DSL ADSL SDSL VDSL
DSL vs ADSL vs SDSL vs VDSL
: ADSl
Asymmetric Digital Subscriber Line ( ) 16 ( ) 2 256 .
: SDSL
Symmetric Subscriber Digital Line (). VPS 1000 SDSL . sdsl
: VDSL
Very-high-bitratnme Digital Subscriber Line service - VDSL ADSL ADSL ADSL DSLM 60 .