Sending DTMF tones
DTMF (Dual Tone Multi-Frequency) tones are the tones
you hear when you tap the number keys on the numeric
keypad of the Telephone application. For example, DTMF
tones allow you to communicate with voice mailboxes
and computerised telephony systems.
You can send DTMF tones to the network to, for example,
access automated phone services, voice mailboxes, or
banking systems.
You can send DTMF tones automatically if you have added
a DTMF tone to the
DTMF
field in a contact card in
Contacts application. You can also send DTMF tones
manually in the Dialler view of Telephone. The manual
method of transmitting DTMF tones is recommended
when the DTMF tone string is short.
To send DTMF tone strings automatically during a
call, press
, and select
Options
>
Send DTMF...
. If
there is a DTMF string for the currently active call in
Contacts, the
Send DTMF
dialog opens. Tap
Send
to
send the DTMF tone automatically, or
Enter manually
to use the Dialler view. The Dialler view opens
Te
lephone
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automatically if there is no DTMF string for the call in
Contacts.
To enter DTMF tones manually during a call, tap
Dialler
or press .
Enter the DTMF string.
Tip: There are 2 special characters that you can use by
double-tapping * on the keypad:
• p (pause) — Causes a three-second pause
between the digits in a DTMF tone string. All
digits that follow the pause are treated as
DTMF tones.
• w (wait) — Pauses the sending of DTMF digits
until you tap
Send
. The rest of the string is
sent to the network. All digits that follow the
wait are treated as DTMF tones.
You can add DTMF tones to the
DTMF
field in a contact
card.