AD278A/AD279A PCI MUX Support Guide, June 2006

Peripheral Connections
RS-232 Asynchronous: RJ-45
Appendix B
52
IMPORTANT Some terminal or printer manufacturers may use different methods of flow control. Consult
your documentation for specific wiring requirements.
RJ-45 10-Pin Plug to DB-25 Modem Cable
The simplest way to connect a modem to a RoHS RJ-45 jack is to use a RoHS RJ-45 to DB-25 cable adapter.
Table B-10 lists the pin-out connection between the RJ45 adapter and the DB-25 modem cable, and also
shows how to apply the adapter wiring scheme to custom modem cables.
CTS 8 Connected to 4 RTS
DTR 9 Connected to 6+8 DSR+DCD
Table B-10 RJ-45 to DB-25 Modem Cable ( 10 Wire )
RJ-45 (Card End)
DB-25 Male (Modem End)
Signal Pin Pin Signal
RI 1 Connected to 22 RI
DSR 2 Connected to 6 DSR
RTS 3 Connected to 4 RTS
GND 4 Connected
(via shield)
to
1 (or shell) GND
TxD 5 Connected to 2 TxD
RxD 6 Connected to 3 RxD
SG 7 Connected to 7 SG
CTS 8 Connected to 5 CTS
DTR 9 Connected to 20 DTR
DCD 10 Connected to 8 DCD
Table B-9 Terminal/Printer Cable for Software (XON/XOFF) or Hardware
(RTS/CTS) Handshaking (Continued)
RJ-45 8 10-Pin (Card End)
DB-25 Male
(Terminal/Printer)