If are using a multiport serial board installed in a UNIX host, but wish to extend the device control range without dismantling the host, you can accomplish this with CN2510. Multiplex and De-multiplex solutions use CN2510's RTelnet and terminal modes, eliminating the need to modify existing software. CN2510 acts like a converter by extending the communication distance. CN2510s work in pairs over the network to overcome the short communication distance limitation imposed by serial connections.