Description
Clear-Com EF-701M 4-Wire Interface with Call Signal
The Clear-Com EF-701M 4-Wire Interface with Call Signal, Matrix-to-Partyline or TW Partyline 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.
Features
- High-quality partyline to 4-wire audio conversion interface
- Maintains hybrid null with multiple units on a channel
- Converts call signals to RS-422 data with a selectable baud rate
- Connects intercom with call signal over fiber
- Clear-Com and RTS compatible
- Built-in test tone and jack for nulling
- Multi-mode data status LED
- Powered by the intercom line
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 | |
| Signalling Tone | |
| Send frequency: 20kHz ±1KHz | |
| Receive frequency: 20kHz ±500Hz | |
| Send level: >=-6dBu | |
| Receive level: <=-20dBu | |
| General Characteristics of EF-701M | |
| 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 (.794 kgs) |
| Accessories | Wiring diagram, adhesive backed TS-1 testing earphone |
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8% Goods Service Tax (GST) will be imposed over the total invoice value if purchased locally in Singapore. However if you are a tourist visiting Singapore, this GST amount can be refunded at the Changi International Airport Departure Hall GST Refund Centre before departure with goods within 60 days from the date of purchase. Please note that only Tourists who have met the Tourist Refund Scheme’s conditions and eligibility criteria can claim for the GST refund. Visit the following link for GST Guide for Visitors on Tourist Refund Scheme. https://www.iras.gov.sg/taxes/goods-services-tax-(gst)/consumers/tourist-refund-scheme
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