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Chapter 1: Understanding HDSL and the Express L768/L1.5
61202192L1-1 Express L768/L1.5 User Manual
7
Small Office - Home Office (SOHO) to Corporate LAN
• Connects the small office or home office to the corporate LAN
• Routes IP and Internet Packet Exchange (IPX) traffic from multiple devices
to the corporate LAN
• Bridges all non-routed traffic (e.g., AppleTalk)
• Low cost alternative to buying a high-end router
• Compatible with popular central site LAN access devices
Figure 1-4
SOHO to Corporate LAN
The Express L768/L1.5 provides the following basic functions:
1.
LAN Bridge:
Bridging provides a point-to-point connection between two
LANs. The bridge learning function scans the source and destination me-
dia access control (MAC) addresses of all packets on its local LAN and de-
termines which packets should be transmitted over the HDSL link.
Applications include connectivity between single user or small offices to
corporate LANs. The Express L768/L1.5 uses the Spanning Tree Algo-
rithm (IEEE 802.1d-ISO/IEC10038), which provides a loop-free topology
and redundancy.
Server
10 BT
1
O
SDSL
OFF
ON
EIA23210 BASE TPOWER
1 2 3 4
TO
HUB
TO
NIC
Hub
TD
EXPRESS L1.5
RD B1 B2 PWR
LINE
TEST
L768/L1.5
Up to 8 kft