(1) 1040mm Serial 10pin header to DB9 Cable, (1) 520mm Serial 10pin header to DB9 Cable, (1) 100mm DCD RJ45 to DB9 Cable, (1) 100mm DSR RJ45 to DB9 Cable.
Allows two RJ45 ports to share one Cat5 shielded network cable - Allows you to only lay one cable run for two connections - Used in pairs (one modular distributor on each end of the network cable) ...