Canon ImageClass MF 4270 Operation Manual page 110

4
Press [Hook] or pick up the optional handset or 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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