Norwood, Mass —We all know the USB port: it's fast, small, well supported, inexpensive, and ubiquitous (have you even seen a serial port lately on a PC?). But it has one glaring problem, which becomes ...

Noisy phone lines, lighting on phone line issues, or to maintain the integrity of a fiber optic designed security systems that need remote monitoring. This unit is not made for DSL lines, only regular ...