Philips D721 Telephone User Manual


 
3.3.8 Switching the microphone on/off (muting)
Switch off the microphone if you want to talk to somebody in the room
during a telephone conversation without wanting your telephone partner to
listen in.
Initial state:
conversation
Steps:
No. Description Input Display
3.3.9 DTMF/keypad signalling
You can use dual tone multifrequency (DTMF) or the keypad method to
control called computers. When you use the DTMF method, coded tones
are sent and, when you use the keypad method, coded digital signals are
sent. The method you choose depends on the chosen computer. Once you
have sent the complete telephone number, or after establishment of a
connection to an incoming call, the telephone switches over automatically
to DTMF.
Initial state:
conversation
Steps:
No. Description Input Display
In the example, the telephone number 1234 has been dialled, followed by
the transmission of 4711 as keypad data and 4712 as DTMF data.
1234-K4711M4712§
ŋǤ‰ ÏÌÓÛı
s ±
Switching between
DTMF digits and
keypad signals
1
043188180
043188180
ŋǤ‰ ÏÌ ÓÛı
s ¢
Switch the handset
and hands free
microphone on or off
1
043188180
043188180
ŋǤÏÌÓÛı
If necessary, press
o several times to
store the modified
setting
The volume can be
altered in nine steps
2
33