Brother FAX-1820C - Manual (Page 23)

INTRODUCTION 1 - 9
Connecting the machine
Connecting an external telephone
If your machine does not have a handset, you can connect a
separate telephone (or telephone answering device) directly to your
machine as shown in the diagram below.
When this phone (or TAD) is in use, the LCD shows Telephone .
Extension
Telephone
External
Telephone
(MFC-3220C)
(Example for the U.K.)