This is a fast and simple multiplexer. These multiplexers work with a wide variety of equipment since they are completely transparent to character formats (5,6,7,8 data bits, any number of startstop bits). They are more convenient and economical than multiple line drivers where connectivity to a group of users is desired. A special Cable "OK" indicator alerts you in cases of broken cable or incorrect connections. PRODUCT FEATURES : Fast response time Saving cabling 9600bps speed for each data channel Range upto 1 kilometre