2-12
October, 1998
GRF 400/1600 Getting Started - 1.4 Update 2
Getting Acquainted with the GRF 1600
Overview of the GRF 1600 base unit
Power supply options
The GRF 1600 uses either AC or DC (negative 48VDC) power supplies. GRF systems are
shipped with the power supply installed. Power supplies are housed at the bottom of the chassis
in self-contained, self-cooled drawers. Visible from the cabling end of the chassis, power
supply 1 (PS1 LED) is on the left, power supply 2 (PS2 LED) is on the right. In a
non-redundant system, the single power supply unit can be installed in either 1 or 2, it does not
matter. Only qualified personnel can service and replace GRF 1600 power supplies.
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 (PS1, PS2) on the control board. 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.
Each power supply has an internal fan to cool that unit. Air is drawn in at the drawer front and
exhausted out the rear of the drawer. If a power supply overheats, its internal regulators will
shut the unit down.
Power supply failure notification
If a power supply fails, you will see failure messages on-screen at the user interface. The
gr.console
log file will also contain related messages. The amber PS1 or PS2 LED on the
GRF 1600 control board will come on to indicate a power supply failure. If you do not already
have a replacement unit, order one from Lucent.
Warning:
A failed power supply must be replaced by certified personnel only.
Warnung:
Das Netzteil darf nur von einer Fachkraft ausgewechselt werden.
