Yahoo!BB developed individually, G.992.1 AnnexA basedADSLacceleration technology.

Besides the fact thattheerror correcting codeof S=1/2 system is adopted, it rises until recently and to the band of 25.875kHz - 138kHz which have been used for the communication of direction, it descends and being highest due to the fact that also the communication data of direction lets flow, the acceleration of 1Mbps becomes possible. However, it rises and the signal of direction descends and because it interferes to the electric information of direction, transmission speed of rising direction decreases somewhat.

In addition, the zone of 26kHz - 138kHz becomes strong in noise with Annex A impossible long distance communication possible in comparison with the zoneof 138kHz - 1104kHz which presently have been used for descent direction.

Though, as for the based standard of Annex A.ex becauseto the last it isAnnex A,reachable distance and speedare thoughtin comparisonwithC.x and eXtremeDSL which are expansion of the Annex C base, that it is inferior somewhat. ... The continuation is read

At the same Globespan Virata corporation asC.x, the techniqueof AnnexA.ex and the technique of C.x almost it is the same by the way,to mountthe function of Annex A.ex. As for S=1/2 technology it is not includedinC.xstrictly, but becauseas for the provider which adoptsC.xyou adopt also S=1/2, other than the standard which is turned to the originequality you can call Annex A.ex and C.x to actuality almost.