Page 13 - 2015 Master Catalog
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Simple Network Management Protocol (SNMP)

Failure conditions and specific events discovered by EtherWAN's Managed Ethernet Switch series are reported
to multiple user-defined destinations in the form of a SNMP trap.

IEEE802.3az Energy Efficient Ethernet (EEE)

Energy-Efficient Ethernet is a set of enhancements to the twisted-pair and backplane Ethernet family of
computer networking standards that allow for less power consumption during periods of low data activity. The
intention was to reduce power consumption while retaining full compatibility with existing equipment.

The Institute of Electrical and Electronics Engineers (IEEE), through the IEEE 802.3az task force developed
the standard. Some companies introduced technology to reduce the power required for Ethernet before the
standard was ratified, using the name Green Ethernet.

In 100 Mbit/s, 1 gigabit and 10 Gbit/s speed data links, energy is used to keep the physical layer transmitters
on all the time. If they could be put into "sleep" mode when no data is being sent that energy could be saved.
By sending a low-power-idle (LPI) indication signal for a specified time the transmit chips in the system can
be turned off. LPI is sent periodically to refresh the sleep mode. When there is data to transmit a normal idle
signal is sent to wake the transmit system up before data is due to be sent. The data link is considered to be
always operational, as they receive signal circuit remains active even when the transmit path is in sleep mode.

Spanning Tree Protocol (STP, IEEE802.1D)

STP is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The
basic function of STP is to prevent bridge loops and the ensuing broadcast radiation. STP also allows a network
design to include spare (redundant) links to provide automatic backup paths if an active link fails, without the
danger of bridge loops or the need for manual enabling/disabling of the backup links.

UPoE (60W PoE/PSE)

UPoE is High Power PoE Specifications, integrated with 60W PoE/PSE switching support.

UPoE offers highly efficient four-pair operation, and full compliance with the IEEE 802.3at draft 4.1 high-power
PoE specifications. It supports 2-event classification as specified in the latest IEEE 802.3at specifications.

Until today, the barrier to PoE adoption was its restriction to 15.4W and 30W, respectively, in 802.3af and
802.3at applications. UPoE will enable a host of new Ethernet applications to take full advantage of the well-
known PoE benefits at 60W power levels.

  Key Features
   * 802.3at draft 4.1 compliant, which delivers up to 60W on 4-pairs
   * 2-event classification
   * 10/100/100 Base-T support

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