ITU-T Fax Standards

ITU V.27ter

The algorithm implemented is the ITU-T V.27ter modem recommendation for use in Group 3 facsimile. This transmits data at rates of up to 4 800 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.27ter is a Half-Duplex, leased line, Quadrature Phase Shift Keyed (QPSK) modem operating on a 1,800Hz carrier frequency, at symbol rates of 1,200 and 1,600 symbols per second for respective data rates, 2 400 bps and 4 800 bps. V.27ter also includes a 75 bps backwards channel.

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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