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FlyingVoice FWR7302 4G SIM Card VoIP Wireless Router With VoIP functions SFP/USB/FXS Ports Include External Antennas WAN/LAN RJ4 - AliExpress
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TP-LINK TD-VG3631 Wireless N300 VOIP ADSL2+ Modem Router, 2.4Ghz , 2 FXS Ports, 1 FXO Port, 2 USB, 5dBi detachable antennas - Walmart.com
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