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WDIB4 Capacity
| Items | WDIB4 |
| Maximum Cell Number (Number of Base Stations) | 4 |
| Voice channels / Cell | 4/6 |
| Maximum registered terminals | 16 |
| Max. Simultaneous Wireless calls | 16* |
Wireless Terminal Specifications
| Item | Specification |
| Max. Transmission Power | 250mW |
| Modulation Method | GFSK |
| Frequency Band | 1,880MHz ~ 1,900MHz |
Base station Specifications
| Item | Specification |
| Power feeding | +30V DC |
| Transmission Max Power | 250mW |
| Access Method/Duplex | TDMA/TDD |
| Frequency Band | 1,880 ~ 1,900MHz |
| Channel Spacing | 1.728MHz |
| Modulation | GFSK |
| Data rate | 1.152Mbps |
| Max. Base Station distance from the WDIB4 | 600m (twisted 2-pair cable) |