The control seems to sort of work even now, BUT you first need to use the push to talk button and have the short range radio already selected (which it is by default) and then change between short and long range radio, but that cannot be the intended function.

I did notice another anomaly in communication options, and that is that there is no similar toggle for long range radio that there is for local talk and short range radio. Maybe that is intentional so the long range platoon radio would not be flooded accidentally. It can be done, but not with just one button/combo.

And as for what the original question's selection is for, I answered this a while back in steam discussion, but the discussion is no longer visible so here are the main points

Question. Could someone please kindly explain the difference between:

1. Talk (hold)
2. Talk over radio (hold)
3. Push-to-talk
4. Toggle voice

under the "Common" controls group.

I understand that "Talk (hold)" refers to communicating to a nearby team member (i.e. local voice), whilst "Talk over radio (hold) refers to communicating via radio (i.e. channel chat). How how do these differ from 3 & 4.

Answer. 1 and 2 both select their assigned channel and transmit voice as long as you hold the button down. 3 transmits (talks) on the channel you have previously selected (in this sense direct talk is a channel) as long as you hold the button down ( there is two more choices right under it in the settings that make the channel selection between direct talk/radio talk and short range radio/long range radio but pressing those does not send transmissions) and 4 means that first push opens the channel, second push closes the channel.

So it is just a different style of control, either you use button that both selects a channel and transmits on that channel or just one button that transmits and channel selection is done separately. And also between holding button down to transmit and one press to start transmitting, second press to stop transmitting.

And as you can see the defaults are set in a way that half are set for keyboard and half for controller. You can set them differently too, you can have both keyboard and controller command for talk over radio (hold) for example.

the intent here is for squad leaders to have a short range radio to communicate with fire teams, and a long-range radio to communicate with platoon-level leaders. the ability to switch between two radios is obviously of little use in Conflict, but is very important for organized milsim PVE units. in ArmA 3, a different keybind is used to talk on each radio, which is simple and intuitive. Reforger has to work with console controllers, so unfortunately we seem to be stuck with a convoluted and clunky workaround involving multiple key presses and keybinds.