[ChalkLine]

So, you've got yourself a settlement but the nasty OPFOR are monitoring your hand-helds? No worries, here's something to string between your bunkers.

Field Telephones.

Battery-powered hand sets appeared to all be able to run of external power, usually in the 3 volt range. Most phones seem to have a hand crank to enable ringing at the other end if not used with a switchboard. Nearly all these phones, you can probably assume it is all of them, are sound-powered. The only reason you need to use power is to ring the buzzer. If you don't have a dedicated switchboard, and let's be honest you won't, a simple task will be to rig up a series of switches that exclude or include lines for multiple use. In this case it's possible to have "party lines" of multiple phones.

German

FF OB/ZB (Introduced late 1950s)
Requires 2x D-Batteries
5.0kg

SFT800 (Introduced early 1980s)
3.6kg

USA

TA-1
Sound-powered
1.2kg

TA-43
Requires 2x D-Batteries
5.0kg

TA-312 (Introduced late 1960s)
Requires 2x D-Batteries
4.35 Kg

USSR

TA-57 (Introduced 1957)
Requires 1x 1.5v Battery
2.5kg