finish the procedure

Authorization code, individual (optional)

If you are assigned to an individual authorization code (1 to 7 digits, assigned to your own extension) you can lock your own extension to a common authority level, e.g. when out of the office. You can also temporarily change any other used telephone within the exchange to the same authority level as you have on your own telephone.

The individual code can be changed from your own extension.

To lock your telephone

Press

Enter authorization code and press

Wait for verification tone.

Press to finish the procedure

Authority

DT288

To make calls with your authority level when your telephone is locked

Press

Enter authorization code and press

Wait for verification tone.

Dial the digit or digits to get a line and the external number

To unlock your telephone

Press

Enter authorization code and press

Wait for verification tone.

Press to finish the procedure

To assign your own authority level to another telephone

Press

Enter authorization code and press

Dial your own extension number and press

Wait for verification tone.

Dial the digit or digits to get a line and the external number

Authority

DT288

To change your individual authority code

Press

Enter old authorization code and press

Dial new authorization code and press

Wait for verification tone.

Press to finish the procedure

Settings and Adjustments

DT288

Settings and Adjustments

Key lock, automatic

To protect the key pad against accidental key pressing. When activated, the keys are automatically locked one minute after the telephone has been used.

To lock or unlock

Select Handset and press

Select AutoKeyLock and press

Select the required setting and press

When

LockOn is selected, the key lock icon is displayed after

one minute and you cannot make calls accidentally. You can only answer incoming calls.

To use when locked

When the key lock icon is displayed:

Press

UnLock keypad? is displayed.

Press to unlock the keypad temporarily

Settings and Adjustments

DT288

Key click

The key click, the acknowledgement sound when a key is pressed, can be enabled or disabled:

Select

Handset and press

Select Alerts and press

Select KeySound and press

The current setting,

Click or Silent, is shown on the display.

Select the required setting and press

Display light

The display illumination is automatically switched on when a key is pressed. The illumination can be enabled or disabled:

Select Handset and press

Select Display and press

Select Light and press

The current setting,

Automatic or Off, is shown on the display.

Select the required setting and press

Settings and Adjustments

DT288

Phone lock

To protect the telephone against use by another person:

Select

Handset and press

Select PhoneLock and press

Select:

•

PowerOn to prevent using the telephone without the

PIN code

•

Subscribt to prevent editing network subscriptions

Enter the PIN code and press

The current setting,

On or Off, is shown in the display.

Select the required setting

Press to confirm your choice

When the telephone is locked,

EnterPIN is displayed.

To use the telephone:

Enter the PIN code and press

Note: If an incorrect PIN code is entered three times, the

telephone will be blocked. To unlock a blocked phone, see section “Unlock a blocked telephone”.

Settings and Adjustments

DT288

Change PIN code

The default PIN code is 0000. The code can be changed from time to time. To change:

Select

Handset and press

Select

PhoneLock and press

Select

ChangePIN and press

EnterOldPIN is displayed.

Enter the old PIN code and press

EnterNewPIN is displayed.

Enter the new PIN code (4 digits) and press

Enter the new PIN code again and press

New PIN accepted is displayed for two seconds.

The PIN code is changed.

Unlock a blocked telephone

Your phone will be blocked if an incorrect PIN code is entered three times (the display shows

PINBlocked Unblock?).

To unlock a blocked telephone, the IPEI code and a new PIN code must be entered:

Press

Backdoor: is displayed.

Enter the IPEI code and press

EnterNewPIN is displayed.

Enter a new PIN code (4 digits) and press

Enter the new PIN code again and press

New PIN accepted is displayed for two seconds.

The PIN code is changed.

Settings and Adjustments

DT288

Direct call

You can set your telephone to call a programmed number when any key is pressed. To be used temporarily, e.g. as an alarm or an emergency number.

Note: When direct call is activated the automatic key lock is deactivated.

To activate

Select Handset and press

Select DirectCall and press

Enable Direct Call? is displayed.

Press

DirectC.No is displayed. If a direct call number has previously

been set, the number is displayed.

Enter the direct call number and press

If the displayed number is to be used again, press YES.

Display example:

To call

Press any key on the telephone

DirectCall 1234567

Settings and Adjustments

DT288

To cancel

It is important that the pause between key presses is not too long, as this will cause the direct call number to be dialled. Therefore the pause between each key being pressed should be as short as is possible.

Select Handset and press

Select DirectCall and press

Disable Direct Call? is displayed.

Press

You must press within two seconds to prevent the direct call number being dialled.

Language

The default language is English. To change to another language:

Select

Handset and press

Select

Language and press

Scroll until you find the required language

Press to confirm

Note: To update the chosen language with the language

of the exchange, the telephone must be switched Off and On once. However, if the chosen language is not supported by your exchange, you will continue to receive some of the information in English.

Settings and Adjustments

DT288

Display contrast

The display has eight contrast levels to make the display easier to read.

Select

Handset and press

Select

Display and press

Select

Contrast and press

The contrast level bar is displayed showing the current level.

Adjust the contrast

A beep is heard when the maximum or minimum contrast is reached.

Press to confirm

Earpiece volume

Use the volume keys to change the volume of the earpiece during a call.

Press to change the volume

Settings and Adjustments

DT288

Ringing signal volume

Your telephone has eight volume levels. At the lowest level the signal is switched off (indicated by the Ringer off icon on the display - incoming call is indicated by the Off hook icon and the warning light).

Select Handset and press

Select

Alerts and press

Select RingVolume and press

The volume level bar is displayed showing the current volume.

Adjust the volume

A beep is heard when the maximum or minimum level is reached.

Press to confirm

Audible Signals

DT288

Audible Signals

The following different tones and signals are sent from the exchange to your telephone.

Tone characteristics

The tones shown in this section are the most used tones worldwide. Many markets use a differing tone for one or more situations. If you get a tone that is not described or you cannot identify, ask your system administrator.

Dial tone

Special dial tone

Ringing tone or every 4th second Queue tone

Busy tone

Congestion tone

Number unobtainable tone

Call waiting tone

Intrusion tone

Conference tone every 15th second (to all parties)

Verification tone

Warning tone, expensive route

Audible Signals

DT288

Ringing signals

Three different ringing signals inform you about the type of the incoming call. The signals shown in this section are the most used signals worldwide. Many markets use a differing signal for one or more situations. If you get a signal that is not described or you cannot identify, ask your system administrator.

Internal ringing signal

External ringing signal

Recall signal

(automatic callback reminder)

Note: If you use a melody for the external or recall ringing signal, the melody will be repeated in the same way as for internal calls.

Audible Signals

DT288

Ringer tones and melodies

You can change the ringer tone for the different types of calls.

Select Handset and press

Select

Alerts and press

Select

RingType and press

Select type of call and press

Internal, External, CallBack, Message or Page is

displayed.

Select sound or select melody 1-6:

Every time you press the key, the next sound or melody will be heard:

Low Medium High Mixed Melody 1: Jumpy Melody 2: Eine kleine Nachtmusik Melody 3: Toccata Melody 4: Für Elise Melody 5: Samba Melody 6: Blues Rhythm

Press to confirm your choice

Audible Signals

DT288

Discreet ringing

The first three ringing signals will ring at the lowest audible volume level. To be used, e.g. if you are in a conference and you expect an important call.

Select Handset and press

Select

Alerts and press

Select

DiscreetRng and press

The current setting,

On or Off, flashes on the display.

Select the required setting and press

No ringing

Incoming calls are indicated by the Off hook icon on the display and the warning light. To be used, e.g.when you do not want to be disturbed but want to make outgoing calls.

Press

The Ringer off icon is shown on the display.

To turn on the ringing signal, press the CLR key once again.

Display Information

DT288

Display Information

The display gives you feedback information such as traffic state and connected telephone numbers.

The following display examples show the different states of your telephone.

Idle telephone

Depending on the state and setting of your telephone, different information can be shown.

Normal:

“Work” is the programmed name of your network and can be renamed to something more suitable, i.e. your first name, company name, etc. To rename your network, select

Networks and

Rename from the menu. To the right of the display is your own

extension number.

Note: Date and time is only available for newer versions of the exchange.

Personal number profile activated:

The middle line shows the activated profile.

Work 4328 16-Mar 10:22

4328

Profile 1

Display Information

DT288

Follow-me activated:

The display shows your own extension number 4328 diverted to extension number 4444.

Outgoing call

Normal outgoing call:

When you make an outgoing call both the traffic state and the dialled number or name are displayed:

When the call is answered:

Diverted call:

If the dialled number is diverted, the diversion information is shown. For example, the display shows the dialled number 3333 (Smith) diverted to 4444 (Brown):

When the call is answered, only the number of the answering position is displayed:

Calling

3333

Calling

SMITH

4444

> 3333

4444

BROWN

> SMITH

4328 > 4444

Display Information

DT288

Incoming call

Normal incoming call:

If available, the number or the name of the caller is displayed. The examples show an incoming call:

When you have answered the call, the caller’s number is moved to the right of the display.

Diverted call:

A diversion indicator before the number or name informs that the call is diverted to your telephone. For example, the display shows that number 3333 (Smith) was dialled, but the call was diverted to you:

When you have answered the call, the display shows only the caller’s number.

A personal number profile is activated:

The first row shows the number or name of the caller. The second row shows the diversion indicator before your number or name:

When you have answered the call, the display shows only the caller’s number.

3333 SMITH

>3333 >SMITH

5432 >3333

NELSON >SMITH

Installation

DT288

Installation

Connecting the battery

Your telephone is supplied with a high capacity nickel metal hydride (NiMH) battery.

Note: An alarm sounds when there is less than 15 minutes calling time left in the battery.

Attach the battery to the telephone as shown in the figure

Note: Because the status of a newly received battery is

uncertain, it is recommended to charge it completely to ensure that you have sufficient talk and standby time.

Installation

DT288

Battery performance

The table below indicates the performance.

Talk time Standby time Charge time (hours) (hours) (minutes)

High capacity battery: 15 100 180

Clip on and unclip

Clip on and unclip the clip to/from the back of the telephone as shown in the figure

Clip connection:

Clip disconnection:

Note: Do not put your fingers on the display when you press. You can remove the clip, but do not do this too often, because this may wear out the fastening.

Installation

DT288

Connecting the charger

Connect the mains adapter to the charger and connect it to the mains outlet as shown in the figure

Charging the battery

When the battery requires charging, you will hear a warning sound and it is indicated in the display. See section “Battery performance” for information on charging time.

Connect the telephone to the charger as shown in the figure

The charging process will start automatically, indicated by a fast flashing battery icon and a green light on the charger. When charging is complete, the icon stops flashing and the green light is turned off.

Notes:

- Do not connect your portable to the charger without a battery.

- If the battery is completely flat it can take a few minutes before the green light on the charger is lit.

- If the standby time for your DT288 becomes too low, you should replace the battery.

- Only use the charger that is delivered with your portable to charge the battery.

TroubleShooting

DT288

TroubleShooting

This section contains information on how to solve common operational problems, and warnings you may receive.

Go through the following lists if you encounter any problems. If this checklist does not solve the problem, contact your system administrator. If others have similar problems, there may be a system error.

Fault Probable Action or

cause comment

No display The battery is low Charge the

or the telephone battery is defective

No ringing The Ringer off icon Off icon on=

is on or the tele- Turn on the phone is defective ringing signal

Signal strength Out of coverage Enter coverage icon off area or the system area or contact

or telephone the system is defective administrator

Battery icon and The battery is Charge the the warning lamp low battery flashes slowly

Call icon is switched The telephone is Contact the system off after 2 seconds defective administrator

Warning lamp Indicates a The display flashes slowly warning informs

Warning lamp The telephone is Contact the system steady light defective administrator

TroubleShooting

DT288

Display Probable Action or shows cause comments

PhoneBook No names stored Add names empty in the phone

book

Memory full The memory is Delete a name

full, you cannot add names

EnterXXX IPEI code or PIN Enter the

code is missing required IPEI or

No Access The network is in Re-subscribe

range, but no access rights

No Network Cannot connect Re-subscribe or

to the network contact the

system administrator

PINBlocked The phone is Press YES and Unblock blocked, i.e. the enter the IPEI

wrong PIN code code entered three times

Index

DT288

Index

Abbreviated numbers 41 Absence information 38 Account code 51 Alarm extension 53 Answer calls 13 Audible signals 72 Authority 60 Authorization code, common 60 Authorization code, individual 61 Battery 79 Busy extension or external line 22 Bypass diversion 27 Call forwarding 25

Bypass diversion 27 External follow-me 26 Internal follow-me 25 Personal number 28

Setting form for search profiles 32 Call number from WhoCalled list 16 Call pick-up group 49 Call-by-name 41 Change PIN code 67 Charger 81 Charging the battery 81 Clip on and unclip 80 Common abbreviated numbers 41 Common bell group 49 Conference 20 Connecting the battery 79 Connecting the charger 81

Description 6

Display info 7 Display menu 9

Menu structure 10 Dialling during a connected call 21 Direct call 68 Direct Inward System Access, DISA 54 Discreet ringing 75 Display contrast 70 Display information 76 Display light 65 Do not disturb 60 During calls 17

Conference 20

DTMF 21

Inquiry 18

Inquiry via the PhoneBook 19

Mute 17

Put a call on hold 20

Refer back 18

Transfer 19 Earpiece volume 70 Emergency state 54 External follow-me 26 Free seating 12 General cancellation 53 Group facilities 49 Group hunting 50 Guidelines 5 Important 4

Index

DT288

Incoming calls 13 Information 38 Inquiry 18 Installation 79 Integrated voice mail 35 Internal follow-me 25 Internal messages 33 IPEI code 4 Key click 65 Key lock 64 Language 69 Last external number redial 15 Mailbox 35 Make calls 14 Malicious call tracing 54 Manual message waiting (MMW) 33 Messages 33 Mute microphone 17 Mute warning signal 17 Night service 52 No ringing 75 On hold 20 Other useful facilities 51 Outgoing calls 14 Paging 56

Alarm paging 58 Paging receivers with a display 57 Paging receivers with voice message 58 Paging receivers without a display and

paging via lamp signals 56 Personal number 28 Phone book 43

Add a name 45

Add a name from WhoCalled or

LastDialled lists 46

Delete names and numbers 48

Edit a name or number 47

Enter names 43

Phone lock 66 Quick call-by-name 42 Redial 15 Redial number from LastDialled list 15 Refer back 18 Ringer tones and melodies 74 Ringing signal volume 71 Ringing signals 73 Settings and adjustments 64

Change PIN code 67 Direct call 68 Display contrast 70 Display light 65 Earpiece volume 70 Key click 65 Key lock 64 Language 69 Phone lock 66 Ringing signal volume 71

Unlock a blocked telephone 67 Short numbers 41 Switching On/Off 11 Tone characteristics 72 Transfer 19 Troubleshooting 82 Unlock a blocked telephone 67 Voice mail 35 Volume 70 When you receive a busy tone 22

Automatic callback, extension 22

Automatic callback, external line 23

Intrusion on a busy extension 24

Ericsson communications solutions

for enterprise networks combine and improve advanced ways of exchanging information via voice, data, video and evolving future media.

This requires a true understanding of how businesses and professionals interact— an understanding that goes far beyond meeting just the technological requirements.

Our customers include owners of small to large enterprise networks, local as well as multinational. We also offer solutions for Internet service providers.

We deliver quality of service over converged networks. We provide staff with full onsite and offsite mobility.

We integrate computer and telephony applications on the desktop. We enable coordination of all business interactions over the media of choice. In essence, we help businesses forge enduring relationships with customers.

Ericsson is the leading provider in the new telecoms world, with communications solutions that combine telecom and datacom technologies with the freedom of mobility for the user. With more than 100,000 employees in 140 countries, Ericsson simplifies communications for its customers - network operators, service providers, enterprises and consumers the world over.

EN/LZT 103 06 R1B

Subject to alteration without prior notice. Printed on chlorine free paper

Aastra DT288 User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Welcome

Table of Contents

Important

Description

Switching On/Off

Free Seating (optional)

Incoming Calls

Outgoing Calls

During Calls

When You Receive a Busy Tone

Call Forwarding

Internal Messages

Voice Mail

Information

Abbreviated Numbers

Phone Book

Group Facilities

Other Useful Facilities

Paging (optional)

Authority

Settings and Adjustments

Audible Signals

Display Information

Installation

TroubleShooting

Index