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QUICK REFERENCE GUIDE 

Turning the Handset On/Off

1. Press and hold the 

On-hook

 key 

 

until “Switch on/off is displayed.
2. Press “Yes/No.”

Making a Call

Dial the number and press 

. The name 

of the called party is displayed if available.
OR

Press 

 to open the call list and use the 

Navigation key to scroll the list of your last 
twenty calls. Press 

 to dial.

OR
1. Press the 

Menu 

softkey.

2. Select 

Contacts

, and select 

Call contact. 

3. Select contact from list.

4. Press 

 or 

Call

 to dial the number. 

Answering a Call

• Press 

 to answer a call in normal 

mode.

 OR 
• Press the 

Handsfree

 key to answer 

in speaker mode.

Ending a Call

• Press 

to end a call.

Placing a call on Hold

1. Press the 

More

 softkey.

2. Select 

Hold/Retrieve

 to put the call on 

hold.

To retrieve the Held call:

1. Press the 

More

 softkey.

2. Select 

Hold/Retrieve

 to retrieve the call 

on hold.

Transferring a Call

 

1. Press the 

More

 softkey.

2. Select 

New Call

.

3. Dial the number to which you want to 

transfer the call and press 

Call.

4. Select 

Release 

to connect the two parties.

OR

Wait for an answer, announce the transfer 
and then select 

Release

.

Conference

1. Press the 

More

 softkey.

2. Select 

New Call

 to put the current call on 

hold.
3. Dial the number of the third party.
4. Wait for an answer.
5. Press 

More 

and then select 

Join 

to 

conference all the parties together. 

Rejecting a Call

• When the ring signal sounds, press 

 

Call information will be stored in the 
Call list.

Adjusting Volume Levels

To adjust earpiece volume 
during a call:

• Press upper and lower navigation key 

arrows to increase/decrease volume.

To change ringer volume:

• In the menu, select 

Settings. 

• Select 

Sound & Alerts

.

• Select 

Volume

.

 

• Use the navigation key arrows to adjust 

selected volume and press 

Back

 to save.

 
  

1

Earpiece Speaker

  

2

 Softkeys

  

3

Off-Hook Key

  

4

Voice Mail Access

  

5

Key Lock and Upper/Lower Case

 

 6

Space

  

7

Microphone

  

8

  Sound Off Key

  

9

Tactile Indicators

10

On-Hook and On/Off Key

11

Navigation Keys

12

Display

13

Headset Connector

14

  LED

  Signal Strength Indicator

 Battery Icon (fully charged)

 Battery Icon (discharged)

 Sound Off

 Loudspeaker On

 Loudspeaker Off

 Microphone Off

 Headset Connected

 Voice Mail

 Keypad Locked

 Phone Lock

 Microphone Muted

 Missed Call

 Incoming Call

 Outgoing Call

 System Connection

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MITEL

5603 Wireless Handset

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