Application of FSk technique in public telephone terminal of intelligent network

A public telephone and intelligent network technology, applied in the direction of telephone communication, electrical components, frequency modulation carrier system, etc., can solve the problems affecting the popularization and promotion of public telephones with intelligent network IC cards, and achieve the effect of promoting

Inactive Publication Date: 2003-11-12
上海福来得实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seriously affected the popularization and promotion of smart network IC card public telephones

Method used

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  • Application of FSk technique in public telephone terminal of intelligent network
  • Application of FSk technique in public telephone terminal of intelligent network
  • Application of FSk technique in public telephone terminal of intelligent network

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] Please refer to the attached figure 1 , 2 As shown, the currently used interactive mode between the intelligent network platform and the telephone terminal equipment is to use the DTMF (dual tone multi-frequency) interactive mode. Generally, the HT9170 chip is used to communicate according to the DTMF interactive protocol. Every time a bit of data is sent, it takes 40 minutes to wait. -80 milliseconds, can not send data continuously, the utility model adopts chip cmx868, communicates with FSK interactive mode and the interactive process of FSK, accompanying drawing 3 is the circuit diagram of chip cmx868, and its circuit composition and its work process are: when RXAN leads When the pin receives the DTMF or FSK signal on the call line, it first asks the CPU whether it needs to accept this signal, if not, discard this information packet, if accepted, cmx868 receives the information through the RXAN pin, and performs modulation and demodulation, Then first request an int...

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Abstract

The invention is an interaction mode between the public telephone terminal and the platform of intelligent network, which adopts FSK mode whose modulation type is logical 1=1200 Hz, logical 0-2200Hz, the circuit adopts CmX868 chip to realize the interaction agreenment. Because of the support by FSK, the data is sent in continuous no-space state, the speed is increased by nearly 10 times, which can shorten the time to be waited by users within 3 seconds.

Description

technical field [0001] The invention relates to a device for applying FSK technology in an intelligent network public telephone terminal, which belongs to the field of communication. Background technique [0002] The development of intelligent network public telephone is very rapid. Compared with the IC card telephone with the largest installed capacity at present, it has the following advantages: because its authentication, authorization, management, billing, fault handling and other functions are moved to the intelligent public telephone platform, its centralized management mode completely solves the problem of fraudulent calls Problem; can provide users with more convenient and reliable public telephone services; IC cards can be reused, greatly reducing the cost of card issuance; terminal telephones do not need to be settled, so the structure is simple, and the manufacturing cost and maintenance and repair costs are greatly reduced. reduce. [0003] However, since a ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/10H04M11/00
Inventor 邱静岳贾怀友
Owner 上海福来得实业有限公司
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