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 0to 9, *and #. You can also attach a DTMF sequence to a phone number before dialling it (or storing it in the Phonebook). 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 w for a wait and p for a pause. The phone always interprets the first pause character as a 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.
Access 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: 12345678w8421p3.
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.
Make 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).
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