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industrial 3g modem4G/3G/2G
Ethernet
VPN (PPTP/L2TP, IPSec, GRE, OpenVPN)
RS232/RS485 optional
GPS optional
Cloud management optional

industrial 3g modem

M3 series industrial cellular modem is an industrial 3g modem with rs232 or USB interface. It offers state-of-the-art 2G (GPRS/EDGE)/3G (HSPA/EV-DO)/4G (LTE) connectivity for machine to machine (M2M) or the internet of things (IOT) applications.

It can be used in finance, postal, smart power grids, smart transportation, environment monitor, fire protection monitor, security, water conservancy, public safety, advertising release, industrial control,, earth quake monitor, meteorological watch, instrument monitor.etc

Industrial Class Design

High-powered Industrial cellular module provide the strong anti-jamming ability
PCB comply to 3H and 3W
Wide range Voltage power supply

Flexibility and Convenience

Support RS-232 or USB 2.0 interface that can plug into industrial PC or end RS232 device
Plug & Play solution for quick and easy integration , flexible and reliable
Control the power on/off by interface control line, easy for user device to control the operation of the modem

Stability and Reliability

The modem support serial I/O hardware reset to ensure always online
Link detection and watch-dog design, support WDT to ensure always online transmission
UIM/SIM SIM card ESD Protection: 1.8V/3V Standard
RS232 Interface ESD protection
Robust Metal Case and anti-lightning protection
Provide IP30 protection

https://www.homtecsm2m.com/product/M3-series-Industrial-Cellular-Modem-33.html