Cabletron Systems Ethernet Hubs manual Irbm Hubs

Cabletron Hub LEDs

IRBM Hubs

ON (AUI)

This LED is located above the AUI port and to the left of the PW LED. It indicates that the AUI port is the active repeater port.

PW (Power)

This LED is located above the AUI port and to the right of the ON LED. It indicates that the AUI port is receiving power.

ON (FO)

This LED is located below the AUI port and to the left of the LN LED. It indicates that the fiber optic port is the active repeater port.

LNK (Link)

This LED is located below the AUI port and to the right of the ON LED. It indicates that a link has been established between the port and the fiber optic device.

IRBM Hubs

The IRBM is divided into two sets of LEDs. One set, located in the right-hand LED column, is associated with the IRBM’s repeating functions and a second set is associated with the IRBM’s bridging functions. The repeater set has the same functions as the LEDs described for the IRM2. The bridging set of LEDs is as follows:

ON (On Line)

This LED is located at the top of the left-hand LED column. It indicates that the IRBM’s bridging functionality is on line and operational.

ST (Stand By)

This LED is located below the ON LED. It indicates that the IRBM’s bridging functionality is in the standby mode and is not capable of forwarding packets.

RC (Receive)

This LED is located below the ST LED. It indicates that the IRBM’s bridge port is receiving data packets.

XM (Transmit)

This LED is located below the RC LED. It indicates that the IRBM’s bridge port is transmitting packets to the segment connected to it.

CP (Collision Present)

This LED is located below the XM LED. It indicates that a collision is occurring on the segment connected to the IRBM’s bridge port. On some IRBMs, this LED may be labelled CP.

PO (Power)

This LED indicates that the hub is receiving power.

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