Frequency allocation networking of urban line telephone network

A frequency distribution and wired telephone technology, applied in telephone communication, electrical components, data exchange network, etc., can solve the problems that affect the transformation process of digital communication technology, it is difficult to support communication functions, and it is difficult to cut over and maintain, so as to prevent power failure Consumption, low cost, low cost effect

Inactive Publication Date: 2005-01-19
王亦兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main shortcomings of this traditional transmission method are large line investment, high traffic cost, limited transmission distance, and the disadvantages of difficulty and high cost in cutover maintenance.
In addition, with the rapid development of modern digital communication technology, if the technical innovation of the existing wired telephone network is not carried out in time, it will definitely affect the transformation process of digital communication technology, and it will not be easy to support other communication functions

Method used

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  • Frequency allocation networking of urban line telephone network
  • Frequency allocation networking of urban line telephone network
  • Frequency allocation networking of urban line telephone network

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with embodiment (accompanying drawing):

[0023] Such as figure 1 As shown, the wired telephone local telephone network frequency distribution network of the present invention includes interface devices respectively arranged at the user end and the center end, and transmission circuits II', II connected between the user end and the center end interface devices; the center interface device includes a central interface circuit V 1-n , modulation circuit I 1-n and frequency selective demodulation circuit III′ 1-n ; Among them, from the user port of the switch via H 1-n Incoming downlink audio signal x 1-n via the interface circuit V 1-n The output terminal is connected to the modulation circuit I 1-n , via the modulation circuit I 1-n Modulate it into a high-frequency modulated downlink signal, and connect it to the transmission circuit II through its output; the uplink modulated signal from the tr...

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PUM

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Abstract

The invention is a wire telephone frequency allocation network, which includes a interface device between the user terminal and the central office, and a transmitting circuit between the user terminal and the center interface device, the central interface device includes a center interface circuit, a modulating circuit and a frequency selecting circuit; the user interface device includes a user interface circuit, a modulating circuit and a frequency selecting and demodulating circuit; the cost is low, one pair can contain several users, the maintenance is easy.

Description

(1) Technical field [0001] The invention relates to the technical field of wired telephones, in particular to a wired telephone local telephone network frequency allocation network. (2) Background technology [0002] The traditional wired telephone local telephone network is connected to each user through the dedicated line from the user port of the switch, and supplies the user's working current and ringing current at the same time. The main disadvantages of this traditional transmission method are large line investment, high traffic cost, limited transmission distance, and the difficulty and high cost of cutover maintenance. In addition, with the rapid development of modern digital communication technology, if the existing wired telephone local telephone network is not technologically innovated in time, it will definitely affect the transformation process of digital communication technology, and it is not easy to support other communication functions. (3) Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/00H04M3/00
Inventor 王亦兵
Owner 王亦兵
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