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Hello, and welcome to Open USB FXS!
What is Open USB FXS?
Open USB FXS is what its name says: an open (open-hardware, open-firmware, open-software, open-documentation) FXS design that connects to your computer over USB. FXS stands for “Foreign eXchange Subscriber” and is the side of a telephone subscriber line to which a phone set, a fax or an analog PBX is connected. In other words, Open USB FXS lets you connect an analog phone or other such device to your computer over USB.
Open USB FXS works under Asterisk through a Dahdi-compatible device driver. Thus, in order to use it, you must run Linux on your computer and have Asterisk installed. Open USB FXS has been tested with Asterisk versions 1.4.x and 1.6.x and with Dahdi versions 2.2.x, 2.3.x and 2.4.x. Linux kernels tested range from 2.6.26 to 2.6.36 (on kernels older or newer than this, the driver may not compile).