Instruction manual

Quick Reference Information
1-6 893-839-C
1 Media Adapter Slots
Media adapter slots A and B are available for optional media adapter modules
(see F
igure 1-7). These 10BASE-T, AUI, 10BASE2, and fiber adapters provide
flexible backbone connectivity or redundant links. Each slot has a correspond-
ing status LED (Media Adapter A, B) on the LED display. Filler panels cover
the slots when not in use. For information about installation and connectivity of
media adapters, refer to the documentation included with your media adapter.
Figure 1-7. Installed fiber and RJ-45 10BASE-T media adapter modules
2 Communications Port
This RS-232 (DB-9 male) communications port can be used in conjunction
with an NMM as a service port. T
able 1-3 shows the pin assignments and signal
format for the communications port.
Table 1-2. Communications port pin and signal information
Pin assignment Pin number and signal Signal format
1 DCD (input) 6 DTR (output) 9600 baud
2 TXD (output) 7 CTS (input) 8 data bits
3 RXD (input) 8 RTS (output) 1 stop bit
4 DSR (input) 9 RI (input) No parity
5 GND
7390
Comm P
o
A Media Adapter B
TX
10BASE-FL 10BASE-T MDI
RX
5878
15
69
DB-9 male
893-839-CBook Page 6 Thursday, December 12, 1996 4:18 PM