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FXS or FXO Now I'm really confused - New Tech Industries, Inc
What are FXS and FXO ports? What are they used for? - VoIP Insider
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OpenVox A800E11 8 Port Analog PCI-E card + 1 FXS + 1 FXO modules, 166
Grandstream: GXW4200 FXS Gateway – T38Fax Incorporated
ATA188-I1 Cisco 188 2-Port Analog Telephone Adaptor 2 x FXS , 1 x 10/100Base-
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What are FXS and FXO ports? What are they used for? - VoIP Insider
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Analog GSM Gateway FXS 1 Port GSM FWT Etross-8848 850/900/1800/1900MHz - China GSM Gateway and Wireless GSM Gateway
