Establishing The System Ground; Required Tools And Equipment - Cisco Catalyst PON Series Hardware Installation Manual

Installation
Step 4
If the module has a bale-clasp latch, pull the bale out and down to eject it from the module. If the latch is
obstructed and you cannot use your finger, use a small flat-blade screwdriver or any other long and narrow
instrument to open the latch.
Step 5
Grasp the SFP or SFP+ module, and carefully remove it from the module slot.
Step 6 Place the module in an antistatic bag or any other protective environment.

Establishing the System Ground

This section describes how to connect a system ground to the OLT.
Caution Installations that rely solely on system grounding using only an AC third-prong ground, run a substantially
greater risk of equipment problems and data corruption than those installations that use both the AC third-prong
ground and a properly installed system ground.
The system ground provides additional grounding for EMI shielding requirements and grounding for the low
voltage supplies (DC-DC converters) on the modules. You must observe the following system grounding
guidelines for your chassis:
• You must install the system ground connection with any other rack or system power ground connections
• You must connect both the system ground connection and the power supply ground connection to an
• When using DC-input power supplies, you must install the system (ground before you attach the source
Note
In all situations, grounding practices must comply with Section 250 of the National Electric Code (NEC)
requirements or local laws and regulations. We recommend a 6-AWG grounding wire from the chassis to the
rack ground or directly to the common bonding network (CBN). The equipment rack should also be connected
to the CBN with a 6-AWG grounding wire.
The system ground serves as the primary safety ground for chassis that is equipped with DC-input power
supplies. The DC-input power supplies for these chassis do not have a separate ground.

Required Tools and Equipment

To connect the system ground, you need the following tools and materials:
• Grounding lug: When using the double-hole lug connector provided with the system, the ground wire
• Grounding screws: One M4 x 8 mm (metric) pan-head screws. Supplied as part of the accessory kit.
that you make. The system ground connection is required if FXS modules are installed or if this equipment
is installed in a U.S. or European Central Office.
earth ground. The system ground connection is required if FXS modules are installed or if this equipment
is installed in a U.S. or European Central Office.
DC power cables to the DC PEM. Power down the chassis before attaching the system ground.
must be 6-AWG only. Otherwise, a supported closed-loop ring connector must be used for 8-AWG to
14-AWG wire.
Cisco Catalyst PON Series Switches Hardware Installation Guide
Establishing the System Ground
21