HP AD278A and AD279A PCI Multiplexer Support Guide, November 2008

Table B-12 RS-232 RJ-45 Pinouts to HP Proprietary DB-25 Pinouts
DB-25 (HP proprietory device end)RJ-45 10-Pin Plug (MUX Port End)
SignalPinPinSignal
Data Set Ready20Connected to2Data Set Ready
Clear to Send22Connected to8Clear to Send
Data Carrier Detect4Connected to10Data Carrier Detect
Signal Ground7Connected to7Signal Ground
Transmit Data3Connected to5Transmit Data
ShellChassis round
Receive Data2Connected to6Receive Data
Data Terminal Ready6Connected to9Data Terminal
Ready
Request to Send8Connected to3Request to Send
Ring Indicator9Connected to1Ring Indicator
Table B-13 shows the pin-out connection between the DB-25 adapter and the HP proprietary
RJ-45 device.
Table B-13 RS-232 DB-25 Pinouts to HP Proprietary RJ-45 Pinouts
RJ-45 (HP proprietory device end)DB-25 (Card End)
SignalPinPinSignal
6Data Set Ready
Clear to Send4Connected to5Clear to Send
8Data Carrier Detect
Signal Ground6Connected to7Signal Ground
Transmitted Data3Connected to2Transmitted Data
ShellChassis Ground
Received Data1Connected to3Received Data
20Data Terminal
Ready
Request to Send5Connected to4Request to Send
22Ring Indicator
Table B-14 shows the pin-out connection between the DB-25 adapter and the HP proprietary
DB-25 device.
Table B-14 RS-232 DB-25 Pinouts to HP Proprietary DB-25 Pinouts
DB-25 (HP proprietory device end)DB-25 (Card End)
SignalPinPinSignal
Data Set Ready20Connected to6Data Set Ready
Clear to Send22Connected to5Clear to Send
Data Carrier Detect4Connected to8Data Carrier Detect
Signal Ground7Connected to7Signal Ground
Cabling Pin-outs for HP Proprietory RJ45 and DB25 Devices 39