Nordic Star Products MFC-3420C - Manual (Page 27)

INTRODUCTION 1 - 11
When the TAD is in use, the LCD shows Telephone .
If you do not receive all your faxes, reduce the Ring Delay
setting on your external TAD.
Unless you are using Distinctive Ring, do not connect a
TAD elsewhere on the same phone line.
TAD
TAD
(Example for the U.K.)