Teltonika RUT955 4G LTE Dual SIM router with WiFi, 4x Ethernet ports, I/O, RS232, RS485, GNSS - Autech Control Group
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Iot Gateway 3G 4G LTE DTU 150Mbps Industrial Router WiFi with RS232 485 Gpios Port for Metering System - China 4G Industrial Wireless Router and 4G LTE Router price | Made-in-China.com
Amazon.com: VONETS 2023 Release VAP11S-232 Industrial High Power 2.4GHz WiFi Bridge/Repeater/Mini Router/ RJ45 to RS232 Serial Server with 2 RJ45 Ports/Antennas USB/DC Powered for DVR Monitor Network Devices : Electronics