Getting Acquainted with the GRF 400
Overview of the GRF 400 base unit
GRF 400/1600 Getting Started - 1.4 Update 2
October, 1998
1-9
par le constructeur. Mettre au rebut les batteries usagées conformément aux instructions du
fabricant.
Power supplies
The GRF 400 can use either AC or DC (negative 48VDC) power supplies. GRF systems are
shipped with the power supply installed. Power supplies are housed in open frame drawers for
cooling by the chassis fans. Only qualified personnel can service and replace GRF 400 power
supplies.
Remember that the GRF 400 does not have a power on/off switch. When the power supplies
receive current, the GRF powers on and, since the software is already loaded, immediately
begins to boot.
Redundant units
Two power supplies can be installed for redundancy. When two units are present, both are
active, load-sharing devices. If one fails, the other unit ramps up to provide the full load. Each
power supply has an LED on the control board.
Looking from the cabling end of the chassis, the power supplies are mounted on the left side.
The bottom power supply is numbered 1, and the upper supply is numbered 2. In a
non-redundant system, the single power supply unit can be installed in either 1 or 2, it does not
matter.
If a unit failure occurs in a redundant system, the failed unit can be hot swapped out. The unit
being removed must be unplugged or disconnected from its AC or DC power source.
Failure notification
If a power supply fails, you will see failure messages on-screen at the user interface. The
/var/log/gr.console
log
file will also contain related messages. The green PS1-OK or
PS2-OK LED on the control board goes off to indicate a power supply failure. If you do not
already have a replacement unit, order one from Lucent.
