Xyplex Terminal Server 720 Manual page 24

I/O and Cabling Considerations
I/O Card RJ-45
Connector
Female
Male
RJ-45
RJ-45
Female RJ-45 Male RJ-45
Connector Connector
1 1
CTS/RING
2 2
DTR
3 3
XMT
4 4
XMTGND
5 5
RCVGND
6 6
RCV
7 7
DSR *
8 8
RTS
*
(See Note, after Figure)
Note In order to expand the functionality of the serial interface, the RJ-45 modular
cabling allows you to connect different signals to pin 7 of the server. (This pin is
an input to the terminal server serial port.) When a DCE device is connected to a
terminal server serial port, the device's DCD output is connected to pin 7. In this
case, the signal at pin 7 is referred to as DCD.
When a DTE device is connected to a terminal server serial port, the device's
DTR output is connected to pin 7 of the terminal server. In this case, the signal at
pin 7 is referred to as DSR. (This cabling scheme also provides DECconnect
compatibility, since DECconnect does not support the DCD signal.)
3-26
Crossover Cable
Male RJ-45
Connector
Crossover Cable
Figure 3-3. Terminal Server to DTE Adaptor Wiring
Modular Adaptor
Female
Male
RJ-45
RJ-45
Female RJ-45
Connector
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
Adaptor Wiring - MX-350-0181
(Female RJ-45 to female DB-25)
DTE Cable
Female
To DTE Device
DB-25
Female DB-25 DTE Device
Connector Pin Signal
5 CTS
20 DTR
2 XMT
7 GND
3 RCV
8 DCD
6 DSR
4 RTS
0021