AT DVIS - EFT – Extended Field Telephone

The Extended Field Telephone (EFT) box allows the crew inside the vehicle to talk to people outside. When permitted by the Commander (via ACU), it also allows the people outside to use radios that are connected to the intercom system. A handset H-189 connects directly to the EFT. In place of the handset, an external field telephone or a field PBX may be connected.