Cabling Considerations
B.3.3
Modular Adaptors (RJ-45 to DB-25)
You can obtain adaptors with male and female DB-25 connectors from Xyplex. These adaptors direct
signals from the RJ-45 connector on the cable to the correct pin on the DB-25 connector. Figures B-3 and
B-4 show how devices are cabled when you use these adaptors. Figure B-5 shows RJ-45 and DB-25 pin
assignments.
Flow Control and Modem Control
MAXserver 1600 and 1608 serial ports can be set up to support RTS/CTS flow control. Section 5.6 of the
Software Management Guide describes flow control options and explains how to set up flow control at a
port. The adaptors shown in Figures B-3 and B-4(b) support RTS/CTS flow control. MAXserver 1600/1608
serial ports can also be set up to support modem control. Section 5.5 of the Software Management Guide
describes modem control options and explains how to set up modem control at a port. The adaptor shown
in Figure B-4(a) supports modem control, by supporting the RING signal.
Using Existing MAXserver 1000-series Cabling
The adaptors shown in Figures B-3 and B-4 are new models, which have been designed for use with the
MAXserver 1600/1608. If you have existing MAXserver 1000-series cabling at your site, the cabling can
be used to connect MAXserver 1600/1608 ports to DTE devices -- provided you do not need to turn on
RTS/CTS flow control at the ports. If you plan to connect the MAXserver 1600 to a DCE device, you
should use one of the adaptors shown in Figure B-4.
CTS
DTR
XMT
GND
RCV
DCD
DSR
RTS
Female RJ-45
Connector
Female DB-25
Connector
DTE Device
Pin Signal
Adaptor Wiring - MX-350-0181
(Female RJ-45 to female DB-25)
Male RJ-45
Connector
Male RJ-45
Connector
Crossover Cable
MX-1600
Connector
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
5
20
2
7
3
8
6
4
CTS/RING
DTR
XMT
XMTGND
RCVGND
RCV
DSR *
RTS
Male
RJ-45
Male
RJ-45
Female
RJ-45
Female
RJ-45
Female
DB-25
Crossover Cable
MAXserver
Connector
Modular Adaptor
To DTE
DTE Cable
*
(See Note, Page 6)
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