Clear Com Converting Interface

4-Wire Interface with Call Signal, Matrix-to-Party-line.

The EF-701M interface converts a single channel of standard or TW party-line intercom to four-wire audio, while also converting call signals to RS-422 data (and back). The resulting four-wire audio plus RS-422 data can then be sent to a Clear-Com Matrix port, fiber-optic converter (modem) or connected to another EF-701M over twisted-pair cable such as CAT-5E.

Technical Specifications:

Clear-Com Format:

• 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 – Matrix: 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
• Rear Panel Connectors and Controls:
  • Party-line: (1) XLR3F
  • RTS: (1) DB-15F
  • Matrix: (1) RJ-45, (2) Mode Switches
• Front Panel Connectors and Controls:
  • TS1 Earphone: (1) 3.5mm Jack Socket
  • Level Adjust: (2) Rotary Control
  • Null Adjust: (3) Rotary Control
  • Power Indicator: (1) Green LED
  • Data Indicator: (1) Amber LED
• Dimensions: 1.62 in. H x 5.94 in. W x 4.80 in D (41 mm x 151 mm x 122 mm)
• Weight: 1.75 lbs (0.794 kgs)
• Accessories: Wiring diagram, adhesive backed TS-1 testing earphone

• Condition: New
• Coupons: Free ground shipping item *