 von Dragon » Mo 31 Jul, 2000 12:32
von Dragon » Mo 31 Jul, 2000 12:32 
			
			Hi smitty
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What is DSL?
DSL (Digital Subscriber Line) uses the current copper infrastructure to supply broadband service access to the Internet. This service requires specialized equipment at the DSL.net location and a DSL modem at the subscriber's location. DSL.net currently offers "SDSL" (symmetric DSL, or in other words, same speeds, both directions) for small- and medium-sized businesses.
   
There are many different types of DSL technologies as illustrated in this comparison chart.
xDSL
 Upstream Bandwidth
 Downstream Bandwidth
 Range (feet)
 Wire Type
 Symmetry
 
SDSL
 144 Kbps to 1.5 Mbps
 144 kbps to 
1.2 Mbps
 8,000 – 18,000
 Single twisted pair
 Symmetric
 
ADSL
 16 Kbps to 640 Kbps
 1.5 Mbps to 9Mbps
 18,000
 Single twisted pair
 Asymmetric
 
RADSL
 Varies within ADSL range
 Varies within ADSL range
 18,000
 Single twisted pair
 Asymmetric
 
VDSL
 1.6 Mbps to 2.3 Mbps
 13 Mbps to 52Mbps
 1,000 – 4,000
 Single twisted pair
 Both
 
IDSL
 128 kbps
 128 kbps
 36,000
 Single twisted pair
 Symmetric
 
DSL—Digital subscriber line.
Upstream bandwidth—Speed data travels from the subscriber to central office.
Downstream bandwidth—Speed data travels from the central office to subscriber.
Range—Maximum distance allowed between central office and subscriber.
Symmetry—Structural or functional independence of direction (Symmetric, same speeds in each direction; Asymmetric, different speeds in each direction).
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Bei ADSL sind maximal 18,000 feet erlaubt !
mfg:
Dragon...--->