Abstract: This paper describes different methods of calling subscriber number sending over Internet. The first method uses the coding of signal samples by A-law of compression. In the second one, each bit of this signal is expressed as the telephony event code according to the standardized way of Internet event code presentation. The third one is the new, original method, where the telephony event code presents the whole signal of caller identification. These three methods are compared according to the channel capacity and according to the error probability for the signal sending over Internet.
Keywords: Caller identification, internet, telephony code event, ringing signal, error probability.