

The EnGenius DuraFon 4X is the longest range cordless phone on the market. The DuraFon 4X provides 2-way radio or brodcast between handsets, independent of the base, and its 4-lines allows you to expand up to 36 handsets.
The DuraFon4X is the newest generation of Industrial Cordless Phone Systems EnGenius has invented. The DuraFon4X has the longest range avaliable in a phone system. Reach up to 250,000 square feet in manufacturing plants, warehouses, retail stores, and healthcare facility like environments; 12 floors in-building penetration; and 3,000 acres on farms, ranchers, and school campuses. The two-way-radio is independent of the base and allows intercom and brodcast signals. You can even program your handset by individual base unit to receive all calls or just transfer. The system can also expand along with your growing business. With its 4-lines you can add up to 36 handsets. The DuraFon4X carries more features like the Caller ID with call waiting, digital spread spectrum with frequency hopping, multi-line, 30-number speed dial and much more.
Features:
- Multiple handsets (up to 36 per base unit)
- Multiple lines (4-ports / lines per base unit)
- Works behind any analog port of a PBX, phone system or analog phone line
- Durable
- Reliable
- Ease to use
- 6 hours talk time, 50 hours stand-by time
- Optional external antenna for indoor use in warehouses and manufacturing plant or outdoor use on farms and car lots

Technical Specifications
Electrical Specs | Base Unit | Handset |
---|---|---|
Frequency | 902 - 928 MHz | 902 - 928 MHz |
RF Power | Peak: 708 mW Average: 304 mW | Peak: 708 mW Average: 76 mW |
Channel Spacing | 200 kHz | 200 kHz |
Number of Channels | 128 | 128 |
Modulation | MSK | MSK |
Multiple Access | Freq. Hopping TDMA | Freq. Hopping TDMA |
Freq. Hopping Rate | 100 per second | 100 per second |
TDMA Frame Length | 10 ms | 10 ms |
Number of Slots / Frames | 8 | 4 |
Number of Users / Carrier | 4 | 4 |
Receiver Sensitivity | < -108 dBm (@ BER 10-2) | < -108 dBm (@ BER 10-2) |
Antenna Connector | Reverse TNC | Non-standard |
Antenna Gain | 2 dBi Standard Rubber Duc Antenna 3 dBi Enternal Antenna Option | 2 dBi Tall Handset Antenna .5 dBi Low Profile Handset Antenna |
TX Power Control Range | N/A | 100- 708 mW |
Telephone Interface | RJ11 x 4 | N/A |
Speech Coding | 8 kbps G.729A | 8 kbps G.729A |
Channel Coding | 8 kbps Convolutional + CRC | 8 kbps Convolutional + CRC |
Transmission Data Rate | 170.678 kbps | 176.678 kbps |
User Data Rate | 128 kbps duplex | 128 kbps duplex |
Duplex | Time Division Duplex (TDD) | Time Division Duplex (TDD) |
Voice Quality | TIA / EIA -470B | TIA / EIA -470B |
Number of System ID | 65,536 | 65,536 |
Ring Signal | 20-50 Hz, 12-90 Vrms | N/A |
Auto-Attendant Coding | 8 kbps G.729 | 8 kbps G.729 |
Flash Time | 100 - 900 ms Programmable | N/A |
Power Source | 120V/12V AC/ DC Adapter | 3.6V, 1700 mAh Li-Ion Battery |
Charger Current | N/A | 500 mA |
Charge Time | N/A | 4 Hours |
RegulationCompliance | FCC Part 15, Part 68 CAN/DOC RSS210, CS03 | FCC Part 15, Part 68 CAN/DOC RSS210, CS03 Hearing Aid Compatible |
Operating Temperature | -10 - 60 oC (14 - 140 o F) | -10 - 60 oC (14 - 140 o F) |
Storage Temperature | -10 - 70 oC (14 - 158 o F) | -10 - 70 oC (14 - 158 o F) |
Humidity | 20 - 75% | 20 - 75% |
Dimension without Antenna | 280 x 215 - 53 mm 8.5"x 11.0"x 2.1" | 161 x 58 - 31 mm 6.3"x 2.3"x 1.2" |
Weight | 32 Ounces (907 g) | 6.2 Ounces (175 g) |