The 7420 handset will provide you with the
greatest possible degree of flexibility and
mobility due to high battery capacity, practical weight, size and design.
Please note that the 7420 handset is for use
with the following Nortel host systems:
• Norstar MICS 7.0 or greater (Modular
Integrated Communications System)
• Norstar CICS 7.0 or greater (Compact
Integrated Communications System)
• BCM 3.7 or greater (Business
Communication Manager)
Read all the information in this section
before you use your handset.
Handset information
Ensure that the adapter voltage is the
same as the electrical outlet voltage.
The 7420 handset uses radio signals
and does not guarantee a connection
in all circumstances. Do not rely on a
cordless handset to make emergency calls.
Never use your handset:
• in the vicinity of electrical
detonators
• in shielded rooms
• in areas where radio transmission is
forbidden
• in aircraft
Do not place a handset near:
• water, moisture or damp areas
• heat sources, direct sunlight or
unventilated areas
• devices which generate strong
magnetic fields such as electrical
appliances, fluorescent lamps,
computers, radios, televisions or
fax machines
• areas where the handset can be
covered, its ventilation impaired,
liquid spilled on the unit or objects
inserted into the handset through
any openings.
• areas with dust, vibration, shock or
temperature extremes
5
Check for small metal objects in the
handset earpiece/mouthpiece before
using the handset.
Do not store or locate flammable liquids, gases, or explosive materials in
the same compartment or vicinity as
the cordless handset, its parts or
accessories.
To protect the handset against drops,
we recommend to carry the handset
in a protective cover (A0553739 or
A0553740)
Battery information
Read the following information before
you handle the batteries:
• Do not replace the batteries in
potentially explosive environments,
such as rooms where flammable
liquids or gases are present.
• The battery will explode if disposed
of in a fire.
• Do not charge the batteries unless
you use the Nortel Networks
approved charger and the proper
batteries.
• Only use battery type NT7B65LD in
the 7420 handset. Do not use
these batteries with other products.
These batteries were designed
specifically for use with the 7420
handset and the 7420 charger
ONLY. Improper use of the
batteries may result in fire hazard.
• Do not do anything that would
cause the battery to short circuit.
• Do not let the battery or the charger
come into contact with conductive
metal objects.
6
Installing battery
The battery is connected to the handset when it is shipped from the factory.
1 To change the battery press down
the back cover and push it 5 mm
(1/5 inch) towards the headset
plug.
2 Lift off back cover.
3 Place the battery plug in the slot
in the battery box.
4 Insert battery with the label
readable.
5 Replace back cover.
7
Charging battery
When charging the battery for the first
time, it is necessary to leave the
handset in the charger for 14-16
hours for the battery to be fully
charged.
During normal operation, it takes
approximately 3.5 hours to charge the
handset from fully discharged to its
full capacity.
• Place the handset in the charger.
For correct charging, be sure the
room temperature is between 0°C
and 25°C. Do not place the
handset in direct sunlight. The
battery has a built-in heat sensor
which will stop charging if the
battery temperature is too high.
8
If the handset is turned off when
placed in charger, only the LED
indicates the charging. When
handset is turned off, the LED
flashes at a low frequency while
charging and lights constantly
when the charging is finished.
There will be no reaction on
incoming calls.
If the handset is turned on when
charging, the display shows the
charging status. The display goes
back to normal mode when fully
charged. It will not vibrate.
Auto-answer is inactive. The
handset reacts normally for
incoming calls.
It is necessary to recharge the battery
when the display shows BATTERY LOW, or if the handset cannot be
turned on. When the battery is fully
discharged, up to 10 minutes may
pass before charging begins (display
lights up). When the charger begins
the charging, status is shown in the
display if the handset is turned on.
Checking battery capacity
In the BATTERY MENU it is possible
to see the remaining battery capacity.
For reading the correct capacity, the
handset has to be removed from the
charger for at least one hour.
1 Press MENU () and use the <
or > keys to reach the BATTERY
MENU.
2 Press OK to enter the BATTERY
MENU, and see the current status
of the battery capacity.
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3 Press OK to return to the menu
system, or press MENU () to
quit.
The indication on the display is not
necessarily an exact reflection on the
remaining speech time, but only an
indication of the voltage on the battery.
Battery disposal
Defective batteries must be returned
to a collection point for chemical
waste disposal.
Warning: Nickel metal hydride
batteries must be disposed of
properly. Do not dispose of the
batteries in office or household waste.
Nickel metal hydride batteries are
recyclable. You can help preserve the
environment by returning your
unwanted batteries to your nearest
recycling center for recycling or
proper disposal.
Contact your system administrator for
more information about battery disposal and recycling centers in your
local area.
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About your 7420 handset
A
C
C
D
F
J
J
J
H
G
H
K
D
Message indicator light
A
Flashes when you have a
message waiting.
Volume control
B
Adjusts the handset and ringer
volume.
Display
C
Shows call information, handset
status icons, and guides you
through features and option
menus.
Headset connector
D
Microphone
E
B
I
L
E
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Keys F to L activate different
functions when your handset is
on hook or off hook.
On hook: Handset is idle (not in
use).
Off hook: Handset is active, call
or feature in progress.
Menu key
F
On hook
(idle)
Off hook
(active)
G
On hook
(idle)
Off hook
(active)
H
On hook
(idle)
Off hook
(active)
I
On hook
(idle)
Off hook
(active)
J
On hook
(idle)
Off hook
(active)
Enters the Handset
Options menu.
Activates a feature option.
< () key
Enters the Redial List
menu.
Activates a feature option.
> () key
Enters the Telephone
Book menu.
Activates a feature option.
OK ( ) key
Turns the handset off with
a long (three second) key
press.
Turns the microphone off
or on when you are on a
call.
Feature key
Turns the display on for
three seconds with two
rapid key presses.
OR
Starts a feature session.
Starts or ends a feature
session.
12
R () key
K
On hook
(idle)
Opens your message list
with a short key press.
OR
Enters the text message
(MSF-MAIL) menu with a
long (three second) key
press.
Off hook
Places calls on hold.
(active)
L
On hook
On/Off hook key
Turns the handset on.
(idle)
Off hook
Ends an active call.
(active)
Handset display
There are four lines on your handset
display.
Display information example
JEAN 2245
PETER called
NEXT CALL ERASE
(((.)))
Line 1
Line 2
Line 3
Line 4
The types of information shown on
the display are:
• Standby text: When the handset
is on hook (idle), your extension
name and number appears on the
first line of the display.
• Information text: Call or feature
information appears on the second
line of the display.
13
• Feature options: Feature options
appear on the third line of the
display.
Feature options vary, depending
on the type of call or feature in use.
• Handset icons: The following
icons appear on the fourth line of
the display:
The radio signal icon indicates
((.)))
connection to system.
Note: The icon flashes when
the system is busy and you
will not be able to make or
answer calls.
The envelope icon indicates a
new text message
(MSF-MAIL).
Left and right arrow icons
appear on the display when
you access Handset option
menus.
The telephone icon indicates a
call is active.
Note: The icon flashes when a
call connection is in progress.
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Display softkeys
s
Three display softkeys are used to
activate feature options that appear
on the third line of the display.
The following graphic shows the
softkey mapping for feature options
on the third line of the display.
Display softkey mapping example
NEXT CALL ERASE
2
13
Display softkeys
Display softkeys
Display softkeys
Display
Line 3
Display backlight
The display backlight automatically
turns on when there is an incoming
call, or if a key is pressed.
The backlight turns off after 10
seconds when the handset is idle.
You can disable the backlight to save
power, refer to the “Customizing
handset” section in this guide for
more information.
Note: The backlight is disabled when
the key lock function is activated.
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