What Is A Single Pair High Speed Digital Subscriber Line Shdsl

What Does Single-Pair High-Speed Digital Subscriber Line (SHDSL) Mean?

A single-pair high-speed digital subscriber line (SHDSL) is a type of symmetric digital subscriber line (SDSL) that has symmetric upload and download speeds over conventional copper telephone lines, which is faster than what a conventional voiceband modem can provide. SHDSL uses trellis-coded pulse-amplitude modulation (TC-PAM) that operates at frequencies that encompass those used by analog voice POTS (plain old telephone service), meaning that a DSL splitter or frequency splitter cannot separate analog voice and data.

Techopedia Explains Single-Pair High-Speed Digital Subscriber Line (SHDSL)

Single-pair high-speed digital subscriber lines allow for symmetrical data rates for both up and down streams, which range from 192 Kbps to 2312 Kbps in 8 Kbps speed increments for single pairs and 384 Kbps to 4624 Kbps in double pair mode. SHDSL is also spectrally compatible with other DSL technologies by using TC-PAM coding, allowing for the use of the technologies in parallel.