1. Providing 900 and 1800 GSM connectivity
2. Simple to install/easy to maintain
3. Allow PIN code entering and reciprocal phone-card lock
4. Provide optimized circuit directly connecting the exchange device
5. For extensions
6. LCD with back screen display billing, signal, caller id.

7. Polarity reversal signal for metering
8. 3.5dBi gain antenna
9. Compatible to PABX or VOIP gateways or a telephone
10. Suitable for call termination of ISP
11. Incoming call reminder, time display