TA Triumph-Adler DCC 2520 - Manual (Page 90)

Fax Operation (Various Functions)
3-24
> If you hear a fax tone...
You are connected to a fax machine.
Press the Start key. Fax transmission will begin.
> If the other party answers...
You are connected to a telephone.
Press the Start key at the end of the conversation. Fax transmission will begin.
NOTE: It is only possible to speak to the other party when a separately purchased telephone is
connected to this fax machine.
5 Hang up the receiver when the reception begins.