Ericsson DT59C - Manual (Page 34)

Outgoing Calls
DT590 34
Handsfree
While you are waiting for a connection, dial tone or during the call: ¼
Press.
You are connected to the caller via the loudspeaker and
microphone. The Loudspeaking icon is shown in the display.
End the call
Ъ Щ
Press.
The display shows the duration of the call.
Number Presentation Restriction
If you do not want your name and number to be displayed to the
person you are calling, use the following procedure.
Notes:
This function might be blocked for use on your extension
(programmed by your system administrator).
The Number Presentation Restriction is only valid for the
ongoing call, i.e. the procedure has to be repeated the next
time you want to use it. *42# Ь Ы
Dial and wait for a new dial tone.
¿
Dial the number.
Instead of your name and number, the display on the called phone
shows Anonymous.