Power Reach Installation Planning

There are various ways to take advantage of the advanced power capabilities of Perle eXP PoE Ethernet Extenders when planning deployment with PoE devices. In the scenarios below, each table provides guidance on the relationship between the maximum cable distance and the available power at the remote site.

Actual distance and rates experienced will depend on the condition and gauge of wire used. This Rate/Reach table applies to 24 AWG (0.5 MM) twisted pair wiring on RJ45 (RJ) and terminal block (TB) models of Perle eXP PoE Ethernet Extenders. Total power budget is also limited by the amount of power available from any local AC Adapter used.

1. PoE Extension – Long Reach

For long reach applications, the remote extender provides power to PoE devices such as IP cameras and Access Points. A locally attached AC Adapter is used. There is no effect on the level of PoE power delivered to the PoE Powered Device (PD).

2. Power over VDSL

When there is a requirement for a PoE PD to be connected over 2-wire twisted pair or coaxial cable and no AC power is available at the remote site, the eXP series can provide power to the remote site over the VDSL Interlink. The remote Ethernet Extender will derive its power parasitically from the line and pass along the remaining power to the PoE device.

Alternatively a PoE+ switch or injector can be used to power the local Ethernet Extender.

3. Using Power Multiplier Feature

If a 4-pair cable such as CAT5 is used for the VDSL Interlink, the power multiplier feature can be enabled which provides the capability to provide both power and ethernet over longer distances. This is done by providing power over 3 pairs of wires with VDSL data on the 4th pair.

There may be occasions where even though there are no PoE devices on the link, the remote extender simply requires parastic power from its peer extender over the VDSL link.