INTRODUCTION
Page 1-3
1.2.4 Fiber Optic Ports
The fiber optic ports on the adapter employs two ST type fiber
optic connectors. The dark gray ST connector is the fiber optic
receive port and light gray ST connector is the fiber optic transmit
port. The ST connector fiber optic ports can utilize
50/125
µ
m, 62.5/125
µ
m, and 100/140
µ
m fiber optic cables.
1.2.5 Jabber Protection
A built-in jabber protection scheme ensures that the network is
not disabled due to the transmission of excessively long packets
(jabber). This protection scheme automatically interrupts the port
for 96 bit times (1 bit time = 100 ns.) if the port has been
transmitting continuously for more than 65,536 bit times.
1.2.6 LANVIEW LEDs
Cabletron Systems’ adapters incorporate Cabletron Systems’
LANVIEW Status Monitoring and Diagnostic System. The
LANVIEW LEDs help you diagnose problems, such as failure to
establish a twisted pair link between the adapter and an Ethernet
device at the far end of the link. Individual LEDs advise you when
the adapter is receiving or transmitting data packets, or when a
collision condition exists on the network (see Figure 1-1).
•
Media Link Good (LNK) LED
fiber optic adapters
When lit, this green LED indicates that a link has been established
between the fiber optic port on the adapter and the fiber optic
device at the other end of the fiber optic link segment. This LED
remains lit as long as the link is maintained.
•
Link OK (LNK)
10BASE-T only
When lit, this LED indicates that a link has been established
between the adapter and the device at the other end of the
Ethernet segment (green indicator).
