Telephone/Fax Processing Unit

A processing device and facsimile technology, which is applied in the direction of telephone communication, interconnection device, digital voice transmission telephone, etc., can solve the problems of low channel utilization, large redundancy, and security that cannot meet military communication.

Active Publication Date: 2013-07-24
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Foreign TDMA satellite communication terminals do not provide user-oriented telephone / fax access methods, and usually require additional multiplexing equipment. IP data or frame relay communication protocols are used between this equipment and TDMA satellite communication terminals, and its security cannot meet military requirements. Communication requirements, and the disadvantages of excessive redundancy and low channel utilization

Method used

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  • Telephone/Fax Processing Unit
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Examples

Experimental program
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Embodiment Construction

[0013] refer to Figure 1 to Figure 2 , the present invention includes user relay interface 101, user relay interface 102, user relay interface 103, user relay interface 104, echo cancellation 105, echo cancellation 106, echo cancellation 107, echo cancellation 108, voice / Fax processing unit 110 , SRAM 111 , protocol processing and framing and deframing unit 109 , and level conversion module 112 . figure 1 It is the electric principle block diagram of the embodiment of the present invention, and the embodiment is according to figure 1 Wiring lines. Among them, the user trunk interface 101, the user trunk interface 102, the user trunk interface 103, and the user trunk interface 104 have exactly the same functions. Loop constant current feed, off-hook detection, ringing current relay drive, ringing current automatic cutoff, ringing current detection, polarity detection, analog off-hook and PCM codec, etc., the embodiment is made by commercially available user relay interface ...

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Abstract

The invention discloses a telephone / fax processing device, which relates to a telephone / fax access processing device in the field of TDMA satellite communication. It consists of user relay interface, echo cancellation, voice / fax processing unit, SRAM, protocol processing and framing and deframing unit, level conversion and other components. The design fully considers the characteristics of the TDMA military satellite communication system. The invention fully considers the short-time communication interruption, channel utilization rate, security and other issues, and adopts the protocol processing and framing and deframing unit to support four-way telephone or fax service access , adopts a custom frame structure, provides an independent protocol processing method, has high security, and provides a user-oriented application method for the device. It has the characteristics of high voice quality, strong real-time fax, adaptable to long delay, allowing channel interruption and good security, etc. It is especially suitable for TDMA satellite communication system as a telephone / fax service terminal.

Description

technical field [0001] The invention relates to a telephone / fax processing board in the field of TDMA satellite communication terminals, and is especially suitable for use as a telephone / fax service terminal in a TDMA satellite communication system. Background technique [0002] Foreign TDMA satellite communication terminals do not provide user-oriented telephone / fax access methods, and usually require additional multiplexing equipment. IP data or frame relay communication protocols are used between this equipment and TDMA satellite communication terminals, and its security cannot meet military requirements. The communication requirements, and the redundancy is too large, the channel utilization rate is low and other shortcomings. Contents of the invention [0003] The object of the present invention is to avoid the disadvantages of the above-mentioned background technology and provide a telephone / fax processing device which has an independent protocol processing mode, hig...

Claims

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Application Information

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IPC IPC(8): H04M1/253H04M7/00
Inventor 徐学梅程卫钟浩张江伟
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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