
RT4-5GL/4 Dual SIM GSM/GPRS/LTE Transmitter (Paradox, NX, DSC)
GSM/GPRS/LTE (4G) transmitter with two SIM cards (main and backup), 2×IP and a built-in Paradox/NX/DSC interface. Automatic switching.

GSM/GPRS/LTE (4G) transmitter with two SIM cards (main and backup), 2×IP and a built-in Paradox/NX/DSC interface. Automatic switching.
The RT4-5GL/4 is a CORTEX GSM/GPRS/LTE transmitter for 4G and 2G networks with two SIM cards: if the main SIM fails, it switches to the backup SIM and periodically checks the main one to switch back. It likewise works with two IP addresses — main (a domain name can be used) and backup.
The transmitter has 9 operating modes: Serial BUS, CADDX NX, Esprit, Magellan, Digiplex, DSC Key-BUS panels with 1–2 and with more partitions, the ABAS II bus, or work as a standalone alarm panel. 5 inputs, a 220 V mains monitoring input, 2 PGM outputs (up to 1 A), a 254-event log and SMS to up to 4 users. Programmed over USB or remotely over GPRS, 10–30 V supply, 68×125×19 mm.
| Standard | GSM/GPRS/LTE |
|---|---|
| Network | 4G/2G |
| SIM | 2× Micro SIM (main and backup), 3 / 1.8 V |
| IP addresses | 2 (main, backup), domain name |
| SMS | up to 4 users |
| Operating modes | 9 (Serial BUS, CADDX NX, alarm panel, Esprit, Magellan, DSC Key-BUS 1–2 partitions, DSC Key-BUS 3+ partitions, Digiplex, ABAS II) |
| Inputs | 5 + 220 V mains monitoring input |
| Outputs | 2 (PGM), up to 1 A, 30 V |
| Event log | 254 events |
| Programming | USB, remotely over GPRS (incl. firmware) |
| Power supply | 10–30 V |
| Current (12 V) | 15 mA standby, 150 mA in GPRS mode |
| Size | 68×125×19 mm |
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