A device that adds 3G or 4G (LTE) cellular connectivity to laptops, desktop computers and various tablets. Typically available as an external USB module, for desktop computers, the modem may also ...

The classic serial null-modem cable was, among other things, used to connect two computers together for communications and file transfer. Largely eliminated in daily use by the advent of home ...

Remote diagnostics. RS232. Flash upgradeable chips. USB. Built-in digi-modem. Expandable to 264 zones using remove keypads. Up to 98 prox tags. Simultaneous multi-tasking users.