893-743-A
C-1
Appendix C Pin Assignments
This appendix lists the pin assignments for the connectors on Model 281xSA
Ethernet Hubs and describes how to use the RS-232 port for making out-of-
band connections.
AUI Port
Table C-1 shows the pin assignments for the DB-15 connector on the AUI port
on the Model 281xSA hub.
Table C-1. AUI port pin assignments (DB-15 socket)
Connector
Pin #
Signal
Pin #
Signal
1
2
3
4
5
6
7
8
GND
CI-A
DO-A
GND
DI-A
GND
(NC)
GND
9
10
11
12
13
14
15
CI-B
DO-B
GND
DI-B
+12V
GND
GND
NOTE:
Do not connect the AUI port on a Model 2813SA hub directly to the
AUI port on an Ethernet station.
1
8
15
9
2012.4