Recommendation G.992.1 (06/99) i
ITU-T RECOMMENDATION G.992.1
ASYMMETRIC DIGITAL SUBSCRIBER LINE (ADSL) TRANSCEIVERS
Summary
This Recommendation describes Asymmetric Digital Subscriber Line (ADSL) Transceivers on a
metallic twisted pair that allows high-speed data transmission between the network operator end
(ATU-C) and the customer end (ATU-R). This Recommendation provides a variety of bearer
channels in conjunction with one of three other services dependent on the environment:
1) ADSL transmission simultaneously on the same pair with voice (band) service;
2) ADSL transmission simultaneously on the same pair with G.961 (Appendix I or II) ISDN services; or
3) ADSL transmission on the same pair with voiceband transmission and with TCM-ISDN (G.961 Appendix III) in an adjacent pair.