The IEEE has approved in September 2005 the creation
of the IEEE802.3at DTE Power Enhancements Task Force.
The 802.3at standard should extend the 802.3af power
delivery and port-level resiliency capabilities, what
would largely extend the number of applications that
could benefit from Power over Ethernet.
802.3at Objectives:
The 802.3at Task Force objectives are along the following lines:
- 802.3at should operate on CAT5 and higher
infrastructure, unlike 802.3af, that had take into
account the CAT3 limitations
- 802.3at should follow the power safety rules and
limitations pertinent to 802.3af
- A 802.3at PSE must be backwards compatible with
802.3af, being able to power both 802.3af and 802.3at
PD's
- 802.3at should provide the maximum power to PD's as
allowed within practical limits, at least 30W
- 802.3at PDs, when connected to a legacy 802.3af PSE,
will provide the user an indication that a 802.3at PSE
is required.
- Research the operation of midspans for 1000BASE-T
- Research the operation of midspans and endspans for
10GBASE-T
Listen to a webcast held by Cabling
Installation & Maintenance, entitled "PoE Plus -
The next generation of Power over Ethernet".
Webcast originally broadcasted on October 25, 2006.
>> Click for more <<
PowerDsine continues to be a major force at Power
over Ethernet standardization, driving the 802.3at
study group as it did before during the 802.3af
standardization process. PowerDsine is also the first
company to provide pre-standard 802.3at equipment,
through its
"8000-series High Power Midspans"
and Splitters and its PD83000 High-Power Controller
for the design of High PoE Switches and Midspans.
