Canon imageCLASS MF7470 Manual

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What Can I Do with This Machine?
Super G3
Super G3 is a phrase used to describe the new generation of fax 
machines that use ITU‑T V.34 standard 33.6 Kbps* modems. Super G3 
High Speed Fax machines allow transmission times of approximately 3 
seconds* per page which results in reduced telephone line charges.
Approximately 3 seconds per page fax transmission time based on 
CCITT/ITU‑T No.1 Chart, (JBIG, Standard Mode) at 33.6 Kbps modem 
speed. The PSTN (Public Switched Telephone Network) currently 
supports 28.8 Kbps modem speeds or slower, depending on 
telephone line conditions.
*