LevelOne was established in 1991 in Dortmund, Germany by Digital Data Communications GmbH.
By providing quality networking products and solutions, we've grown steadily throughout the years
with Branch Ofces in 20 countries around the world.
The Internet has become a deeply integral part of both business and home life. Our years of
experience have taught us that the only way to stay on top of the latest technology and trends is by
listening carefully to what the customer says.
DDC is headquartered in Germany, and also maintains branches in Taiwan, Australia, Belgium, Brasil,
Colombia, Denmark, East Africa, Greece, India, Italy, Israel, Latin America, Middle East, North Africa,
the Netherlands, Portugal, Slovenia, Spain and Sweden. We are currently achieving year-on-year
increase in turn-over. Our Production, Development, Distribution and Logistic Centers are growing
in number and setting new quality standards throughout the world with powerful and recognizable
brand names.
About LevelOne
1
PoE Overview
2
What is Power over Ethernet?
2
Growth in PoE Markets
2
PoE Standard: IEEE 802.3af
2
PoE Plus Standard: IEEE 802.3at
3
How does it work?
3
Why PoE?
3
Power Sourcing Equipment-PSE
4
Mid Span Hubs
5
PoE Switches
6
PoE Injectors
8
PoE Powerline Communication
9
Powered Devices-PD
10
PoE Splitters
11
PoE Network Cameras
12
PD Switches and PoE VoIP Phone
15
Wireless PoE Access Points
16
PoE Wireless Hotspot Gateway
17
Media Converters with PoE / PoE Repeaters
18
Fiber/VDSL2 Ethernet Converters with PoE
19
PoE Repeaters
20
Application
24
Adding PoE Function to an existing network
25
Outdoor Camera Housing
26
Advanced High Power Deployment
28
About
LevelOne
Contents