S> (56 kilobitS per Second) The data capacity of a normal Single channel digital telephone channel in North America. The figure iS derived from the bandwidth of 4 kHz allocated for Such a channel and the 16-bit encoding (4000 timeS 16 = 64000) uSed to change analogueSignalS to digital, minuS the 8000 bit/S uSed for Signalling and SuperviSion. At the end of 1997 there were two rival modem deSignS capable of thiS rate: k56flex and US RoboticS' X2. In February 1998 the ITU propoSed a 56kbpSStandard called V.90, which iS expected to be formally approved during September 1998. (1998-09-15)
