Datavideo CB-55 RJ-45 to RS-232 Converter for PTC-120

The Datavideo CB-55 is a RJ-45 to RS-232 Converter for PTC-120. RS-232 Cascade Solution for PTC-120 and RMC-190. Cascade up to 7 PTC-120 by CAT. 5 or CAT. 6 Ethernet cables. Connect from Cat. 5 to 8 pin mini Din RS-232.