LG-Ericsson GDC- 480H User manual

Please read this guide carefully before
operating your new Wireless handset.
Retain the guide for future reference.
GDC- 480H/500H
Manuale Utente

GDC-480H/500H Wireless Handset
User Guide
Regulatory and Safety Notices
1. Radio Frequency Emissions:
FCC Compliance statement:
This device complies with Part 15 rules. Operation is subject to the following two conditions;
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause
undesired operation.
This Equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and the receiver.
•Connect the equipment into an outlet on a different circuit from that to which the receiver is
connected.
If problems persist, consult the dealer or an experienced radio/TV technician for help.
Canadian Compliance statement:
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
This device complies with Class B limits of Industry Canada. Operation is subject to the following two
conditions;
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause
undesired operation.
European Union Declarations of Conformity:
Ericsson-LG Enterprise Co., Ltd. declares that the equipment specified in this document, which bears
the “CE” mark, conforms to the European Union Radio and Telecommunications Terminal Equipment
Directive (R&TTE 1999/5/EC) including,
Electromagnetic Compatibility Directive (89/336/EEC) and
Low Voltage Directive (73/23/EEC)
The product fulfills the essential requirements of the harmonized standards shown above.
2. Product Safety Instructions
This product complies with and conforms to the following international Product Safety standards as
applicable:
Safety of Information Technology Equipment, IEC 6095-1, including
Relevant national deviations as listed in Compliance with IEC for Electrical Equipment (IECEE)
Safety of Information Technology Equipment, CAN/CSA-C22.2 No. 60950-1/UL 60950-1
3. E-911 and use of the GDC-480H/500H with Multi-Line Telephone Systems:
Please note the use and operation of this phone as part of a multi-line telephone system (MLTS) may
be subject to state and/or federal E-911 MLTS laws that require the MLTS to provide a caller’s
telephone number, extension, and physical location to applicable state and/or local emergency
services when a caller initiates a 911 call. The MLTS may not provide a caller’s telephone number,
extension, or physical location information to emergency services when a caller dials 911, and
compliance with state and/or federal E-911 MLTS laws is the sole responsibility of the purchaser of
this phone.
4. Privacy:
GDC-480H/500H implements security and encryption technologies appropriate for DECT however,
privacy of communications may not be ensured when using this telephone.

GDC-480H/500H Wireless Handset
User Guide
Important Care & Precautions:
Before connecting or using your new phone, take a moment to consider safety and reliability.
Use common sense when locating, connecting and using your GDC-480H/500H.
•The GDC-480H/500H uses 3.7 VDC Li-ion battery. Replace batteries only with
identical size and type available from your local Ericsson-LG Enterprise dealer. Use of
a different battery type may cause damage to the phone or charger and may cause fire
or explosion. Dispose of batteries in accordance with any local codes or regulation.
•The Charger/base unit should only be used on a dry level surface. Keep the
Charger/base away from the edges of the surface to avoid the potential of a fall.
•Avoid situations where you might drop the handset. While the GDC-480H/500H is a
rugged mobile device, dropping it on to the floor may cause critical damage.
•Locate cables to avoid potential for damage. For example, do not place under rugs or
carpet as damage may result from foot traffic or heavy objects. Also, do not locate
cables between the desktop and walls where they may be crushed, damaging the
insulation.
•Check cables regularly, and if damage is noted, disconnect your phone. Contact your
local representative for a replacement.
•Should liquid spill on the handset, remove the batteries and dry with a soft cloth.
•Do not use during lightning storms. Lightning presents a potential shock hazard.
•Clean the GDC-480H/500H with a soft dry cloth; do not use liquid cleaners.
•Always use caution when connecting to AC power. Use only with a properly grounded
standard AC power outlet.
What is new in this release?
Issue
Date
Change of Contents
1.0
1.1
1.2
1.3
April, 2013
July, 2015
April, 2016
November, 2016
- Initial Release
- Added the caution of Battery handling and
warranty information, etc.
- Updated VSF mail content
- Make the common user guide for GDC-
480H/GDC-500H.
- Updated ‘Placing a call on Hold’.
- Added ‘Control ANC strength’ feature.
Copyright© 2013 Ericsson-LG Enterprise Co., Ltd. All Rights Reserved
This material is copyrighted by Ericsson-LG Enterprise Co., Ltd. (Ericsson-LG Enterprise). Any unauthorized
reproductions, use or disclosure of this material, or any part thereof, is strictly prohibited and is a violation of
Copyright Laws. Ericsson-LG Enterprise reserves the right to make changes in specifications at any time
without notice. The information furnished by Ericsson-LG Enterprise in this material is believed to be accurate
and reliable, but is not warranted to be true in all cases. If you are not the intended recipient, you should
destroy or retrieve this material to Ericsson-LG Enterprise.
iPECS is trademark of Ericsson-LG Enterprise Co., Ltd.
All other brand and product names are trademarks or registered trademarks of their respective companies.

GDC-480H/500H Wireless Handset
User Guide
Important Safety Information
Important safety information that will help you safely use your phone. Failure to read and follow
the important safety information in this phone user guide may result in serious bodily injury, death,
or property damage.
WARNING: Violation of the instructions may cause serious injury of death.
CAUTION: Violation of the instructions may cause minor or serious damage to the
product.
CAUTION: Location and Environment for the Installation
•Install the product strictly following the user guide included in the product. If not, the
product would not function or its lifetime could be shortened.
•Avoid installing the product towards the direct ray of the sun or in locations exposed to
direct sunlight, on carpets or cushions. If not, the phone could be damaged, or fire or
electric shock could be caused.
•Avoid installing the product in dusty locations. If not, sand could be intruded into the
phone, and fire, electric shock or other product defects can occur.
•Avoid installing the product in the locations where a strong vibration exists. If not, the
product performance could decline or its lifetime could be shortened.
•Do not place vase, cosmetics or containers filled with water, milk or beverage in proximity
to the product. The liquid spilt out could cause fire, electric shock, malfunction, etc.
•Avoid installing the product near fire or in a small space with poor ventilation. If not, fire or
product defects could be caused.
•Do not put the phone inside a washing machine or a microwave. It could cause explosion,
problems, deformation or defects.
•Avoid installing the product on a shelf or a slanted surface. If not, the product could fall,
causing personal injuries or defects on the phone.
•Avoid installing the product close to other electronic products such as TV, audio
instruments, etc. It may cause some noises due to electromagnetic interference. Properly
install the base away from such products.
•Avoid installing or using the product near kitchen utensils such as cooking table,
humidifier, rice-cooker, etc., or in locations exposed to rain and wind or such places as
bathroom where water might be splashed. Electric shock, fire, deformation or product
defects could be caused.
WARNING: Power Supply
•Remove dust from the power plug pin and insert the power plug tightly into power
receptacle. If not, fire or electric shock could be caused.
•Do not use a damaged or loosened plug, and do not modify or damage the power cord.
Fire or electric shock could be caused.
•Do not connect a multiple number of cords into a single power connector. Fire or electric
shock could be caused.
•Do not touch the power plug with wet hands and grasp the power supply plug when
unplugging the power cord. Fire or electric shock could be caused.
•Do not cover the power cord and the adaptor with a pad, and do not place them near
heating instruments. Do not let children or pets bite the phone or the power cable. Fire or
electric shock could be caused.
•Use the adaptor that was included in the product package (See the product specification).
Check the rated voltage at home. Using other voltages may cause a fire.
•Ensure that the external cords of the phone are disconnected before it is moved from the
installation site. If not, fire or electric shock could be caused.
•Do not bend the power cord reluctantly, and do not place a heavy instrument on the
power cord. Fire or electric shock could be caused.

GDC-480H/500H Wireless Handset
User Guide
WARNING: Battery Handling
•Do not disassemble or revise the battery and do not use it for other purposes. Use the
specified battery and adaptor only. Fire or personal injury may be caused by heat or
rupture.
•If the battery is damaged, the battery liquid may leak out. Take care not to contact the
battery leakage. Keep it away from your eyes, skin or cloths. If there is any contact,
immediately clean it with water and take medical care as soon as possible.
•Dispose the used battery in a specified place. Improper treatment may cause an
unexpected accident.
•Do not apply impact on the battery by throwing it, and do not place it close to heating
instruments (microwave, heater). The battery liquid may leak out, or fire or explosion may
be caused.
•Never damage the shield tube nor contact the + and - pins of the battery with a metal.
Fire or physical injury may be caused by heat or rupture.
•Do not store the battery in locations exposed to direct sunlight or with high temperature
and humidity (store it in a room at 0°~ +40°). Deformation or explosion could be caused.
•Do not let children or pets suck or bite the battery. Putting the battery into mouth is
harmful for human body. Should a child swallow the battery, consult a physician as soon
as possible.
•If you detect smokes or a strange smell while using the phone or charging the battery,
unplug the power cord and contact the service center. Using it in such condition may
cause fire or an electric shock.
Caring for the Battery
Protecting Your Battery
The guidelines listed below help you get the most out of your battery’s performance.
•Recently there have been some public reports of phone batteries overheating, catching
fire or exploding. It appears that many, if not all, of these reports involve counterfeit or
inexpensive, aftermarket-brand batteries with unknown or questionable manufacturing
standards. Use only Ericsson-LG Enterprise approved batteries and accessories.
•In order to avoid damage, charge the battery only in temperatures that range from 32° F
to 113° F (0° C to 50° C).
•Do not use the battery charger in direct sunlight or in high humidity areas, such as the
bathroom.
•Never dispose of the battery by incineration.
•Keep the metal contacts on top of the battery clean.
•Do not attempt to disassemble or short-circuit the battery.
•The battery may need recharging if it has not been used for a long period of time.
•It is best to replace the battery when it no longer provides acceptable performance. It can
be recharged hundreds of times before it needs replacing.
•Do not store the battery in high temperature areas for long periods of time. It is best to
follow these storage rules:
-Less than one month: -4° F to 113° F (-20° C to 40° C).
-More than one month: -4° F to 113° F (-20° C to 45° C).
Disposal of Lithium Ion (Li-Ion) Battery
Do not handle a damaged or leaking Li-Ion battery as you can be burned.
For safe disposal options of your Li-Ion battery, contact your nearest Ericsson-LG Enterprise
authorized service center.
Special Note
Be sure to dispose of your battery properly. In some areas, the disposal of batteries in
household or business trash may be prohibited.

GDC-480H/500H Wireless Handset
User Guide
CAUTION: Operation
•Do not let anybody disassemble or alter the device other than qualified service personnel.
Contact the distributor and the customer service center for the inspection and repair. Fire,
an electric shock or problems could be caused.
•Do not touch the power plug during lightning storms. It can cause an electric shock or
death.
•Be careful not to let any foreign materials get into the product. In particular, if a staple
and pins are magnetized on the receiver, make sure to eliminate it before use. Using it in
such condition may cause fire, electric shock, or injury especially on the face.
•Do not drop objects or apply impact on the phone. The phone could be damaged, or
personal injury or product defects could be caused.4 Preparation Before Starting
•If you detect a burning smell or smoke, immediately stop using the product, disconnect
the power supply plug and the phone cable and contact the service center. Using it in
such condition may cause fire or electric shock.
•Pay attention not to let the phone contact with volatile substances (benzene, thinner,
alcohol, acetone, etc.) If not, fire, deformation or decolorization could be caused.
•Pay attention not to be stumbled over the phone cable or power cord. Accident, injury or
product defects could be caused.
•Do not let water penetrate into the product. Should water penetrate into the product,
disconnect the power supply plug and the phone cable and contact the distributor or the
service center. Using it in such condition may cause electric shock.
•Do not drop the phone during operation and do not throw it toward a person. If the
product is dropped and damaged, disconnect the power supply plug and contact the
distributor or the service center. The phone could be damaged, or accident, personal
injury or product defects could be caused.
•Avoid using the phone where there is a gas leakage. If there is a gas leakage, do not
touch the phone, phone cord and receptacle with hands and open the window for
ventilation. Flames may cause explosion, resulting in fire or burn injury.
•When the charging contacts are wet with water or stained with foreign materials, use the
product after wiping them with dry towel. Using it in such condition may cause accident,
injury or product problems.
•Do not cover the phone with wrap or vinyl for packing. The coating may peel away.
•Pay attention not to hurt with the edges or angles of the product, and be careful not to let
a child put the mic or power cord into the mouth. If not, it can cause an accident, injury or
product defects.
•Never place your ears in proximity to the speaker hole, nor insert a driver or

GDC-480H/500H Wireless Handset
User Guide
i
Table of Contents
1. Introduction .............................................................................. 1
1.1 Description..........................................................................................1
1.1.1 Handset............................................................................................................1
1.1.2 GDC-480H/500H Display .................................................................................4
1.1.3 Charger/base Unit ............................................................................................6
2Getting Started ......................................................................... 7
2.1 Unpacking the GDC-480H/500H ........................................................7
2.2 Installing the batteries.........................................................................9
2.3 Connecting the charger/base Unit....................................................10
2.4 Charging the handset without charger/base Unit..............................10
2.5 Installing the Belt Clip.......................................................................11
2.6 Installation of Wireless Terminal.......................................................11
2.7 Subscribing the GDC-480H/500H to a System.................................12
2.7.1 Enabling Subscriptions...................................................................................12
2.7.2 Subscribing to the System..............................................................................12
2.7.3 Terminating a Subscription.............................................................................13
2.8 Authentication...................................................................................14
3Using the Basic Features ...................................................... 15
3.1 Turning the GDC-480H/500H ON and OFF......................................15
3.2 Volume Adjustments.........................................................................15
3.2.1 Adjusting the Audio volume............................................................................15
3.2.2 Adjusting the Ringer volume...........................................................................15
3.3 Muting your Microphone...................................................................16
3.4 Control ANC Strength.......................................................................16
3.5 Placing an Outside Call ....................................................................16
3.6 Releasing a Call................................................................................17
3.7 Answering a Call...............................................................................17
3.8 Placing a Call on Hold ......................................................................17
3.9 Call Transfer.....................................................................................18
3.10 Do Not Disturb (DND).......................................................................18
3.11 Last Number Redial..........................................................................19
3.12 System Last Number Redial.............................................................19
3.13 Handset Speed Dial..........................................................................19
3.14 System Save Number Redial............................................................20
4Using Advance System Features ......................................... 20

GDC-480H/500H Wireless Handset
User Guide
ii
4.1 Program a System User Name.........................................................20
4.2 Request a Busy Station Call Back....................................................21
4.3 Leaving a Return Call Message........................................................21
4.4 Camping-on to a Busy Station..........................................................22
4.5 Linked Stations Pairs........................................................................22
4.6 Answering a Call Ringing at Another Station....................................22
4.7 Using Station Speed Dialing.............................................................23
4.8 Using System Speed Numbers.........................................................24
4.9 Call Forward .....................................................................................24
4.10 Pre-defined & Custom Text Messaging............................................25
4.11 Responding to a Message Wait Indication .......................................26
4.12 Blocking Outgoing Calls w/Temporary COS.....................................27
4.13 Paging ..............................................................................................27
4.14 Call Park...........................................................................................28
4.15 Conference Room.............................................................................28
4.16 Universal Night Answer ....................................................................29
4.17 Using the System Alarm Clock.........................................................29
4.18 To Register a System Access Authorization Code (PIN)..................29
4.19 Responding to an Authorization (PIN) Request................................30
4.20 System Voice Announcements.........................................................30
4.21 Using System Voice Mail..................................................................31
4.22 User Program Codes........................................................................31
4.23 Alarm message.................................................................................32
5GDC-480H/500H User Menu Features .................................. 33
5.1 Call Register (Call Log).....................................................................33
5.2 Display..............................................................................................34
5.3 Sound ...............................................................................................35
5.4 Phonebook........................................................................................36
5.4.1 Dialing from Phonebook .................................................................................37
5.4.2 Adding Records to the Phonebook.................................................................37
5.4.3 Modifying Records in the Phonebook.............................................................38
5.4.4 Deleting records from the Phonebook............................................................38
5.4.5 Searching the Phonebook with Find...............................................................39
5.4.6 Phonebook Upload/Download with PC...........................................................39
5.5 Bluetooth only for GDC-500H...........................................................43
5.6 Phone Settings .................................................................................44
5.6.1 Clock, Date and Time display.........................................................................44

GDC-480H/500H Wireless Handset
User Guide
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5.6.2 Alarm Clock....................................................................................................44
5.6.3 Keypad Tones ................................................................................................45
5.6.4 Language .......................................................................................................45
5.6.5 Silent Mode ....................................................................................................46
5.6.6 Keypad Lock...................................................................................................46
5.6.7 S/W Version ...................................................................................................46
5.6.8 Edit CO Code .................................................................................................47
5.6.9 Missed Call Mode...........................................................................................47
5.6.10 Range Out Beep.............................................................................................47
5.6.11 Clock Display..................................................................................................48
5.6.12 Auto Answer Mode.........................................................................................48
5.6.13 Auto Release Mode........................................................................................49
5.6.14 Emergency Call..............................................................................................49
5.6.15 Block Dialed Call ............................................................................................49
5.7 Phone Register.................................................................................49
5.7.1 Subscription....................................................................................................50
5.7.2 Base Choice...................................................................................................51
5.7.3 Modify PIN......................................................................................................51
5.7.4 Base ID...........................................................................................................51
5.7.5 Reset..............................................................................................................51
5.8 Appointment......................................................................................52
5.9 Direct Call.........................................................................................53
6Troubleshooting ..................................................................... 54
7Specifications ......................................................................... 55
8Dial pad Character Charts ..................................................... 56
9GDC-480H/500H User Menu .................................................. 58

GDC-480H/500H Wireless Handset
User Guide
1
1. Introduction
Thank you for selecting the Ericsson-LG Enterprise GDC-480H/500H Wireless handset.
With our GDC-480H/500H you will experience great in-building mobility with access to all of
the many features and functions of your Ericsson-LG Enterprise communication system.
This guide is intended to provide you with detailed information on the use of your new
Ericsson-LG Enterprise Wireless DECT handset.
GDC-480H/500H is a wireless handset that employs DECT technology to provide local in-
building mobility. Wireless Radio Frequencies (RF) signals are exchanged between the
handset and base stations (GDC-400B/600B/600BE). Multiple base stations connect to the
Wireless Management Interface (WMI) in your Ericsson-LG Enterprise phone system. The
WMI links the connected base stations forming a larger Base or Zone. Within this zone,
transparent handover of active communications between base stations in the zone is
supported.
The button and features are almost same between GDC-480H and GDC-500H. But GDC-
480H does not support Bluetooth feature and the model name is different.
1.1 Description
1.1.1 Handset
The GDC-480H/500H, shown in the Handset Diagram, appears much like a mobile cell
phone. On the front are the dial pad, a number of control buttons (described in the Handset
Buttons and Features list) and a large LCD display. In the lower rear of the unit is the battery
compartment. The battery charging terminals are located at the bottom of the unit. On the
right side of the GDC-480H/500H is the headset jack.
Handset Diagram

GDC-480H/500H Wireless Handset
User Guide
2
Handset Buttons and Features
Number
Button
Description
1
Navigation button:
Left arrow – idle state=view missed call, other states=left
navigation
Right arrow – Idle state=place call (host intercom dial tone),
active call state=press to Transfer call, or press and hold 1
second to place call on hold, in User Menu=right navigation.
Up and Down arrows – Idle state=Up for Local redial, Down
for Phonebook menu, active call state=adjust audio volume,
in User Menu=up and down navigation.
OK Button – Same as the Left soft button
2
Left & Right soft button: Interactive menu displayed directly
above buttons. Selection varies as needed. To select, press
the soft button directly below item.
3
Talk button: Connects handset to host system to answer
incoming or place outgoing calls.
4
Recall (Flash)/Clear button: active call state=register recall,
flash to regain dial tone; idle state=press to clear single digit
press and hold 1 second to delete all digits.
5
*
/Silent Alert button:idle and dial state=press to dial ‘
*
’,
press and hold 1 second to turn Silent Alert ON and OFF;
active internal call=camp-on from host.
6
Call back button:Leave a call back or recall message
7
End call & Power button: Press to end a call or reject a call,
press and hold 1 second to turn power ON & OFF.
8
0~9
Dial Pad buttons
9
#/Lock button: idle and dial state=press for ‘#’, press and
hold 1 second to lock dial pad.
10
Speed/Program button: Host dial tone=press to access
Station or System Speed dial, press and hold 1 second for
host program mode.
11
Side button: Adjust the Ringer volume and Audio volume.
12
Emergency button: Immediately call the designation number
in emergency situations.

GDC-480H/500H Wireless Handset
User Guide
3
GDC-480H/500H (rear view)
If an Ear Microphone/Headset is attached to a GDC-480H/500H, it can receive or release a
call. It is recommended to use a Headset meeting JIS C-6560 Specification. Press the button
on the Ear Microphone/Headset to receive an incoming call when ringing, and do the same
action to release the call. Making a call by using the Ear Microphone/Headset is supported,
too; press the button once on the Ear Microphone/Headset when in the idle state, then select
a number to dial from the redial list and the make the call by pressing the button.
 Note:
Using a noise canceling or unidirectional Ear Microphone/Headset, with an impedance below
1 KΩ (usually is 1-2.2KΩ) may cause abnormal operation (unit may self-answer without
pressing the button when an incoming call is received, and unit may hang-up unexpectedly
while using the Ear Microphone/Headset).
Warning
1) Do not insert any external substance except ear-microphone for GDC-
480H/500H in the hole. Inserting anything except for ear-microphone provided
by general maker may cause severe damage to the terminal.
2) Be careful not to let any foreign materials get into the product. In particular, if a
staple and pins are magnetized on the receiver, make sure to eliminate it before
use. Using it in such condition may cause fire, electric shock, or injury
especially on the face.

GDC-480H/500H Wireless Handset
User Guide
4
1.1.2 GDC-480H/500H Display
The GDC-480H/500H has a large 176 x 220 pixel full-color TFT LCD (Liquid Crystal Display).
The display indicates the status of the handset and provides visual feedback for dialing and
other actions. Various icons, detailed in the chart below, are shown at the top of the display.
The central area of the display shows messages from the host Ericsson-LG Enterprise
system and the phone itself. At the bottom are selections for the Left and Right soft buttons.
GDC-480H/500H Icons
Icon
Name & Description
Antenna Icon ( ) & RSSI Icon ( )
The antenna icon indicates a DECT connection is established with the
Base station.
The RSSI (Received Signal Strength Indicator) is a meter of the RF signal
strength received by the handset. The number of vertical bars (0 ~ 4)
indicates the relative strength. At less then 2 bars, call quality may not be
acceptable. When no vertical bars are present there is insufficient RF
signal to process signals and calls can not be placed or received.
Phone icon
Indicates the handset is off-hook, talking or dialing and a DECT channel is
established.
Silent Alert icon
Indicates the ringer in the phone is Off. The phone will visual notify you of
incoming calls and may alert you with the vibrator. See Images & Sounds
in the User Menu section.
Message icon
Indicates the system has at least one new message or callback message
for the wireless terminal. The message information is updated at 3 minute
intervals.
Alarm icon
When the message is sent from alarm server and the terminal receives it,
the terminal will be displayed in the screen.
Keypad lock icon
Indicates the phone dial pad and buttons are inactive. This prevents
accidental is buttons press as may happen with a wireless handset.
Alarm clock icon
Indicates an Appointment is set.

GDC-480H/500H Wireless Handset
User Guide
5
Icon
Name & Description
Battery icon
Vertical lines indicate battery charge state. At one (1) bar charging is
recommended, and call quality may be affected. When low battery (1 bar),
backlight will turn off to save battery power.
The last Icon means the battery is charging.
Bluetooth icon: only GDC-500H is available.
The Bluetooth is available if activation is Yes. S
o it allows you to use a
wireless headset. Using a headset permits you to move freely around
phone and maintain a conversation.
Bluetooth headset icon: only GDC-500H is available.
Before using the headset, the headset must be paired with GDC-500H
handset. The Bluetooth
headset icon is displayed if the paring is
successful.
Speakerphone icon
Speakerphone can be activated by pressing Hook off button during a call.
Additionally, you can switch between the handset and Speakerphone
during a call.
Common System and Handset Messages
System Messages
Message
Description
Display Duration
STA xxxx
Station number
Idle state
CALL FROM
STA xxxx
Station number of calling internal
user.
Alerting and active internal call
CALL TO
STA xxxx
Station number of called internal
user
Alerting and active internal call
HOLDING
STA xxxx
Station number of waiting call. Call on hold or transferring
LN XXX
RINGING
CO line number in host system Alerting
LN XXX
CO line number in host system
Active external call
NO CHANNEL
No RF or system channel available
Until a channel is available
INVALID
Station dialed is not valid
About 30 seconds
NO ANSWER
STA XXX
Called user does not answer About 30 seconds
NO RESP.
STA XXX
Called station is not responding,
perhaps power is Off
About 30 seconds
Handset Messages
Message
Description
Display Duration
Range Out
Out-of-range of a base station or not yet
subscribed to a system. Phone will not function.
Walls, buildings, and other obstruction, especially
large metal surfaces negatively impact useable
range between the handset and Base station.
Out-of-range or not
subscribed
No Channel
No available RF Channel in Base station
All RF channels busy
Silent Mode
Alert mode is vibrate, no audible ring is provide in
silent alert mode
Silent alert mode

GDC-480H/500H Wireless Handset
User Guide
6
Message
Description
Display Duration
Direct call
Handset is in a Direct call (Hotline)
Active on direct call
Keypad
Locked
The handset dial pad is locked; no outgoing calls
can be made.
Until handset is
unlocked
0~9, *, #, P,
D, R
Dialed digits and special characters.
(P -:Pause, D -:Go to DTMF, R -:Flash)
Dialing
1.1.3 Charger/base Unit
The Charger/base unit (p/n GDC-450SSC) is used to charge the GDC-480H/500H handset
and to house the handset when not in use. Terminals in the charger mate to terminals in the
bottom of the handset to allow the batteries to charge. Fully charged batteries provide about
12 hours of talk-time or about 80 hours of standby-time. To fully charge “dead” batteries
requires about 6 hours in the Charger.

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2 Getting Started
Before you can begin to use your new GDC-480H/500H you must unpack the unit, install the
batteries, charge the unit and register the item for service to your telephone system. This
section provides you the information needed to complete these steps.
2.1 Unpacking the GDC-480H/500H
Each GDC-480H/500H package contains the items below. These items include the GDC-
480H/500H handset, Charger/base, AC/DC adapter, Li-ion batteries, this User Guide and a
belt clip. Unpack the carton and assure all items are available.
GDC-480H package
Handset Charger/Base AC/DC Adapter
Batteries Quick Guide Belt Clip
Ear-Microphone

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GDC-500H package
Handset Charger/Base AC/DC Adapter
Batteries Quick Guide Belt Clip
Ear-Microphone

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2.2 Installing the batteries
The batteries are installed in the battery cavity in the rear of the unit. To install the batteries,
1. Remove the battery cover located on the rear of the unit. Press the latch at the top of
the cover and slide the cover down to remove.
2. Insert batteries. Assure the battery polarity matches the polarity in the battery cavity.
3. Place the cover on the unit just below the cavity and push the cover upward until the
latch is engaged.
4. The unit must be placed in the charger for approximately 6 hours to fully charge the
batteries.
Mode
Duration
Charging Time
Talk Mode
12 hours
Full charge 9 hours
Standby Mode
80 hours
 Note:
Poor care of batteries limits their useful operating life. Keep phone in the Charger/base
when not in use.
At low battery levels (less than 1 battery power bar), the display backlight turns OFF to
maximize battery charge.
Use only with batteries provided for the GDC-480H/500H. Use of other types
of batteries may cause harm to the unit or explosion.
Dispose of used batteries in accordance with local codes and regulations.
Battery Limited Warranty: we warrant 6 months from the date of purchase.
If the water damage sticker of the battery is normally white, but when it has
come in contact with water or a liquid containing water, it will turn fully red.
So if the battery has been damaged by liquid, the service for liquid damage
is not covered by the warranty.
Water damage sticker

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2.3 Connecting the charger/base Unit
The Charger/base unit must be connected to power using the supplied AC/DC Adapter.
1. Plug the DC output plug of the adapter into the DC input of the charger.
2. Insert the AC plug of the adapter into an AC outlet.
Use only the adapter provided with the unit. Use of a different adapter could
damage the unit or cause a fire and will invalidate your warranty.
2.4 Charging the handset without charger/base Unit
The handset can be charged without charger as below. Also it is available to charge
Handset during a call if Auto Release Mode is OFF.
 Note:
Use only the adapter provided with the unit. Use of a different adapter could
damage the unit or cause a fire and will invalidate your warranty. It is not
available to charge using USB port of PC.

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2.5 Installing the Belt Clip
The GDC-480H/500H comes with a belt clip that can be installed on the unit. To install the
belt clip, refer to the figure and instructions below.
When installing the belt clip:
1. Turn the screw clockwise on the back of the unit.
2. The belt clip is pulled upward until the screw is inserted into the hole securely.
When uninstalling the belt clip:
1. The belt clip is pulled down with pushing the button of the belt clip until the lock is
open.
2.6 Installation of Wireless Terminal
Before using the GDC-480H/500H, the wireless terminal must be subscribed to a System.
The subscription process must be conducted at the User Station, and at the Attendant
Station to ensure proper function of the wireless terminal. Proper Authorization Codes should
be obtained from the System Administrator or the Attendant before processing the
subscription (refer to Subscribing the GDC-480H/500H to a System).
The wireless terminal is allowed to be subscribed to up to 4 GAP systems. If a user wants to
subscribe to more than 4 systems, the wireless terminal first should be unsubscribed from
one of the systems. This subscription procedure can be performed by a User. There are two
methods to unsubscribe the wireless terminal from the key system:
The User can unsubscribe from the system and the wireless terminal at the same time
(details described in Terminating a Subscription).
The second method is to unsubscribe locally in the system or at the wireless terminal
separately.
Warning
If a user terminates their subscription at their terminal, the Attendant should be
notified so terminal information can be deleted from the System.