Motorola TALKABOUT T4503 - Two-Way Radio Manual

Motorola TALKABOUT T4503 - Two-Way Radio Manual

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Motorola TALKABOUT T4503 - Two-Way Radio Manual

Safety and General Information

Important Information on Safe and Efficient Operation

Read This Information Before Using Your Radio.

The information provided in this document supersedes the general safety information in user guides published prior to December 1, 2002.

Transmit and Receive Procedure

Your two-way radio contains a transmitter and a receiver. To control your exposure and ensure compliance with the general population/uncontrolled environment exposure limits, always adhere to the following procedure:

  • Transmit no more than 50% of the time.
  • To receive calls, release the PTT button.
  • To transmit (talk), press the Push to Talk (PTT) button.

Transmitting 50% of the time, or less, is important because the radio generates measurable RF energy exposure only when transmitting (in terms of measuring standards compliance).

Exposure to Radio Frequency Energy

Your Motorola two-way radio complies with the following RF energy exposure standards and guidelines:

  • United States Federal communications Commission, Code of Federal Regulations; 47CFR part 2 sub-part J
  • American National Standards Institute (ANSI)/Institute of Electrical and Electronic Engineers (IEEE) C95. 1-1992
  • Institute of Electrical and Electronics Engineers (IEEE) C95.1-1999Edition
  • International Commission on Non-Ionizing Radiation Protection (ICNIRP) 1998
  • Ministry of Health (Canada) Safety Code 6. Limits of Human Exposure to Radiofrequency Electromagnetic Fields in the Frequency Range from 3 KHz to 300 GHz, 1999
  • Australian communications Authority Radio communications (Electromagnetic Radiation—Human Exposure) Standard, 2003
  • ANATAL ANNEX to Resolution No. 303 of July 2, 2002 "Regulation of limitation of exposure to electrical, magnetic and electromagnetic fields in the radio frequency range between 9 KHz and 300GHz" and "Attachment to resolution #303 from July 2, 2002"

To assure optimal radio performance and make sure human exposure to radio frequency electromagnetic energy is within the guidelines set forth in the above standards, always adhere to the following procedures.

Portable Radio Operation and EME Exposure

Antenna Care

Use only the supplied or an approved replacement antenna.
Unauthorized antennas, modifications, or attachments could damage the radio and may violate regulations.

Do NOT hold the antenna when the radio is "IN USE." Holding the antenna affects the effective range.

Body-Worn Operation

To maintain compliances with RF exposure guidelines, if you wear a radio on your body when transmitting, always place the radio in a Motorola-supplied or approved clip, holder, holster, case or body harness for this product. Use of Non-Motorola-approved accessories may exceed RF exposure guidelines.

If you do not use one of the Motorola-supplied or approved body-worn accessories and are not using the radio held in the normal use position, ensure the radio and its antenna are at least 1 inch (2.5 cm) from your body when transmitting.

Data Operation

If applicable, when using any data feature of the radio with or without an accessory cable, position the radio and its antenna at least one inch (2.5 cm) from the body.

Approved Accessories

For a list of approved Motorola accessories, visit out Web site at

Electromagnetic Interference/Compatibility

Note: Nearly every electronic device is susceptible to electromagnetic interference (EMI) if inadequately shielded, designed or otherwise configured for electromagnetic compatibility. 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.


To avoid electromagnetic interference and/or compatibility conflicts, turn off your radio in any facility where posted notices instruct you to do so. Hospitals or health care facilities may be using equipment that is sensitive to external RF energy.


When instructed to do so, turn off your radio when onboard on aircraft. Any use of a radio must be in accordance with applicable regulations per airline crew instructions.

Medical Devices – Pacemakers

The Advanced Medical Technology Association recommends that a minimum separation of 6 inches (15 cm) be maintained between a handheld wireless radio and a pacemaker. These recommendations are consistent with the independent research by and recommendations of the U.S. Food and Drug Administration.

People with pacemakers should:

  • ALWAYS keep the radio more than 6 inches (15 cm) from their pacemaker when the radio is turned ON.
  • Not carry the radio in the breast pocket.
  • Use the ear opposite the pacemaker to minimize the potential for interference.
  • Turn the radio OFF immediately if there is any reason to suspect that interference is taking place.

Medical Devices – Hearing Aids

Some digital wireless radios may interfere with some hearing aids. In the event of such interference, you may want to consult your hearing aid manufacturer to discuss alternatives.

Other Medical Devices

If you use any other personal medical device, consult the manufacturer of your device to determine if it is adequately shielded from RF energy. Your physician may be able to assist you in obtaining this information.

Safety and General Use While Driving

Check the laws and regulations regarding the use of radios in the area where you drive, and always obey them. If you do use your radio while driving, please:

  • Give full attention to driving and to the road.
  • Use hands-free operation, if available.
  • Pull off the road and park before making or answering a call if driving conditions so require.

Do not place a portable radio in the area over an air bag or in the air bag deployment area. Air bags inflate with great force. If a portable radio is placed in the air bag deployment area and the air bag inflates, the radio may be propelled with great force and cause serious injury to occupants of the vehicle.

Potentially Explosive Atmospheres

Turn off your radio prior to entering any area with a potentially explosive atmosphere. Only radio types that are especially qualified should be used in such areas as "Intrinsically Safe." Do not remove, install or charge batteries in such areas. Sparks in a potentially explosive atmosphere can cause an explosion or fire resulting in bodily injury or even death.

Note: The areas with potentially explosive atmospheres referred to above include fueling areas such as below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals or particles (such as grain, dust or metal powders) and any other area where you would normally be advised to turn off your vehicle engine. Areas with potentially explosive atmospheres are often—but not always—posted.

Blasting Caps and Areas

To avoid possible interference with blasting operations, turn off your radio when you are near electrical blasting caps, in a blasting area, or in areas posted "Turn off two-way radios." Obey all signs and instructions.

Operational Cautions


Do not use any portable radio that has a damaged antenna. If a damaged antenna comes into contact with your skin, a minor burn can result.


All batteries can cause property damage and/or bodily injury such as burns if a conductive material—like jewelry, keys or beaded chains— touch exposed terminals. The conductive material may complete an electrical circuit (short circuit) and become quite hot. Exercise care in handling any charged battery, particularly when placing it inside a pocket, purse or other container with metal objects.

Battery Charger Safety Instructions

Save these Instructions

  1. Do not expose the charger to rain or snow.
  2. Do not operate or disassemble the charger if it has received a sharp blow, or has been dropped or damaged in any way.
  3. Never alter the AC cord or plug provided with the unit. If the plug will not fit the outlet, have the proper outlet installed by a qualified electrician. An improper condition can result in a risk of electric shock.
  4. To reduce the risk of damage to the cord or plug, pull the plug rather than the cord when disconnecting the charger from the AC receptacle.
  5. To reduce the risk of electric shock, unplug the charger from the outlet before attempting any maintenance or cleaning.
  6. Use of an attachment not recommended or sold by Motorola may result in a risk of fire, electric shock or personal injury.
  7. Make sure the cord is located so it will not be stepped on, tripped over or subjected to damage or stress.
  8. An extension cord should not be used unless absolutely necessary. Use of an improper extension cord could result in a risk of a fire and/or electric shock. If an extension cord must be used, make sure that:
    • The pins on the plug of the extension cord are the same number, size and shape as those on the plug of the charger.
    • The extension cord is properly wired and in good electrical condition.
    • The cord size is 18 AWG for lengths up to 100 feet, and 16 AWG for lengths up to 150 feet.
  9. The supply cord of this charger cannot be replaced. If the cord is damaged, please refer to warranty section.

Control Buttons

Control Buttons

Getting Started

Installing the Batteries

Your radio uses three AAA Alkaline batteries and beeps when the batteries are low.

  1. Turn the radio off.
  2. Use a coin to wedge the batter cover open.
  3. Insert three AAA Alkaline batteries as shown on the inside of the battery compartment.
  4. Reposition the battery cover and press down to secure.

Attaching and Removing the belt clip

Hook the belt clip into the notch at the top of the radio and slide down until it clicks into place.

To Remove

Squeeze the release latch together and slide the clip up and away from the radio.

Turning Your Radio On and Off

  1. To turn on, press and hold until a channel number appears and the radio beeps.
  2. To turn off, press and hold until the display goes blank.

Setting the Volume

  1. Press the to increase or to decrease the volume. The volume level flashes and "V" displays.

Do not hold the radio close to your ear. If the volume is set to an uncomfortable level, it could hurt your ear.

Talking and Listening

To communicate, all radios in your group must be set to the same channel.

  1. To talk, press and hold .
  2. When you are finished talking, release .

For maximum clarity, hold the radio two to three inches away from your mouth and speak directly into the microphone. Do not cover the microphone while talking.

Note: This radio does not have Interference Eliminator Codes. To communicate with radios that use Interference Eliminator Codes, the Interference Eliminator Code must be set to 0.

Talk Range

Your radio is designed to maximize performance and improve transmission range. Do not use the radios closer than five feet apart.

Push to Talk Timeout Timer

To prevent accidental transmissions and save battery life, the radio emits a continuous warning tone and stops transmitting if you press PTT for 60 continuous seconds.

Initial Setup

Selecting a Channel

Your radio has 8 channels.

  1. With the radio on, press . The current channel flashes.
  2. Press or to select a channel.
  3. Press to confirm your selection or to continue set up.

Channels and Frequencies

Channels and Frequencies

Transmitting Call Tones

To transmit your call tone to other radios set to the same channel as your radio, press .

Note: To receive the call tone, radios that use Interference Eliminator Codes must be set to 0.

Special Features

Low Battery Alert

When the battery is empty, the radio chirps periodically after releasing .

Talk Confirmation Tone

Your radio transmits a unique tone when you finish transmitting. It is like saying "Roger" or "Over" to let others know you are finished talking.


Easily finds your group's channel by searching all channels for activity.

  1. Press twice until and flashing Y or – displays
  2. Press either
    until Y displays to turn scanning on
    until - displays to turn scanning on
  3. Press to confirm

When the radio detects channel activity, it stops scanning and you hear the transmission. To respond, press PTT within 5 seconds.

Documents / Resources


Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download Motorola TALKABOUT T4503 - Two-Way Radio Manual


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