基于T.38网关的实时IP传真技术设计与实现

摘要

讨论了IP传真技术和IP传真标准,并给出了实时IP传真的实现方案。由于IP网固有的特点决定了IP传真必须解决时延与抖动,丢包与纠错等技术难点。T.38传真网关将从传真机接收到的传真信号解调成T.30控制消息和传真图像数据,对这些消息和数据重新封装成IFP包,通过IP网络将IFP包发送到T.38接收网关,接收网关对T.30控制消息和图形数据再调制,然后发给接收传真机,可获得与PSTN网相媲美的传真质量。%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.