Fiber Optic Ports, Jabber Protection | Cabletron Systems E3100

INTRODUCTION

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 μm, 62.5/125 μm, and 100/140 μm 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).

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