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| Model | 2G Frequency (MHz) |
3G Frequency (MHz) | 4G Frequency (Bands) | Power Backup | GPS | GPS UDR | SMS Function | RMV Function | RTU Function | Interface | I/O |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GTP-500M | GSM/GPRS: 850/900/1800/ 1900 MHz |
WCDMA: 850/900/1900/ 2100 MHz |
- | 1250mAh 3.7V Battery |
Yes | - | SMS IO | Yes | Yes | 1 x RS-232 1x RS-485 |
Optional |
| GTP-541M | GSM/GPRS: 900/1800 MHz |
WCDMA: 900/2100 MHz |
FDD LTE : B1/B3/B8 TDD LTE : B38/B39/B40/B41 |
- | Yes | - | SMS IO/SMS Modbus/ SMS TXT |
Yes | Yes | 1x RS-232 /RS-485 |
5 x DI 2 x DO 4 x AI |
| GTP-541M-UDR | Yes | Yes | |||||||||