Ericsson Dialog 3210 - Dialling During a Connected Call

During Calls
Dialog 3210, 3211 and 321220
Dialling during a connected call
When calling interactive tele services, e.g. telephone banks, you
need to use Dual Tone Multi Frequency (DTMF) signals. If your
exchange is not already programmed to automatically convert your
entered digits into DTMF signals, you need to activate the function
during the call.
During an ongoing call:
9 z Press and dial the requested digits
Entered digits are transferred as DTMF signals.
Note: Finland press
1 and dial the required digits.