Clear Com Converting Interface
Details
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