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ISDN G4 Board D-1

Appendix D

ISDN G4 Board

The ISDN G4 Board is an optional package which enables your machine

to function as a digital facsimile transceiver conforming to Group 4 ITU-

T recommendations. It is equipped with an automatic fallback feature that

enables the machine to communicate in G3 mode when its G4 signal is

rejected or a G3 signal is received.

Main Specifications

Network compatibility ISDN, Circuit switch mode

(PSTN not available when activated)

Network interface ITU-TI.430, ETS 300 012.

Basic rate interface (2B+D),

S/T interface, RJ45

G3 mode

Compatibility ITU-T G3(auto-fallback G4

→

G3)

Transmission speed 33.6kbps max.

Coding scheme MH, MR, MMR

(JBIG for Model B only)

Resolution 8 dots x 3.85lines/mm

8 dots x 7.7lines/mm

8 dots x 15.4lines/mm

300 x 300 dots/inch

Transmission time 2.5sec

(ITU-T No.1 chart,33.6kbit/s,

JBIG, 8 dots × 3.85lines/mm)

Error correction ECM, page retransmission with redial

CODEC ITU-T G.71

(auto-select by country code)

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Oki 5700 Manual do Utilizador Página 123