Type tone

Using alpha numeric keyboards or telephone number buttons - to transmit information instantaneously. So that in billing situations, you don't need to to shout out your personal details for 10 minutes. Rather I ought to be able to input and transmit this data with my telephone or PDA keyboard, in a non obtrusive way (no loud tone noise for the receiving party). The info should instantly appear in on their monitor. This sort of exists with automated phone ordering systems, but that's not as seamless as it could be.