Canon fax basic 2000 サービスマニュアル

5–103

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G3 FACSIMILE COMMUNICATIONS

by DCS. Delaying the transmission speed in this way when a communica-

tions error has occurred at the current transmission speed is called “fall-

back.” When FTT is returned (when TCF cannot be successfully received)

even if fallback is repeated, the transmitting side judges that communica-

tions is not possible on the current line, and the communications ends in

error.

Fig. 5-75 Training

FTT

TCF

DCS

CNG

DIS

CED

RTC

EOP

MCF

DCN

At FTT

Dial

Call

Response

Calling Side (transmitter)

Called Side (receiver)

Training

Message

At CFR

Line disconnected

(CFR)