Method, device and system for resolving frame collision in facsimile process

Abstract

The present invention discloses a frame collision method,which contains through end to end facsimile terminal intermediate treatment device realize frame collision detecting, transmitting and retransmission process, thereby realizing facsimile terminal frame interaction. The present invention also includes frame collision detective intermediate treatment device and facsimile communication system. The present invention can optimize frame processing mode, parameter configuration avoiding frame collision resulting to facsimile service failing, raising facsimile service success rate.

Description

technical field [0001] The invention relates to the field of communication, in particular to the field of facsimile communication business. Background technique [0002] Fax service is a basic telecommunication service widely used. The fax communication process stipulated in the T.30 protocol of fax is as follows: figure 1 As shown in the figure, it includes five processes of call establishment, message pre-processing, message process, message post-processing and call release. [0003] Phase A: The call is established, the two parties on the call are connected through the transmission line, and the fax machine is connected to the line. [0004] Phase B: Message pre-processing, that is, the preparation stage before message transmission, including identification and selection of facsimile machine functions, establishment of transmission mode, phase verification, quality test of sending lines, etc. When the receiving party determines that it can be received, it sends a confi...

AI Technical Summary

Problems solved by technology

The fax can only be known when it is sent to the called party, and there is no sending confirmation during the sending process

(2) The scope of application is small

The store-and-forward method can only send fax files generated by PCs, but in fact 90% of faxes are sent through ordinary fax terminals

(3) The processing information is carried out in a manner similar to e-mail, and the fax is not real-time, and the fax service cannot be completed during a call

Therefore, the end-to-end timing requirements in the T.30 fax protocol must be met. This solution cannot effectively solve the timing relationship of frame processing in a network with a large delay, that is to say, it still cannot effectively solve the problem of frame collision in the fax process.

[0020] In the actual use of fax, if the frame processing process cannot be dynamically adjusted during a call, the frame collision problem caused by network delay cannot be solved, which will affect the success rate of the fax service

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