One touch dial or speed dialling.

To Set speed dial numbers do the following:
1. In Menu mode, select Phonebook.
2. Select a contact to assign.
3. Select More -> Add to speed dial.
4. Select a number (if necessary).
5. Select a speed dial number you want to set.
The contact is saved to the speed dial number.

Note:
• You can call this contact by touching and
holding the assigned speed dial number in
the dialling screen.
• The first 3 speed dial numbers will be
assigned to the top 3 list on the widget toolbar.

You can't cancel this speed dial, it is fixed for voicemail.
Just go to voicemail number option and remove this number.

Storing Speed Dial Numbers
1 Press Menu, 2, 3, 2.
2 Enter a three-digit Speed Dial number, and then press Set.
3 Enter a number (up to 20 digits), and then press Set.
4 Enter a name (or leave it blank), and then press Set.
5 Press Stop/Exit.

Changing One Touch and Speed Dial Numbers
If you try to store a One Touch or Speed Dial number in a location where a
number is already stored, the LCD shows the current name stored at that
location, then prompts you to either
1 Press 1 to change the number, or press 2 to exit without changing it.
2 Enter a new number and then press Set.
If you want to erase the number, press Clear when the cursor is to the left of the
digits.
If you want to change a digit, use left arrow or right arrow to position the cursor under the digit
you want to change, then type over it.
3 Follow the directions beginning at Step 4 for Storing One Touch Numbers or
Storing Speed Dial Numbers.

You can download the User Manual from here (temporary link): http://dl.dropbox.com/u/1322442/CANON%20CFX-L4000.pdf

Here is a transcript:

Storing Numbers for One-Touch Speed Dialing

Your Canon fax can store up to 120 phone numbers: up to 20 of your most frequently used numbers can be stored for One-Touch Speed dialing, and an additional 100 numbers can be stored for Coded Speed Dialing.

1. Press SET and DATA REGISTRATION

The display will show:

DATA REGISTRATION

1. SPEED DIAL SETUP

2. Press SET twice.

The display will show:

1-TOUCH SPD DIAL

01

3. Use the search buttons (up and down symbols) to select a One-Touch Speed Dialing button between 01 and 20.

The display will show:

1-TOUCH SPD DIAL

[1...7]

??¢ You can also do this by pressing FUNCTION, then pressing the One-Touch Speed Dialing button, then pressing FUNCTION again.

??¢ If a number is already stored at the button you select, that number appears.

??¢ If the button you select is registered for Group Dialing, GROUP DIAL appears.

4. Press SET twice. Use the numeric buttons to enter the fax number you want to store.

The display will show:

TELEPHONE NUMBER

TEL =

??¢ Press SPACE to enter spaces between numbers. (Spaces are optional and are ignored during dialing.)

??¢ If you want to clear a number or a mistaken entry, press CLEAR.

??¢ To enter a pause in the number, press PAUSE one or more times

You can download the User Manual from here (temporary link): http://dl.dropbox.com/u/1322442/CANON%20CFX-L4000.pdf

Here is a transcript:

Storing Numbers for One-Touch Speed Dialing

Your Canon fax can store up to 120 phone numbers: up to 20 of your most frequently used numbers can be stored for One-Touch Speed dialing, and an additional 100 numbers can be stored for Coded Speed Dialing.

1. Press SET and DATA REGISTRATION

The display will show:

DATA REGISTRATION

1 .SPEED DIAL SETUP

2. Press SET twice.

The display will show:

1-TOUCH SPD DIAL

01

3. Use the search buttons (up and down symbols) to select a One-Touch Speed Dialing button between 01 and 20.

The display will show:

1-TOUCH SPD DIAL

[1...7]

??¢ You can also do this by pressing FUNCTION, then pressing the One-Touch Speed Dialing button, then pressing FUNCTION again.

??¢ If a number is already stored at the button you select, that number appears.

??¢ If the button you select is registered for Group Dialing, GROUP DIAL appears.

4. Press SET twice. Use the numeric buttons to enter the fax number you want to store.

The display will show:

TELEPHONE NUMBER

TEL =

??¢ Press SPACE to enter spaces between numbers. (Spaces are optional and are ignored during dialing.)

??¢ If you want to clear a number or a mistaken entry, press CLEAR.

??¢ To enter a pause in the number, press PAUSE one or more times

You can download the User Manual from here (temporary link): http://dl.dropbox.com/u/1322442/CANON CFX-L4000.pdf

Here is a transcript:

Storing Numbers for One-Touch Speed Dialing

Your Canon fax can store up to 120 phone numbers: up to 20 of your most frequently used numbers can be stored for One-Touch Speed dialing, and an additional 100 numbers can be stored for Coded Speed Dialing.

1. Press SET and DATA REGISTRATION

The display will show:

DATA REGISTRATION

1 .SPEED DIAL SETUP

2. Press SET twice.

The display will show:

1-TOUCH SPD DIAL

01

3. Use the search buttons (up and down symbols) to select a One-Touch Speed Dialing button between 01 and 20.

The display will show:

1-TOUCH SPD DIAL

[1...7]

• You can also do this by pressing FUNCTION, then pressing the One-Touch Speed Dialing button, then pressing FUNCTION again.

• If a number is already stored at the button you select, that number appears.

• If the button you select is registered for Group Dialing, GROUP DIAL appears.

4. Press SET twice. Use the numeric buttons to enter the fax number you want to store.

The display will show:

TELEPHONE NUMBER

TEL =

• Press SPACE to enter spaces between numbers. (Spaces are optional and are ignored during dialing.)

• If you want to clear a number or a mistaken entry, press CLEAR.

• To enter a pause in the number, press PAUSE one or more times

You should be able to reassign the speed dials if you want to by going to settings/ speed dials.

Just figured this out (though a lot of people seem to have tried giving an answer without seeing if it works.
Setting speed dial numbers doesn't allow you to choose one for the voice mailbox. Go to Messages -> Voice Mailbox Number (option 12). There you can change the number.

hi,
1.Take your phone 2.Click menu 3.Go to contacts by scrolling down 4.Go to speed dial
There we can assign the number as speed dial.

Press Menu, select Contacts and Speed dials. Select the key you want,
( to ) and press Assign. Select whether you want to assign to call or to
SMS. Select the name you want and press Select.
After the phone number has been assigned to a number key, you can speed dial
the number in the following ways:
• Press the corresponding number key and then press Call, or
• If Speed dialling is set to "on", press and hold the corresponding number key
until the call is started