Aastra Telecom dt690 Manual De Usuario

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1424-EN/LZT 103 088 Uen D3 2010-11-16
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12.11 
Dialing During a Connected Call
When calling interactive teleservices, such as phone banks, you need to 
use Dual Tone Multi Frequency (DTMF) signals. If the phone exchange 
is not already programmed to automatically convert entered digits into 
DTMF signals, this function needs to be activated during the call.
To dial digits during a connected call, do the following:
1.
Press 9.
Note:  In Finland, press 1.
2.
Dial the required digits. 
The entered digits are transferred as DTMF signals.
OR
1.
Press More, select DTMF and press Select.
2.
Dial the required digits. 
The entered digits are transferred as DTMF signals.