Canon B150 - Manual (Page 134)

TONE
A button that allows you to temporarily switch
to touch-tone from pulse dialling. In some
countries, on-line data services may require
that you use tone dialling.
TTI
Transmit Terminal ID. See Sender ID.
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U
Unidirectional printing
Printing in one direction only, left to right.
This printing method on the fax provides a
higher image quality but slower print speed.
See also Bi-directional printing.
Glossary
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