ما هو ال dsl ؟ ما هو ال Adsl ؟ ما هو ال Hdsl ؟ ما هو ال Vdsl ؟ ما هو ال Sdsl ؟

[Tech_Man]

Theses are the DSL types and some information about each type

ADSL
Asymmetric Digital Subscriber Line,Up to 8 Mbps downstream;
Up to 1 Mbps upstream,Used for Internet and Web access, motion video, video on demand, remote LAN access

G.Lite
Splitterless DSL,Up to 1.5 Mbps downstream;
Up to 0.5 Mbps upstream. 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,1.544/2.048 Mbps duplex on two twisted-pair lines, known as T1/E1 service between server and phone company or within a company;
WAN, LAN extension, server access

SDSL.
Symmetric DSL,1.544 / 2.048 Mbps on a single duplex line downstream and upstream,Same as for HDSL but requiring only one line of twisted-pair

VDSL
Very high bit-rate Digital Subscriber Line,12.9 to 52.8 Mbps downstream;
1.5 to 2.3 Mbps upstream;
1.6 Mbps to 2.3 Mbps downstream,ATM networks;
Fiber to the Neighborhood