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126 BES50 fundamentals
The switches use store-and-forward switching to ensure maximum data
integrity. With store-and-forward switching, the entire packet must be
received into a buffer and checked for validity before being forwarded. This
prevents errors from being propagated throughout the network.
Power over Ethernet capability
Each switch provides 12 front panel RJ-45 ports that support the IEEE
802.3af Power over Ethernet (PoE) standard. Any 802.3af-compliant device
attached to a port can directly draw power from the switch over the Ethernet
cable without requiring its own separate power source. This capability gives
network administrators centralized power control for devices such as IP
Phones and wireless access points, which translates into greater network
availability.
Network management options
The switches contain a comprehensive array of LEDs for at-a-glance
monitoring of network and port status. They also include a management
agent with which you can configure or monitor the switch by using its
embedded management software.
You can manage the switch through a network connection (in-band) by
using the onboard Web-based user interface.
Hardware components
This section describes the BES50 Series hardware components.
10/100/1000BASE-T ports
The BES50FE-12/24T PWR features 12/24 10/100BASE-T ports and the
BES50GE-12/24T PWR features 12/24 10/100/1000BASE-T ports with
RJ-45 connectors located on the front panel of the switch. All ports support
automatic MDI/MDI-X operation, so you can use straight-through cables for
all network connections to PCs or servers, or to other switches or hubs.
Each of these ports support autonegotiation, so the optimum transmission
mode (half or full duplex) and data rate (10, 100, or 1000 Mbps) can be
selected automatically. If a device connected to one of these ports does
not support autonegotiation, the communication mode of that port can be
configured manually.
Each port also supports IEEE 802.3x autonegotiation of flow control, so the
switch can automatically prevent port buffers from becoming saturated.
Copyright © 2006, Nortel Networks
.
SMB
Using the Nortel Business Ethernet Switch 50 Series
NN47924-301 01.01 Standard
1.00 October 2006
Nortel Networks Confidential
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