System modem

USR-GPRS232-730: transparent serial to GSM/GPRS.

One RS-232 port and one RS-485 port (not at the same time). Operating temperature -25 to +85 °C. Quad-band GSM/GPRS 850/900/1800/1900 MHz.

USR-GPRS232-730 is a DTU on USR-GM3: bidirectional transparent serial to network with AT commands. 2G/3G/4G SIM cards are accepted, but the data path is GSM/GPRS, not 3G/4G.

Network	GSM / GPRS, 14.4-57.6 kbps
Bands	850 / 900 / 1800 / 1900 MHz
Protocols	TCP, UDP, DNS, HTTP
Ports	RS-232 DB9 and RS-485 A+/B-, not simultaneous
UART	2400-921600 bps
Power	DC 9-24 V, 12 V 1 A PSU in the kit
Size	80 × 84 × 25 mm
Antenna	50 Ω / SMA-K, included

Modem warranty: 2 years.