Fan Module Installation
The fan module is pre-installed in the Acme Packet 3900 chassis when it ships. There
is no need to remove the fan module prior to installation. In the event that this part
needs service or replacement, you can remove and replace it with a functioning one.
Ground and Power Cable Installation
The Acme Packet 3900 must be properly grounded to ensure efficient performance.
Grounding your Acme Packet 3900 chassis is an extremely important part of the
installation and maintenance procedures. Physical harm or problems with system
functionality may occur on the Acme Packet 3900 if it is not properly grounded. If your
Acme Packet 3900 chassis is not properly grounded, the unit can exhibit unpredictable
problems such as:
•
Garbled output
•
Sudden crashes
•
Physical damage to the Acme Packet chassis and its hardware components
Caution:
Failure to ground the chassis properly can result in permanent damage to the
Acme Packet 3900 and its components. Bodily harm may also result under
some circumstances.
Caution:
The Acme Packet 3900 does not support mixing AC and DC power supplies
in the same chassis. A mixed power configuration is prohibited.
Your equipment rack location must have a local earth ground. This ground can be
either an unpainted spot on the grounded equipment rack frame, or a grounded bus
bar in the equipment room.
Grounding Cable Installation
The chassis grounding terminals are located on the rear of the Acme Packet 3900
chassis, to the left of the USB ports. The Acme Packet 3900 ships with 2 kep nuts
screwed onto the ground terminals. Use an 11/32” nut driver to remove and install
these kep nuts.
Chapter 3
Fan Module Installation
3-12