Canon Color imageCLASS MF8050Cn Starter Manual page 16

4.
Change the line type.
By default, the telephone line type on the machine is set to tone dialing. If you use tone dialing, skip the following procedure.
If you use pulse dialing, follow the procedure below and change the telephone line type setting on the machine to pulse
dialing.
If you do not know the type of telephone line you use, contact your local telephone company.
Press [ ] (Menu).
Select <Send/Receive Settings> with [
Select <Fax Settings> with [
Select <Basic Settings> with [
Select <Select Line Type> with [
Select the line type you are using with [
<Tone>: Tone dialing (Default)
<Dial 10 PPS>: Pulse dialing
Press [ ] (Menu) to close the menu screen.
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] or [ ], and then press [OK].
] or [ ], and then press [OK].
] or [ ], and then press [OK].
] or [ ], and then press [OK].
] or [ ], and then press [OK].