ZyXEL RS-1612 User Manual download pdf (Page 17)

panel. For racks with redundant power supplies, turning both

power supplies on ensures the rack remains energized if one power

supply fails.

Fuse

The fuse protects the power supply card from an over current

condition. The fuse for the AC power supply is a 250VAC 3A fuse.

The DC power supply uses a 250VAC 5A fuse.

LEDs

Two LEDs on the power supply card indicate the power supply

status. These LEDs are not normally visible because they are

blocked by the control panel and power supply circuitry. Their

primary purpose is for troubleshooting if the rack has power

problems. An Amber LED lights when the power supply has power

available but the power supply switch is off, (e.g. the master switch

is on and external power is connected). A green LED next to the

amber LED lights when the power supply is on.

Rear Panel

The rear panel has all the connections for hooking up phone lines

and computers to the U-336R/RE modem cards as shown below:

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ZyXEL RS-1612 User Manual Page 17