ITU-T Fax Standards

ITU V.17 and V.33

The algorithm implemented is the ITU-T V.17 modem recommendation for use in Group 3 facsimile. This transmits data at rates of up to 14 000 bps. This software will operate under the T.30 and T.4 protocols, using V.27ter. A complete software package will include an 8/9.6kHz sample interpolator to enable modem operation over ISDN or other applications that require 8kHz sampling.

V.17 and V.33 are Half-Duplex, leased line, 4 to 128 point Quadrature Amplitude Modulated (QAM) modems, with 2-dimensional, 8-state Trellis encoding. Both high and low channels operate at a bit rate of 2,400 symbols per second, on a carrier frequency of 1,800Hz.

This product has been developed and shipped by SIGNALS+SOFTWARE on a number of platforms previously, both standalone and as part of a complete solution, and would be available customized to meet specific requirements.

For more information please contact our sales team.

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