Specifications

COPYRIGHT
©
1999 CANON INC. CANON SUPER G3 FAX BOARD-F1 REV.0 MAY 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
2-55
CHAPTER 2 OPERATION AND TIMING
D. V.8/V.34 Procedure
Reductions have been made to the image transmission time using a V.34 standard modem
complying with ITU-T (maximum transmission speed of 33600 bps).
1. V.8 Procedure
The V.8 procedure starts a communication as if the type of device (existing modem, fax, V-
series modem) is not a factor. (See Figure 2-401.)
n Receiving Modem Not Provided with V.8
The normal modem connection sequence will be executed.
n Receiving Modem Provided with V.8
The appropriate modulation method from among the following will be selected and
executed. If both transmitting and receiving devices declare V.34, a switch-over is made to
V.34. (Execution of V.34 requires execution of the V.8 procedure.)
Possible Modulation Methods
1. V.21
2. V.27ter
3. V29 half duplex, G3FAX, T30, etc.
4. V.17
5. V.32bis or V.32
6. V.34 half duplex, V.34 full duplex
Figure 2-413 V.8 Starting Procedure
Callee Supporting V.8
Callee Not Supporting V.8
V.8 answer
tone
Communicates
possible modula-
tion methods
Communicates
possible modula-
tion methods
Answer tone
V.34 procedure
Normal procedure
Caller
Callee
Caller
Callee