2-2
C
HAPTER
2: O
VERVIEW
OF
THE
FDDIL
INK
M
ODULE
Typical Network
Configuration
Figure 2-1 shows a typical use of a mixed-mode FDDILink module and the
NETBuilder II bridge/router in a network.
Figure 2-1
Typical Mixed-mode FDDILink Module and NETBuilder II Bridge/Router
Network
Module Components
This section describes the components of the FDDILink module (see Figure 2-2).
Figure 2-2
FDDILink Module Components
LEDs
The FDDILink module has three LEDs: One indicates the status of the whole
FDDILink module and the other two indicate the status of the physical fiber
connection to each transceiver. The A STATUS LED corresponds to the left
transceiver, and the B STATUS LED corresponds to the right transceiver. Table 2-2
explains the LED states.
CUPERTINO
SUNNYVALE
SANTA CLARA
campus
Multimode fiber
Sin
gle
-mo
de fib
er
single-mod
e fibe
r
®
STATUS
MULTI
MULTI
A STATUS
B STATUS
B
A
BYPASS
®
STATUS
MULTI
MULTI
A STATUS
B STATUS
B
A
BYPASS
FDDILink
FDDILink
NETBuilder II
bridge/router
in building 100
NETBuilder II
bridge/router
in building 200
Single-mode
A transceiver
Multimode
B transceiver
Multimode
A transceiver
Single-mode
B transceiver
FDDI SC
connectors
Optical
bypass
connector
Status LEDs
J1
J2
J3
®
FDDI
B
A
MULTI/MULTI
STATUS
A STATUS
B STATUS
BYPASS
