[Asterisk-Users] Analog ports via USB

[Ed Greenberg]

Over on the voip-info.org tiki I found this statement:
> Mark (the man who made Asterisk PBX, www.asterisk.org) has an xbox that
> has 4 analog  ports via usb... aka the XBoxPBX

While I'm not interested in the xbox part of this, I wonder how one uses 
USB for analog connections?  Explanation? Pointer to an article? Other info?

Thanks,
</edg>
Ed Greenberg
San Jose, CA