Panasonic EB-TX220 - Manual (Page 68)

Chapter 6
56 Advanced Operations
DTMF Tone Length
The tone you hear when you press a key on your keypad is
called a “DTMF” tone. Most phone services and answering
machines require the phone to transmit this tone when a digit
key is pressed. This menu setting allows you to shorten or
lengthen the time the tone is emitted. DTMF tones are
transmitted even when key tones are turned off.
1 From standby, press (MENU) to enter the Main Menu.
2 Press to scroll to Phone Settings. Press (OK).
3 Press to scroll to DTMF Duration. Press (OK).
• The current setting is displayed with an asterisk ( ).
4 To change the DTMF setting, scroll to the other option. Press
(OK).
• The display confirms the DTMF duration setting.
5 Press any key or wait 3 seconds to return to standby.