Grandstream HT801 FXS 1-Port Analog Telephone Adapter ATA VoIP | eBay
Grandstream HT801 Analog Telephone Adapter: 1 FXS Port, T.38 Support
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Obihai Technology OBi200 VoIP Phone Adapter with T.38 Fax OBI200
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Yeastar TA100 Analog Telephone Adapter (ATA) 1 FXS Port FAX T.38
Flyingvoice FTA5120 VoIP Adapter (2 FXO ports, G.729 Codec, T.30 & T.
T38 Fax Over Internet Protocol | T 38 Protocol
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Fax Relay - T.38 Fax over IP (FoIP) | Adaptive Digital
Amazon.com: 2-Port VoIP SIP Phone Adapter - GT202 Wireless Router, Supports WiFi Asterisk ATA VOS FXS Fax. Suitable for Home or Business (Black) : Office Products