Service manual

100
Installation & Service Manual
Appendix B - Hardware Specifications and Cabling
Cyclades-TS
cable would connect the TxD with RxD, DTR with DCD/DSR, and RTS with CTS across both sides. A “simplified”
crossover cable would cross TxD and RxD and locally short-circuit DTR with DCD/DSR and RTS with CTS.
Most of the diagrams in this document show the “complete” version of the crossover cables, with support for
modem control signals and hardware flow control. Applications that do not require such features have just to
configure
NO hardware flow control and NO DCD detection on their side. Both ends should have the same
configuration for better use of the complete version of the cables.
Cable #1: Cyclades RJ-45 to DB-25 Male, Straight Through
Application: It connects Cyclades products (serial ports) to modems and other DCE RS-232 devices.
RJ-45
DB-25 Male
RJ-45
Male
TxD 3
RxD 6
Gnd 4
DTR 2
DSR 8
DCD 7
RTS 1
CTS 5
DB-25
Male
TxD 2
RxD 3
Gnd 7
DTR 20
DSR 6
DCD 8
RTS 4
CTS 5