Amazon.com: D-Link 4G LTE (Cat 4) to Gigabit Ethernet Modem/Bridge, Best for M2M Applications, Supports OpenVPN, Optional Enterprise Service Platform, Works on Verizon or AT&T (DWM-311-B1) : Electronics
M2M Industrial Cellular 3G 4G LTE Modem Router with Ethernet Vpn Wifi Sim Card Slot Serial rs232 rs485 Port _ - AliExpress Mobile
Amazon.com: Industrial 4G LTE WiFi Router for AT&T and T-Mobile SIM Card, Not for Verizon, Cellular VPN Routers Internet Backup, M2M Gateway RS232 Modem, for Vehicle Fleet RV Camera Security System Automation :
Amazon.com: 【Upgrade】LINOVISION Industrial Unlocked 4G LTE Router for AT&T and T-Mobile, Support WiFi, Dual SIM Cards, RS485 and DI/DO, Secure VPN Access, Cloud Management, Cellular Router for M2M/IOT Application : Electronics