The Model 2089F-RJ45 is Patton's first high speed RS-232 on a DB-9 to RS-485 EIA-574 interface converter with handshaking. The 2089F-RJ45 features a DB9 female to RJ45 connector. The Supporting async data rates to 115.2 kbps over one or two unconditioned twisted pair, the Model 2089F-RJ11 passes one control signal in each direction. The Model 2089 can handle up to 50 terminal drops in a multipoint polling environment; yet it is small enough to plug directly into a DB-9 serial port...and requires no AC power or batteries for operation. The Model 2089 has five configuration parameters, allowing the unit to be "fine tuned" to a variety of point-to-point or multipoint applications. Silicon Avalanche Diode surge protection is standard as well. Amazing!