PoE/PoE+ Planning and Implementation Guide 2011-09

7-1
7
Planning and Implementation for the E2620
PoE+ Switches
This chapter discusses the planning process a user should follow to
successfully implement PoE+ using an E2620 Switch. After understanding
what PoE+ is and its operating rules, the next step to implementation is
planning. See “General Considerations” page A-1, for an example list of
considerations during the planning phase.
Planning Your PoE Configuration
This section assists you in building a PoE+ configuration. Using the following
examples you can plan, build, and connect PoE+ devices quickly and easily.
There are six configurations:
■ HP E2620-24-PPoE+ Switch
■ HP E2620-24-PoE+ Switch
■ HP E2620-24-PoE+ Switch connecting an external power supply
■ HP E2620-48-PoE+ Switch
■ HP E2620-48-PoE+ Switch connecting an external power supply
Each example shows a complete configuration. A table shows the PoE+ power
available to connected PoE+ devices when using just the switch and when
connecting an external power supply.
Once you have selected your specific configuration and the PoE+ power
provided, you then add up the maximum amount of power each device
requires (use maximum power in watts, usually found on a product’s data
sheet). Adjust this total maximum power figure by adding 16% to account for
possible line loss. This value must be less than the maximum power available
shown in the table for your configuration.