June 22, 1999
ITU G.992.1 ADSL standard approved
ITU-T approved Recommendation G.992.1 on June 22, 1999 — the asymmetric digital subscriber line (ADSL) transceiver standard for megabit speeds over copper phone pairs.
What it was for
ADSL let telcos reuse existing twisted-pair plant to compete with cable — always-on downstream-heavy links for web browsing and early video. G.992.1 (G.dmt) defined how modems split voice and data on one line, enabling mass consumer DSL services and remote work outside cable-franchise cities.
Why it's here
G.992.1 standardized the DSL technology that brought broadband to millions of phone-line-only homes.
Why it mattered
It gave developers a second mass-market always-on access path beside cable DOCSIS.
What it solved
telephoneVoice communication over wired or wireless networks — the dominant real-time medium before the internet. incumbents needed a standards-based way to offer internet without replacing every copper loop.
Related
- DOCSIS 1.0 cable modem standard releasedMarch 1997
- @Home launches residential cable internetSeptember 1996