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.

	Field Telephone Interface Coupler type: 1:1 transformer Input/output impedance: 600 ohm Ring input voltage: 90Vpp Ring output voltage: 50 +- 5Vrms (Ref.) Output signal voltage: 0.4 Vrms, Max Lighting protection: 100 V min. Distortion: < 5% Size: 135mm x 135.6mm x 63mm (LxWxH) Weight: 0.89kg
	Alarm/Audio interface (Tail Light) Input channel: 3 channels Input impedance: 150 ohm Input signal strength: 25/45/450 mVrms Size: 95mm x 160mm x 38mm (LxWxH) Weight: 0.47kg