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Chapter 2: Network Planning
Introduction to Switching
A network switch allows simultaneous transmission of multiple packets via
non-crossbar switching. This means that it can partition a network more efficiently
than bridges or routers. The switch has, therefore, been recognized as one of the
most important building blocks for today’s networking technology.
When performance bottlenecks are caused by congestion at the network access
point (such as the network card for a high-volume file server), the device
experiencing congestion (server or power user) can be attached directly to a
switched port. And, by using full-duplex mode, the bandwidth to the end-user can be
doubled to maximize throughput.
A switch can be easily configured in any Ethernet network to significantly boost
bandwidth while using conventional cabling and network cards.
Sample Applications
VDSL provides significant savings on network installation, equipment and service
fees. Internet services operate over existing phone cabling and a minimal amount of
network equipment. The only changes require installing an ES2002-TS CPE for
each client, and a VDSL Switch-VS2512A and VDSL Splitter-VM2524 in the
basement or
wiring closet. Internet service can then be provided over a direct
Ethernet connectio
n to your ISP. For non-commercial environments, you can run the
switch through a broadband router at the customer’s site. This will allow you to use a
single-user account and ISP sharing to significantly reduce network access charges.
Accton’s VDSL Switch-VS2512A provides Internet connections of up to 15 Mbps, full
duplex, for multiple users. Cable distances also can run up to 1525 meters (at lower
transmission rates). VDSL installation is extremely economical for multiple-tenant
dwellings such as apartment buildings, hotels or school dormitories, as well as
commercial buildings.
VDSL provides multiple-user access to the Internet with benefits including:
• Internet services such as e-mail over faster connections than currently possible
with other options such as cable modem or ADSL
• Multimedia applications such as video and virtual gaming made available to the
broader public for the first time
• Access to corporate intranets at speeds close to that available in the office
Both local network applications and Internet services are supported for commercial
environments.