HP AD278A and AD279A PCI Multiplexer Support Guide, November 2008

Table B-14 RS-232 DB-25 Pinouts to HP Proprietary DB-25 Pinouts (continued)
DB-25 (HP proprietory device end)DB-25 (Card End)
Transmitted Data3Connected to2Transmitted Data
ShellChassis Ground
Received Data2Connected to3Received Data
Data Terminal Ready6Connected to20Data Terminal
Ready
Request to Send8Connected to4Request to Send
Ring Indicator9Connected to22Ring Indicator
Table B-15 shows the pin-out connection for RS-232 RJ-45 (AD280A port module) to
A6748A/A6749A RJ-45 converter. The following connection generates RJ-45 signals compatible
with A6748A/A6749A RJ-45 ports.
Table B-15 RS-232 RJ-45 to A6748A/A6749A RJ-45 Converter
RJ-45 10-Pin JackRJ-45 10-Pin Plug (AD280A End)
SignalPinPinSignal
RI1Connected to1RI
DSR10Connected to2DSR
RTS2Connected to3RTS
GND5Connected (via
shield) to
4GND
TxD6Connected to5TxD
RxD4Connected to6RxD
SG7Connected to7SG
CTS9Connected to8CTS
DTR3Connected to9DTR
DCD8Connected to10DCD
Table B-16 shows the pin-out connection for RS-232 DB-25 port to A6748A/A6749A RJ-45 converter.
The following connection generates signals compatible with A6748A/A6749A RJ-45 ports.
Table B-16 RS-232 DB-25 to A6748A/A6749A RJ-45 Converter
RJ-45 10-Pin JackDB-25 10-Pin Plug (AD280A End)
SignalPinPinSignal
GND5Connected toShellGND
TXD6Connected to2TXD
RXD4Connected to3RXD
RTS2Connected (via
shield) to
4RTS
CTS9Connected to5CTS
DSR10Connected to6DSR
SG7Connected to7SG
40 Peripheral Connections