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Zlan8304N2 7 serial server 2 ports 4 RJ45 RS232 RS485 RS422 to GSM 3G 4G Wifi Ethernet Mutual Convert Router Switch|Building Automation| - AliExpress
Portable Mini 2 Port Rj45 Rj-45 Network Switch Ethernet Network Box Switcher Dual 2 Way Port Manual Sharing Switch Adapter Hub - Networking Tools - AliExpress
Linksys SE3005 5-Port Gigabit Ethernet Switch | Linksys: US
TP-LINK 8-Port 10/100/1000Mbps Desktop Switch (LS108G) - The source for WiFi products at best prices in Europe - wifi-stock.com