Specifications

Masterclock, Inc.
January
phone (USA and Canada): 1-800-940-2248 | phone (international): [phone]
email: [e-mail] | online: www.masterclock.com
Power-over-Ethernet (PoE) extends the versatility for system designers and companies. No longer will
one have to locate access points within the typical six foot electrical cord reach of an AC outlet or look
for convenient locations to install new outlets at points where its suitable to run conduit and mount
outlet boxes.
PoE only requires technicians to run one Ethernet cable – CAT5 or CAT6- to the access point for
supplying both power and data. With PoE, Power-sourcing equipment detects the presence of an
appropriate “power device” (e.g. PoE Hub) and injects applicable current into the data cable. An access
point can operate solely from the power it receives through the data cable. The PoE is known by
IEEE802.3af international standard.
PoE offers the following benefits:
Cost Savings – It significantly reduces the need for electricians to install conduit, electrical wiring and
outlets throughout a facility. Consider an installation of 50 or more access points. This requires lots of
conduits, outlet boxes, electrical wiring and the time of qualified electrician(s). The low cost of deploying
PoE compared to traditional electrical circuits leads to worthwhile returns on investment.
Flexible Access Point Locations – With PoE a LAN designer has greater freedom to locate access points.
You don’t need to depend on only locations within short distances from AC outlets. This makes it easy to
relocate access points in the future if a need arises.
Higher Reliability – Systems with fewer wires tend to be more reliable. With LANs not using PoE, an
electrician may unplug an access point to use its AC outlet to power their equipment. Electricians
rewiring electrical circuits could inadvertently cut power to an access point. PoE eliminates the
possibility of situations that disrupt the operation of the network.
Enhanced Operational Support – Many PoE devices implement SNMP (simple network management
protocol), which enables support staff to remotely manage the electrical power supplied to the access
points. Support staffs can disable a PoE-enabled access point by shutting off its access point after
detecting a malfunction or tampering. The temporary disabling of the access point can protect against in
intruder from continuing unauthorized access to the device(s). Other SNMP-based features enable the
monitoring of the condition and consumption of power, which enhance the ability to ensure smooth and
efficient network operation.
Easier International Development – For manufacturers, PoE offers the benefit of the vendor not needing
to provide different power cords for various countries. This not only helps keep the cost of access points
down—it is one less piece of equipment that installer need to worry about.
Power-over-Ethernet (PoE) requires:
(Injector) + (PoE compatible device)
Voltage and Pinout Standards – The IEEE has standardized on the use of 48 VDC as the injected PoE
voltage. The use of this higher voltage reduces the current flowing through the CAT5 / CAT6 cable and
therefore increases the CAT5 / CAT6 cable length limitations.
All Masterclock, Inc. equipment labeled PoE compatible or compliant will accept and operate from the
48 VDC that is supplied over the CAT5 / CAT6 cable.
Information
Benefits of PoE
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