Canon imageCLASS MF4270 Basic Operation Manual page 126

4
Press [Hook] or pick up the handset of your external telephone.
If you press [Hook], you can temporarily adjust the monitor tone volume with [
5
Dial the recipient's fax/telephone number.
Make sure to confirm the dial tone before entering a fax/telephone number. If you enter the number
before the dial tone can be heard, the call may not connect, or the wrong number may be dialed.
] and [ ].
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