Telebyte offers a large family of Short Haul Modems/Line Drivers using protocols that include ASYNC, SYNC, HDSL and T1/E1. Choose from wire or fiber, full duplex and handshake, and an assortment of speeds. Our versatile product line offers LCD displays, built-in surge protection, and DTE/DCE switches. Features include DIN Rail mounting, optical isolation, external powering, power stealing, as well as RS-232 and RS 422 interfaces.