Brother MFC 8220 - Manual (Page 112)

7 - 9 AUTO DIAL NUMBERS AND DIALLING OPTIONS
Telephone (voice) operations
Making a telephone call
1
Pick up the handset of the external phone.
2
When you hear a dial tone, dial the call using the dial pad,
One-Touch, Speed-Dial or Search.
To hang up, replace the handset of the external phone.
Using an external telephone
The easiest way to use your external telephone is to pick up the
handset and dial the number on the external telephone as you
normally would.
1
Pick up the handset of the external telephone.
2
Dial the number.
3
To hang up, replace the handset.