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DSL Type |
Description |
Data Rate |
Distance Limit |
Application |
|
IDSL |
ISDN Digital Subscriber Line |
128 Kbps |
18,000 feet on 24 gauge wire |
Similar to the ISDN BRI service but data only (no voice on
the same line) |
|
CDSL |
Consumer DSL |
1 Mbps downstream; less upstream |
18,000 feet on 24 gauge wire |
Splitterless home and small business service; similar to
DSL Lite |
|
DSL Lite (same as G.Lite) |
"Splitterless" DSL without the "truck
roll" |
From 1.544 Mbps to 6 Mbps downstream, depending on the
subscribed service |
18,000 feet on 24 gauge wire |
The standard ADSL; sacrifices speed for not having to
install a splitter at the user's home or business |
|
G.Lite (same as DSL Lite) |
"Splitterless" DSL without the "truck
roll" |
From 1.544 Mbps to 6 Mbps , depending on the subscribed
service |
18,000 feet on 24 gauge wire |
The standard ADSL; sacrifices speed for not having to
install a splitter at the user's home or business |
|
HDSL |
High bit-rate Digital Subscriber Line |
1.544 Mbps duplex on two twisted-pair lines; |
12,000 feet on 24 gauge wire |
T1/E1 service between server and phone company or within a
company; |
|
SDSL |
Symmetric DSL |
1.544 Mbps duplex (U.S. and Canada); 2.048 Mbps (Europe)
on a single duplex line downstream and upstream |
12,000 feet on 24 gauge wire |
Same as for HDSL but requiring only one line of
twisted-pair |
|
ADSL |
Asymmetric Digital Subscriber Line |
1.544 to 6.1 Mbps downstream; |
1.544 Mbps at 18,000 feet; |
Used for Internet and Web access, motion video, video on
demand, remote LAN access |
|
RADSL |
Rate-Adaptive DSL from Westell |
Adapted to the line, 640 Kbps to 2.2 Mbps downstream; 272
Kbps to 1.088 Mbps upstream |
Not provided |
Similar to ADSL |
|
UDSL |
Unidirectional DSL proposed by a company in Europe |
Not known |
Not known |
Similar to HDSL |
|
VDSL |
Very high Digital Subscriber Line |
12.9 to 52.8 Mbps downstream; |
4,500 feet at 12.96 Mbps; |
ATM networks; |