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Query a voice server, voice mailbox, messaging
service, etc. (DTMF tones)
Some phone services (such as phone answering machines and pagers) require your
phone to transmit DTMF tones (Dual Tone MultiFrequency), also known as "touch
tones". These are used to communicate passwords, callback numbers, caller
choices, and so on.
You can send DTMF tones at any time during a call by pressing any of the keys 0
to 9, * and #. You can also append a DTMF sequence to a phone number
before dialling it (or storing it in the Names list). The phone number and the DTMF
part must be separated by a wait character.
Pause and wait characters
To obtain a pause or wait character, press and hold #. The display shows
a wait and
wait character. When you dial a number containing a wait character, your phone
dials the first part (the phone number) and then waits for the call to be connected
before sending the rest of the digits as DTMF tones. Any subsequent pause
character is an ordinary pause that generates a delay of 2.5 seconds.
Interrogating your answering machine (example)
To hear all messages (e.g. code 3) on your answering machine (password 8421) at
phone number 12345678, you could call:
The phone dials 12345678 and waits for the call to be connected. When connected,
the phone transmits 8421 (the password), pauses 2.5 seconds, and then sends the
last digit. If you find that 2.5 seconds is not long enough for your needs, you can
enter several pause characters one after the other to increase the pause time.
Making a second call
You can make a second call during an active call or during a call on hold. You
can switch between the two calls (the cost displayed on the screen depends
on local charge rate).
While already on the phone, dial a number then press (. The first call is
1
placed on hold and the number is displayed at the bottom of the screen. The
second number is then dialled.
54
p
for a pause. The phone always interprets the first pause character as a
12345678w8421p3.
Other
operator
services
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