CN2165585Y

CN2165585Y - Bridging mutually-dialing telephone

Info

Publication number: CN2165585Y
Application number: CN 93238816
Authority: CN
Inventors: 谢元良
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-04
Filing date: 1993-06-04
Publication date: 1994-05-18
Anticipated expiration: 2003-06-04

Abstract

The utility model relates to an internal line telephone for mutually making phone calls on the same three-core conductive wire. The utility model is composed of a dialing circuit, a decoding circuit, a ringing circuit, a communication circuit, power supply, and a three-core conductive wire which is coupled in bus. The utility model is characterized in that the dialing circuit adopts a digital address encoder; the decoding circuit adopts an address decoder which is matched with the encoder of the dialing circuit; the decoder is provided with the address codes of a telephone; address codes corresponding to the keyboard of the encoder are sent to the decoder by the encoder through a data line, and the decoder compares the received signals with the address codes of the telephone, when the received signals and the address codes of the telephone are same, the ringing circuit can be started to work. The utility model has the advantages of simple structure, large capacity, and low expense of telephone network.

Description

Bridging mutually-dialing telephone

The utility model relates to a kind of communication telephone set, especially for the collinear machine of dialing mutually of interior lines conversation.

Existing interior lines phone will be implemented in to dial mutually on the single line road and all adopt carrier system, and the telephone network cost of equipment of this mode is higher.Also have and adopt multilane to realize the telephone system that the interior lines phone is dialled mutually, as Chinese patent 87207489 described " electronics interior lines automatic telephone system ".This machine is by dial-up circuit, decoding circuit, ringing circuit, speaking circuit, power supply and be connected lead and constitute, its dial-up circuit adopts the integrated ringing circuit of 8024CMOS, decoding circuit adopts the digital type pulse counter, the multicore cable of the two-wire pair twist of the polyethylene insulation of connection lead employing aluminum foil shielded.This telephone system connects the multicore cable that lead needs the two-wire pair twist, corresponding engineering complexity, expense height because its dial-up circuit and decoding circuit are limit, and its capacity is less.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of capacity bigger, connects with a three-core conductor between the telephone network, is specially adapted to the collinear machine of dialing mutually of interior lines conversation.

Solution of the present utility model is: dial-up circuit adopts digital address scrambler, the address decoder that the encoder of decoding circuit employing and dial-up circuit is complementary, make the address code data wire for one in the three-core conductor, make speaking wire for one, also have one and make the ground connection common line.Its operation principle is: during off-hook, speaking circuit is connected, and presses the phone keyboard number that is connected with digital address scrambler, and address scrambler is sent on address code each phone in the telephone network by data wire.During other phone on-hook, address decoder is in running order, when the address decoder receives the address code signal of address scrambler output of arbitrary phone in the telephone network, the signal of receiving is compared with predefined machine address code, after affirmation receives and is this machine address code, to start ringing circuit work, bell signal is sent from loud speaker, and be called out receiver off-book this moment speaking circuit work is conversed.The bus of telephone network of the present utility model also can adopt three-core conductor.

The utility model advantage compared with prior art: because the address decoder that dial-up circuit of the present utility model and decoding circuit adopt digital address scrambler and be complementary with encoder, when pressing dialing keyboard, encoder is launched geocoding, adopt a bus can make in the telephone network each phone receive the address coding signal that a certain phone sends simultaneously, the address coding signal that receives when a certain phone address decoder and this plane No. contrast when identical, start ringing circuit work; Other phone decoder receives that address code compares not simultaneously with this machine address code, can't start ringing circuit work.Therefore the utility model telephone structure is simple, and it is bigger that capacity is set, and can how much make up the capacity of setting according to address scrambler and address decoder output pin, and adopt a three-core conductor to make bus, and the telephone network construction cost is lower.

The utility model can further specify in conjunction with the accompanying drawings.

Fig. 1 is the utility model block diagram;

Fig. 2 is the utility model embodiment circuit diagram.

1 is dial-up circuit among Fig. 1, adopts digital address scrambler, and dialing keyboard direct and phone is connected.2 is decoding circuit, adopts digital address decoder, and the address code signal that the received code device sends also links to each other with ringing circuit.3 is ringing circuit, is subjected to the decoder Control work.4 is power supply.5 is speaking circuit, and speaking wire is opened work.

The utility model embodiment is as shown in Figure 2: dial-up circuit adopts 5026 address code ic chips ₁, IC ₁1 to 8 pin and phone keyboard 1-7 and be connected IC by key switch * number ₁9 pin be connected ground connection, R with the common line of lead ₁Be oscillation resistance, IC ₁17 pin link to each other with data wire; Decoding circuit adopts 5027 address decoder ic chips ₂, IC ₂1 to 8 pin link to each other IC with 1 to 8 on ﹠ off switch of 8 DIP switch ₂9 pin be connected ground connection with common line, IC ₂14 pin link to each other R with data wire ₃Be oscillation resistance, IC ₂By coupling resistance R ₂Link to each other with ringing circuit; Ringing circuit is by music integrated block IC ₃, triode BG ₁, BG ₂, BG ₃Constitute; Speaking circuit is by microphone MIC, triode BG ₄, BG ₅And diode bridge (D ₁, D ₂, D ₃, D ₄) constitute; The shared loud speaker T of the output of ringing circuit and speaking circuit.Balancing transformer B wherein ₁, resistance R ₈And capacitor C ₁Constitute anti-side-tone circuit, K ₁Be the switch that is connected with support, K when having got mobile phone ₁Closure, K when mobile phone is put into support ₁Disconnect K ₁Be arranged on the speaking wire; K ₂Be the switch of loud speaker T, K ₂Be positioned on the mobile phone.Its course of work is: during off-hook, and K ₁Closure, K ₂Connect the S end, speaking circuit is connected, and presses desire the phone number, corresponding and IC ₁The 1-8 pin connects key switch closure and the IC that presses number ₁Corresponding pin position connect, make IC ₁Produce pulse, to institute according to number IC1 will be in the serial pulses mode from 17 pin by data wire emission 4 times automatically continuously, the address code of being sent enters bus and is sent to each phone in the telephone network.Each phone when on-hook, K ₁Disconnect K ₂Connect the M end and disconnect speech circuit, connect ringing circuit, each phone IC ₂Be in information receiving state, the serial pulses that each phone receives on the data wire is delivered to IC always ₂During the 14th pin, IC ₂Receive pulse signal and this machine address code for 4 times relatively continuously, the signal of receiving and this machine address code not simultaneously, pulse signal can't be by the corresponding circuit formation of DIP switch loop, when pulse signal was identical with this machine address code, pulse signal entered IC ₂Form the loop, IC ₂The 17th pin is put high level, BG ₁Conducting, IC ₃Must be electric, ringing circuit work, T sends ring tone from loud speaker.The setting of this machine address code is undertaken by 256 kinds of various combination states of 8 DIP switch, and the corresponding ground connection of the pairing address wire of loCal number promptly forms this machine address code.Off-hook after a certain phone sends bell signal, K ₁Connect K ₂Connect the S end, process is by B ₁, R ₈, C ₁The anti-side-tone circuit of forming promotes the loud speaker sounding, when posting a letter, from the audio signal of microphone MIC through BG ₄, BG ₅Amplify, by diode-bridge circuit (D ₁, D ₂, D ₃, D ₄) audio signal is fed to bus.Post a letter working power by R ₇, K ₁, B ₁By bridge circuit (D ₁, D ₂, D ₃, D ₄) to the MIC circuit supply.This machine is at certain two phone message register, and other phone can't be conversed, and the line is busy in formation.

Claims

1, a kind of collinear machine of dialing mutually, three-core conductor by dial-up circuit, decoding circuit, ringing circuit, speaking circuit, power supply and access bus constitutes, it is characterized in that dial-up circuit adopts digital address scrambler, the address decoder that the encoder of decoding circuit employing and dial-up circuit is complementary.

2, the collinear machine of dialing mutually according to claim 1 is characterized in that digital address scrambler is 5026 geocoding integrated package (IC ₁), address decoder is 5027 address decoder integrated package (IC ₂), address decoder integrated package (IC ₂) the 1-8 pin be connected with 8 DIP switch.