What is a Microphone and why do I need?

A telephone center is integrated to the panel. (not simulated)
You can select who to call (2, AV, RV, STAB, PU-I, PU-II, PU-III, 3), make a call (with the button), and switch on/off your microphone.
You can have a phone conference, by selecting more than one.




"RAB PO ADA" is active or not?

active

What is the meaning of these switches and are active in the Dvina!

RPK (ANT/EKV)