| 56 kbps (56 kilobits per second) The data capacity of a normal single channel digital telephone channel in North America. The figure is derived from the of 4 kHz allocated for such a channel and the 16-bit encoding (4000 times 16 = 64000) used to change signals to digital, minus the 8000 bit/s used for signalling and supervision. At the end of 1997 there were two rival designs capable of this rate: and ' . In February 1998 the proposed a 56kbps standard called {V.90}, which is expected to be formally approved during September 1998. (1998-09-15) |
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