HP 480 manual Interpreting Back-Panel LEDs, Optical Bypass - Enabled green

Router Operation

Interpreting Back-Panel LEDs

Optical Bypass — Enabled (green):

If you are using a bypass switch, the Optical Bypass—Enabled LED lights only when the switch is causing the FDDI ring to bypass the router. (The router will be bypassed when it is booting and when the FDDI circuit is disabled.) That is, the Optical Bypass LED is not lit when the FDDI circuit is enabled.

If you are not using a bypass switch, the Optical Bypass—Enabled LED is always lit, regardless of the state of communication between the router and the FDDI ring.

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