Specifications

Hardware Reference 31
C613-03086-00 REV A
An alternative method, for both terminal and modem cables, is to wire an R-45
patch cord (a straight pin-to-pin cable with RJ-45 connectors on both ends) and
then use an RJ-45-to-DB25 adaptor wired internally as a crossed cable. These
adaptors are available in both DB25 female and male versions from data
cabling suppliers, and are supplied with wires terminated on the RJ-45 socket
and pins on the free ends. The pins are inserted into the appropriate positions
in the DB25 shell.
Figure 1-10: Pin wiring diagram for a standard RJ-45 terminal cable.
Figure 1-11: Pin wiring diagram for a standard DB9 null modem cable.
RJ45
(to switch or router)
DB25
Female
1
2
3
4
5
6
7
8
20
22
5
6
7
8
4
3
2
1
←
→
←
→
→
←
←
(RXD)
(TXD)
(CTS)
(RTS)
(GND)
(DTR)
(DCD)
(RING)
Not connected
Not connected
Notes:
(1) → Output from switch or router; ← Input to switch or router.
(2) Cable version 1.0.
TERMINAL
DB9 Female
(to router/DTE)
DB9 Female
(to PC/terminal/DTE)
4
6
3
2
1
5
8
7
9
1
2
3
4
6
5
7
8
9
Notes:
(1) → Output from router; ← Input to router.
(2) Cable version 1.0.
DB9FDB9F
←
←
→
→
Not Connected
→
Not Connected
(DCD)
(RXD)
(TXD)
(DTR)
(GND)
(RTS)
(CTS)
Cable
Pin 9
Pin 6
Pin 5 Pin 1
DB9 Female — Pin View
Pin 9
Pin 6
Pin 5 Pin 1
DB9 Female — Pin View