Diagram 2: Typical PoE installation utilizing a powered patch panel midspan Power Source Equipment (PSE) to support common low power Ethernet devices.

Benefits of PoE
Network equipment investments are expected to provide functionality that supports current and future productivity enhancements. Deploying a PoE network today offers the following advantages that will also support tomorrow’s innovations.

Lower Cost
PoE eliminates the need for running both data and power wires to each network device. WAPs and security cameras can be installed without the additional expense of contracting an electrician to install AC outlets where deployed. PoE also helps protect IT investments as it is forward and backward compatible with other Ethernet protocols. Furthermore, PoE devices that are Simple Network Management Protocol (SNMP) manageable can be remotely monitored and controlled to efficiently manage or troubleshoot power consumption and/or failures.

More Flexible
Network devices can be installed and re-located where performance is optimum, without concern of an existing AC outlet. This is especially important for devices like WAPs, which may require installations in hard to reach locations, such as the ceiling, in order to achieve the broadest coverage.

More Reliable
Centralized power sources that are SNMP manageable protect against power overloads, outages, surges and spikes. When PoE is implemented with uninterruptible power supplies (UPS) or battery backups, it allows enterprises to distribute power, even when the AC electrical power is down. This enables replacement of conventional telephones with feature-rich VoIP phones that will continue to retain lifeline reliability benefits.

Due to all of these advantages, PoE continues to generate a lot of interest and excitement among IT vendors and consumers.

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