SDSL

SDSL Symmetric DSL

symmetric line

SDSL Single-Line Digital Subscriber Line

Digital Line

symmetric transmission-line

pair-wise symmetric

symmetric

SDSL Single-Line Digital Subscriber Line，Single-Line DSL

digital technology

digital drift-phase technology

technology line

symmetric method

Symmetric Digital Subscriber Line

Digital Control Technology

symmetric trans-dimensional structure

Symmetric data

symmetric function

symmetric information