Abstract:

FOIP technology and standards are discussed,and the realization manner of real-time IP fax solution is presented in this paper.Due to the inherent characteristics of IP networks,IP Fax must overcome such technical problems as delay variation,jitter,packet loss and error correction.T.38 fax gateway must pass.T.38 Fax Gateway demodulates received faxes from the fax machine into the T.30 control message signal demodulation and fax image data,information and data on these re-packaged into IFP packets,through the IP network to the T.38 IFP packets receiving gateway,and the gateway to the T.30 control messages received and graphic data re-modulation,which is then sent to the receiving fax machine.Good performance is achieved which is comparable to that of the PSTN network fax.

Key words: fax over IP;T.30;T.38