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Charge or put in batteries.
Turn both radios on.
Turn the volume up.
Tune both radios to the same channel. Pick a channel that is quiet. Quiet means very little chatter and very little white noise. You can make a channel more quiet by increasing squelch but increasing squelch decreases range.
Both radios are now listening.
When you want to talk, press the talk button and say what you want to say.
Remember you are just talking to anyone listening on that channel, so be nice.
You do not mention the type of Motorola radio so these comments will be generic in nature:
You need to have your radio turned off when plugging in a headset or audio device. Then press the PTT once after turning on the radio. This should aclimate the headset to the radio. If you were to plug in the headset with the radio turned on, it will appear to be in VOX. But will be stuck with the Transmit side open.
Your H and L PTTs are likely a high power 1-2 watts and a low power one half watt setting. Without the radio model and user guide, we cannot research this further.
14. Push to talk
Push to talk (PTT) is a two-way radio service available over a GPRS cellular network (network service).
You can use PTT to have a conversation with one person or with a group of people (channel) having compatible phones. While you are connected to the PTT service, you can use the other functions of the phone.
To check availability, costs, additional features and to subscribe to the service, contact your service provider. Roaming services may be more limited than for normal calls. This feature may not be available, depending on your phone.
For more information about signing up for the PTT services and the usage, contact your service provider.
To connect to the PTT service, select Menu > Push to talk > Switch PTT on.
LOOKS LIKE YOU HAVE TO SUBSCRIBE TO USE IT! hope this helps.
In order to get the most out of your new radio, read this reference guide completely before attempting to operate the radio.
Turning the Radio On and Adjusting the Volume
1) Press and hold the key to turn the radio ON.
2) To change the volume level press the volume/monitor up or down key to increase or decrease the volume level.
3) Press and hold the key to turn the radio OFF.
Adjusting the Sound (Key Beeps)
Your radio emits a beep each time one of the keys (except for the PTT button and call key) is pressed. The sound of the Key Beep will increase or decrease depending on the volume level setting.
To turn OFF this beep:
Press and hold the call key while turning ON the radio.
To turn ON this beep:
Turn the radio OFF and ON again.
Choosing a Channel
Your GMR325-2 radio has 22 channels you can use to talk to others. In order to speak to someone, each of you must be set to the same channel.
To choose a channel:
Press the channel/scan up or down key to increase or decrease the channel number displayed.
Channel Scan Feature
Your GMR325-2 radio has a channel Scan feature that allows you to easily Scan all 22 channels. When an active channel is detected, the unit will pause on that channel until the channel is clear. Then after a 2 second delay, the unit will continue scanning.
Pressing PTT button while the Scan is paused on a channel will allow you to transmit on that channel.
To turn ON channel scanning:
Press and hold either the channel/scan up or down key. The channel number on the display will rapidly cycle through the channels.
To turn OFF channel scanning:
Press either the channel/scan up or down key.
Talking on Your Radio
To talk to others using the radio: 1) Press and hold the PTT button and speak in a clear, normal voice about 2-3 inches away from the microphone.
While you are transmitting the tx icon is displayed. To avoid cutting off the first part of your transmission, pause slightly after pressing the PTT button before you start talking.
2) When you are finished speaking, release the PTT button.You can now receive incoming calls. While receiving, the rx icon is displayed.
Transmitting a Call Alert Tone
Your GMR325-2 radio is equipped with a call tone that will be transmitted when the call key is pressed.
To transmit the call alert tone, press the call key.
The tone will automatically be transmitted for a fixed length of time.
Auto Squelch Feature
The GMR325-2 is equipped with an automatic squelch system which shuts off weak transmissions and unwanted noise due to terrain conditions or if you have reached your range limit.
Monitor Mode Feature
Your GMR325-2 radio allows you to listen for weak signals on the current channel at the press of a key.
To turn ON monitor mode:
Press and hold the volume/monitor up or down key. The rx icon will blink.
To turn OFF monitor mode:
Press the volume/monitor up or down key. The rx icon will stop blinking.
Automatic Power Save Feature
Your GMR325-2 has a unique circuit designed to dramatically extend the life of the batteries. If there is neither transmission nor an incoming call within 2 seconds, your radio switches to the Power Save mode. The radio is still able to receive transmissions in this mode.
Press and hold the call key until the "L" appears. After 1 second, the LCD will return to the channel display. To exit Keylock on mode, press and hold call again.
Note: While in keylock on mode, it will still receive transmissions.
Roger Beep is a BEEP that is sent to notify the end of transmission. Roger Beep can be heard through the speaker when Key Beep is on. Roger Beep is transmitted even if key beep is turned off. However Roger Beep will not be heard from the speaker.
To turn OFF Roger Beep: Press and hold the channel/scan up Key while turning on the radio.
Hold the push to talk(PTT) button while turning the unit on, it will talk to you. press PTT to change channel, push monitor to switch to codes, press PTT to change codes. When you have the correct settings press monitor and it will confirm settings.
The flashing light can be an indication there is activity on the frequency the radio is set to. Pressing the monitor button should give you the white noise (static) sound, so this function is working correctly. This also tells us your speaker is working fine, as well as your volume. The typical reason you cannot go into programming mode (when you hold the PTT in while turning on the radio and hear the female voice announce your frequency) is a bad or moved internal PTT switch. This typically happens over time as a user presses ever harder on the PTT to communicate. However, this does not explain why you are not receiving. This could simply be a result of an incorrect PL code in conjunction with the bad PTT. If you have a frame removal tool, you can extract the component board and physically look at the internal PTT. You can then hold in the very small button and program the radio to the frequency/PL you desire. If you are needing the radio repaired, you can get this style unit repaired for around $69 flat rate
If your radios are set identical to one another, you simple need to press the push-to-talk button (PTT) and hold it in while talking. Let go when you are not talking, in order for the other person to be able to press their PTT and talk back to you. The monitor button is only for checking to see if other users are talking on your same frequency, and if so, you are to be polite and not talk over the top of them. (So the rules say.)