1 for call to tool operator.
2 for service operator
3 to finish this call, etc.
To accomplish this, see the TelephonyConversation object's sendDTMF() method. You will need to provide a mechanism for user input in your web page - i.e. a graphic keypad and/or by capturing key strokes - then use the sendDTMF() method to pass those numbers on to the call.
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