Error-free Group 3 facsimile terminal for cellular mobile telephone circuit

A Group 3 error-free facsimile terminal developed for use in the cellular radio network is described. The terminal uses a CCITT V.27ter modem with eight-phase differential phase-shift keying (DPSK) modulation and an adaptive error control scheme developed for mobile telephone communication. An image data compression uses modified modified READ (MMR). The data transmission speed is 4800 b/s. The terminal can transmit a letter-size document (of the CCITT No. 1 chart) in 25 s.<
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