2-10
Cisco SFS 7024 Hardware Users Guide
OL-8794-02
Chapter
Figure 2-3 Bend Radius Measurement Diagram
• Support cable using a cable manager mounted above connectors to avoid unnecessary weight on the
cable bundles.
• Bundle cables using velcro straps to avoid damaging cables.
• Keep all ports and connectors free of dust.
• Unshielded Twisted Pair (UTP) cables can build up Electrostatic Discharge (ESD) charges when
being pulled into a new installation. Before installing category 5 UTP cables, discharge ESD from
the cable by plugging it into a port on a system that is not powered on.
• When required for safety and fire rating requirements, plenum-rated cable can be used. Check the
local building codes to determine when it is appropriate to use plenum-rated cable, or refer to IEC
standard 850.
Power Requirements
Power Supply
• The switch power supplies have a maximum power consumption requirement of 350W. Also ensure
that the site meets all power supply requirements.
• Before installation and periodically after installation, check that the site is receiving clean power.
Install a power conditioner if necessary.
• Be sure the site is properly grounded to avoid damage from lightning and power surges.
Uninterruptible Power Supply
Consider the following when selecting Uninterruptible Power Supply (UPS) equipment:
• The minimum amperage requirements for a UPS:
–
Calculate VA (Volt-Amps): Locate the voltage and amperage requirements for each piece of
equipment (usually located on a sticker on the back or bottom of the equipment). Multiply the
numbers together to get VA.
–
Add the VA from each piece of equipment together to find the total VA requirement. Then add
30% to determine the minimum amperage requirements for the UPS.
• Transition time (the time necessary for the UPS to transfer from utility power to full-load battery
power).
• The longest potential time period the UPS might be required to supply backup power.
• Whether or not the UPS unit also provides online protection.
