The current broadband access technologies such as DSL, Cable, WiMax and Satellite can provide similar services to consumers and business. The basic services are data, video, audio and VoIP service. Selecting the right technology depends on cost, easy deployment and speed.


DSL (Digital Subscriber Loop):



There are three kinds of DSL Asymmetric Digital Subscriber Loop ADSL, High bit rate Digital Subscriber Line HDSL and Very high rate Digital Subscriber Line VDSL.  DSL line enters the front end of the telephone company's central office, but does not connect through the regular switch, it is passed on to a network access point

The most mature of the DSL standards is  ADSL. The downstream speed of ADSL depends on the length of the loop; the table below shows the major distance/rate pairings:

Maximum distance  Downstream speed

18,000 feet                1.544 Mbps

12,000 feet                6.312 Mbps

9,000 feet                  8.448 Mbps



The upstream capacity ranges from 16 Kbps to 640 Kbps.

Cable Modem Technology,

It delivers internet access to homes and business over standard cable television coaxial cable. It uses a channel in the cable company's shared bandwidth tree. Internet delivered up to 27 Mbps but service provider companies limit data rate between .5 Mbps and 2.5 Mbps.

VSAT(Very Small Aperture Terminal)

VSAT is used widely today because its availability and service can be deployed anywhere in world. It is also used as backup for disasters recovery because it does not depend on local infrastructure. Its data rates typically range from narrowband up to 4 Mbit/s


WiMax (Worldwide Interoperability for Microwave Access)

It provides broadband wireless access up to 50 km for fixed station and 5 – 15 km for mobile stations. The WiFi also provide wireless access but it is used for local area network. It has limited access to only 30- 100m. WiMax can deliver up to  70 Mbit/s

I recommend wireless broadband because it can cover wide geographic areas. Service can be provided in places where it would be expensive to run wires.  It has les disruption for communities because there is no digging



Last Updated (Tuesday, 13 October 2009 11:32)

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