Question about Motorola Talkabout T5720 (7 Channels) 2-Way Radio

1 Answer

T 5710 motorola talk about

Cannot transmit by push to talk

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  • Anonymous Nov 11, 2008

    t5720 won't send or receive - the other one works fine?

  • damnisux Nov 14, 2008

    motorola T5720

    both are on the same channel & sub-channel
    QT is turned off on both units

    i'm able to transmit and receive on one. the other can only receive. i push ptt and can hear that the transmit key has been pushed, but no voice. it's like the microphone is not working.

  • Anonymous Dec 03, 2008

    radio will receive but not transmit. Can hear that PTT button working but no voice transmitted

  • anant mehra Mar 26, 2009

    My Motorola Talk About T5720 have suddenly stopped transmitting and receiving calls. The channel,sub channel and QT settings are all the same.

  • eradiostore
    eradiostore May 11, 2010

    Are you able to receive (hear) transmissions on this unit?

    Have you checked your programming?

    Give a few more details of the issue, and we will try to assist.



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  • Motorola Master
  • 1,654 Answers

Short of having a radio tech look at the radio, I would suggest looking at the grill and mic hole to see if there is dirt or debris blocking the hole.

Posted on Nov 16, 2008


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2 Answers

I'm trying to find out how to use them i got two Motorola Talkabout T5100 from a yard sale i got both on same channel i push talk and nothing

As a basic test, if you press the transmit button on one, you should hear some sort of response from the other. I suspect your T5100s are defective.

May 26, 2017 | Motorola Radio Communications

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Cannot transmit, getting a constant tone while holding talk button and transmit light not coming on, any help?

Check the headset jack. There may be something inside causing a short. also, the CLS has an audio tone out button. Be certain you are not pressing it as you push the PTT button. The PTT is odd on this radio, it is the top BIG rubber button on top FRONT. Many customers get this confused with the tone transmit button.

Nov 13, 2015 | Motorola CLS1110 Professional 2-Way Radio...

1 Answer

Motorola radio seems to go to sleep when not used for a while. Battery still fine.

It is called battery save. You push the push to talk about 3-5 seconds and all the radios will "wake up". On most models, it can be turned off, but battery life (time before you need to recharge) is shortened.

Oct 21, 2015 | Motorola Radio Communications

2 Answers

Changed the battery in my 2-Way Radio CLS1110 and it will turn on but when you push talk it goes off

The battery is bad or not charged. Check your charger and charger/battery connection. Clean all contacts with a pencil eraser and try charging again. With a new battery it may take up to 3 charge cycles to fully charge your battery.

Best regards.

Jan 20, 2014 | Motorola CLS 1110 (1 Channel) 2-Way Radio

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Shuts off immediatley after pushing PTT button

sounds like your batteries are shot and not able to supply enough power for transmit

Jan 10, 2014 | Motorola Walkie Talkie 2-Way Radio

1 Answer

I have a Motorola MU21CV with a overly sensitive 'push-to-talk-switch'. Sometimes even though you press it and get the "red" transmit indication - it's not transmitting. Is there anyway to...

  • You can open the radio up and clean the switch up a bit but it sounds like the switch may be worn. It's a simple on off push switch. You may just go to your local hardware store or electronics store and get a switch and solder it in.

Regards, Tony

May 03, 2011 | Motorola MU21CV (1 Channel) 2-Way Radio

1 Answer

What is "vox"? why is it needed and what does it do? - thank you very much for your assistance - steve montgomery

In radio communications, "voice activation" or "VOX" has been used for decades where convenience or the need for hands-free operation rule out push to talk. The idea is simple: monitor the microphone input and transmit only when the user is actually talking.

Dec 26, 2008 | Motorola T5522 (7 Channels) 2-Way Radio

1 Answer

Model 5710

You need to check your programming of both frequency and interference eliminator. You may not have your radios set to match one another.

Jun 27, 2008 | Motorola Talkabout T5720 (7 Channels)...

4 Answers

Muting the sound


The sound produced by a Motorola radio when the mike is keyed refers to the "Transmitting Call Tone" which is another feature other than the "Interference Eliminator" or the "Roger Beep" feature.

On most Motorola GMRS/FRS TalkAbout radios, setting the "Call Tone" to 0 disables the feature. This is done with the radio ON by pressing on the "Menu" button 3 times which will result in the display showing the current Call Tone setting (flashing) and the letters CA; pressing on the <- or +> buttons will change selection (you will also hear the different Tones), select 0 (it may be up to 5 or 10 depending on the version). Press on the "Menu" or "PTT" button to set, save and exit.

Hope that this be of some help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

Nov 25, 2007 | Motorola TalkAbout T5530 2-Way Radio

1 Answer


If you are using vox (voice activated transmit) go into the menu and make sure you don't have the VOX setting too high. You should be able to put the headset on... hit the "push to talk" button on the radio and transmit you audio. Turn the other radio on and make sure the radio is "keying" (tx with no auio) then make sure there is audio. If you don't have audio but the radio is transmitting.. you might have the wrong type of plug on your headset for the audio..... there are 2 plugs... 1 for transmit audio....1 for recieve audio. It could be the wrong type of plug for the jack in the radio. Regardless.. the way the headset works is either you push the "push to talk button" onj the radio OR you use the VOX function... with the vox function you just have to talk into the mic to transmit. This is what your headset is designed for. You will have to go into the menu and set up the radio for VOX. If you still have problems follow my directions at the top of this page ( check mic jack and stuff) I think you just have to set the radio up for VOX operation and set the VOX setting. You should be able to push the push to talk button and talk through the mic on the headset. If you don't get any audio that way there is a problem and you should check the jack and plug on the headset.

Aug 25, 2007 | Motorola Talkabout T5720 (7 Channels)...

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