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1  Follow up to questions 55 and 56. Therefore, we have 28 out of 30 radios that are unable to send an alarm even when set as answered in question 55. Only two were affected out of 30 by changing the settings as described. And, we noted those two will send an alarm whether set as answered in 55 or not. ???
Hello Michael, Please set 30 radios in H777 software as below: “side key” to choose “alarm” “incept alarm” to choose “on” After done, write to radio, attached a pic for you reference Confirm all radio can communicate with each other, then press side key “1” to try it again Best regards
2   i cannot get any transmission in or out when i turn the radio on it informs me of the channel then the red light comes on
Hello Kevin, If two radios can communicate with each other, keep the frequency and CTCSS same, so pls check your frequency and CTCC if it's same Brgds
3  BUOGIORNO DOVE POSSO SCARICARE IL SOFTWARE PER LA PROGRAMMAZIONE DEL H777 GRAZIE
4  I have an RT5 and found out, that the mic does not work. Got it as a two pack a month or so ago but had never tried this radio. Is there a Mute setting that I don't know off or any other troubleshooting tips? Cheers,
Better find your seller to ask for your warranty in this situation .
5  How do I program my new H-777 walkie talkie and is it necessary to do so? The squelch volume is too loud when interference is taking place. How do I adjust the volume?
You need to connect your radio to PC by cable , How to program it on software please read the guide here : http://blog.retevis.com/retevis-radio-frequency-programming/ . Then when you open the software , you will see just like the picture below -- There you could find the squelch levels , that's the function you need to set .And please note --
1. The higher the number is , and the stronger the ability of noise suppression is . But meanwhile it has less probability to receive the weak signal.
2. Conversely, The smaller the number is , the weaker the ability of noise suppression is , But meanwhile it is more easily to receive the weak signal.
3. A "0" level indicates that there is no squelch suppression function, which is the lowest level.
6  Hi, I just bought 2 radios RT25. I already have 10 units of RT21 and 2 units of RT22. RT21 and RT22 comunicate together but RT25 don't. How can I make them communicate ? Thank you.
Just make them at same frequencies and CTCSS/DCS .