Chapter 4: Hardware interfaces
74
LAN interface
4.8 LAN interface
4.8.1 Overview
The terminal has four Ethernet LAN ports with Power over Ethernet (PoE). The
standard for the Ethernet ports is IEEE 802.3af, and the connectors are RJ-45
connectors.
4.8.2 Power over Ethernet (PoE)
One power supply powers all four interfaces with a floating 48 V DC supply
(44 - 57 V DC). Therefore, the interfaces are not galvanically separated from
each other. All Tx signals are DC connected to the Positive PoE Voltage and all
Rx signals to the Negative PoE Voltage.
The total output power from all 4 interfaces is
•
64 W at 24 V DC power supply
•
32 W at 12 V DC power supply.
All interfaces can support devices of power class 1, 2 and 3 (4, 7 and 15.4 Watt),
as long as the total power consumption does not exceed the above limits. If
the limits are exceeded, the LAN ports are prioritized so that LAN port 1 has the
highest priority. For example, if all ports are used and the total power
consumption is too high, port 4 is shut down.
Summary of Contents for FB250
Page 13: ...Table of contents xii ...
Page 77: ...Chapter 3 Connecting power 64 Connecting power ...
Page 105: ...Chapter 5 Starting up the system 92 Operating the system ...
Page 129: ...Chapter 6 Service and repair 116 Replacing modules in 34 3052B antenna ...
Page 139: ...Chapter 7 Troubleshooting 126 Logging of events ...
Page 165: ...Appendix B Technical specifications 152 TracPhone terminal ...
Page 197: ...Glossary 184 ...