Clear-Com EF-701M, 4-wire interface with call signal

Clear-Com EF-701M, 4-wire interface with call signal

Clear-Com EF-701M has a convert 2-wire to 4-wire with built-in hybrid null and wide-range level controls. Besides being used as a visual indicator the Clear-Com EF-701M, Call Signaling can be used to trigger relays or functions in other intercom equipment. Another thing in EF-701M Simplify Setup between Partyline and Matrix, for systems where only one or two partyline channels are needed, a rear dip switch selects the connection for the 4-wire audio and data as the RJ-45 jack instead of the DB-15.

4-wire interface with call signal: 
Encore four-wire interface with call signal. Interfaces matrix to a single channel of standard or TW party-line.

Clear-Com EF-701M Product Features

Line Characteristics
Max Level Before Clipping : >=20dBu

Impedance: >=10KΩ

Signaling
Receive: <=4 VDC

Send: >=11VDC

RTS Format

Line Characteristics
Max Level Before Clipping : >=20dBu

Impedance: >=10KΩ

Signaling Tone
Send frequency: 20kHz ±1KHz

Receive frequency: 20kHz ±500Hz

Send level: >=-6dBu

Receive level: <=-20dBu

General Characteristics
Frequency Response:

Party Line – Party Line: 200-10KHz ± 3dB

Matrix – Party Line: 200-10KHz ± 3dB

Distortion
Party Line – Matrix: <=0.5%

Matrix – Party Line: <=0.5%

Noise
Party Line – Matrix: <=-50dBu

Matrix – Party Line: <=-70dBu

Max Gain
Party Line – Matrix (CC setting): 20dB ± 3dB

Party Line – Matrix (RTS setting): 16dB ± 3dB

Matrix – Party Line (CC setting): -5dB ± 3dB

Matrix – Party Line (RTS setting): -1dB ± 3dB

Min Gain
Party Line – Matrix (CC setting): -7dB ± 3dB

Party Line – Matrix (RTS setting): -12dB ± 3dB

Matrix – Party Line (CC setting): -33dB ± 3dB

Matrix – Party Line (RTS setting): -29dB ± 3dB

Power Requirements
Input Voltage Range: 20-30VDC

Quiescent Current: <=70mA

Max Current: <=80mA

Dimensions
1.62 x 5.94 x 4.8 in (HxWxD)

(41 x 151 x 122 mm)

Weight
1.75 lbs (.79 kg)