CN2157640Y

CN2157640Y - Inverted signal generator for telephone

Info

Publication number: CN2157640Y
Application number: CN 93208784
Authority: CN
Inventors: 袁平; 雷光学
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-07
Filing date: 1993-04-07
Publication date: 1994-02-23
Anticipated expiration: 2003-04-07

Abstract

The utility model relates to an inverted signal generator for a telephone, which is composed of a central controller, an interface circuit of the telephone line and a subscriber telephone line, a terminal scanner, a signal amplifier, a signal extractor and an executive circuit. The central controller controls the terminal scanner to scan user interfaces of all paths to get the state information of caller off-hook and on-hook of all paths. After the caller lifts the telephone, a central office line signal is sent into the central controller through signal amplification and signal extraction; the central controller distinguishes the answer signal of a called party to generate simulated opposite polarity signal through the executive circuit. The utility model works reliably, and solves the problem of scarcity of the opposite polarity signal in a telephone system.

Description

Inverted signal generator for telephone

The utility model is a kind of phone polarity reversing signal generator.

Polarity reversing signal is the signal that is used to judge callee's off-hook that is provided by telephone office.Disposed the user that charging machine or subscriber exchange need be realized immediate charging to trunk call for those, polarity reversing signal is as the initiating signal of the beginning of chargeing.Therefore, be indispensable to the toll communication polarity reversing signal of realizing chargeing immediately, accurately, reliably.But, because the mistake in the resource distribution is not that each bar telephone line can both provide polarity reversing signal.The polarity reversing signal function is the rare relatively resource of existing phone system.In recent years, because demand growth is exceedingly fast to the toll communication immediate charging, as: the increasing of the setting of telephone booth and each big hotel, they all need immediate charging is carried out in user's trunk call, so the contradiction between this resource and the demand becomes increasingly conspicuous.In order to solve this contradiction, in prior art, also the someone makes the Analogous Polarity reversing Signal generator, but all fails because of performance is unreliable.Up to the present, do not see have more satisfactory, reliable phone polarity reversing signal generator to come out.

The purpose of this utility model provides a kind of phone polarity reversing signal generator of dependable performance, and it can produce the polarity reversing signal of simulation to the direct distance dialing user.

Solution of the present utility model is as follows: referring to Fig. 1, this signal generator has a master controller that is made of scm managing system to be used to finish to the coordinated operation of complete machine and the control of work, this master controller is by single-chip microcomputer 1, program storage 2, address latch 3 and address decoder 4 are formed.This machine that this signal generator has a multichannel and the interface circuit 5 of subscriber's telephone line be used to finish multichannel subscribers feeder and this machine be connected, finish that each road calling party plucks, the sensing of on-hook signal and the collection of Ge Lu callee's signal and the conversion of polarity reversing signal, described each road interface circuit by callee's signal picker, calling party pluck, on-hook signal sensing circuit and polarity reversing signal transducer constitute.This signal generator has a TCP device, this TCP device is used to finish by master controller control and the continuous scanning of each road user interface is obtained each road calling party plucks, the state information of on-hook, this TCP device by the user of the condition discrimination interface circuit 6 of single-chip microcomputer and Ge Lu pluck, on-hook transducing signal output circuit 7 constitutes.This signal generator also has amplification and the extraction that a multiple signals amplifier 8 and multiple signals extractor 9 are used to finish each road callee's signal, and the signal that is extracted is sent into single-chip microcomputer.This signal generator also has an executive circuit, this executive circuit is controlled the automatic control of finishing each road polarity reversing signal transducer by master controller, and the drive circuit 11 that this executive circuit is carried out relay by the executive's interface circuit 10 and the multichannel of single-chip microcomputer constitutes.

Superiority of the present utility model is reliable operation, the comparatively ideal rare problem of current system call polarity reversing signal that solved.

Describe its operation principle in detail according to embodiment below.

Fig. 1, functional-block diagram of the present utility model.

Fig. 2, the concrete line map of master controller.

Fig. 3, this machine and subscriber's telephone line interface circuit figure.

Fig. 4, the circuit diagram of TCP device.

Fig. 5, the circuit diagram of signal amplifier and dector.

Fig. 6, executive circuit figure.

Fig. 7, print interface circuit figure.

Fig. 8, the contour structures schematic diagram.

Fig. 9, this machine user mode wiring schematic diagram.

Referring to Fig. 1, this example is an example to control eight road subscriber's telephone lines, the block diagram circuit of No. eight telephone wires of control shown in the figure.

Referring to Fig. 2, device U01 adopts the MCS-51 series monolithic, and this example adopts 8031, its P0 mouth is a data port, and the P2 mouth is an address mouth, and the P1 mouth is the called party answer signal input, device U02 is the high address latch, and device U03 is a program storage, and device U08 is an address decoder.

Referring to Fig. 3, described polarity reversing signal transducer is made of the duplex moving contact 13 of carrying out relay, and wherein A1, B1 two ends and phone exchange line join, and A1 ', B1 ' two ends and subscriber's telephone line join.Suppose the anode of A1 termination phone exchange line, and B1 termination negative terminal, then the duplex moving contact does not move when promptly being positioned at position shown in the figure, A1 ' end is for just, B1 ' end is negative, and when making the duplex moving contact beat to illustrated opposite location by the action of master controller control relay, then A1 ' end is for negative, B1 ' end is being for just, thereby finishes the conversion of reversed polarity.Described calling party plucks, the on-hook sensing circuit is made of two photoelectrical coupler U23, U24.When the calling party carried machine, A1 ', B1 ' two ends were connected, and the luminous tube among the photoelectrical coupler U23 is bright, then Dui Ying photosensitive tube conducting, and the output high level signal is sent into, and the calling party plucks, on-hook transducing signal output circuit 7-1; If A1, B1 two ends error-polarity connection, then photoelectrical coupler U24 action, a same exportable high level signal is sent into transducing signal output circuit 7-1, this high level signal by or the door 14 after, light light-emitting diode D29 on the one hand, to indicate this road phone to carry machine, send into the DI0 end of the condition discrimination interface circuit of single-chip microcomputer on the other hand again.Adopt in this interface circuit that photoelectrical coupler is plucked, the sensing of on-hook signal, telephone line and this machine can be isolated, be not subjected to external interference to guarantee the stable of this machine work.Described callee's signal picker is made of transformer TR1.After the calling party carried machine, phone exchange line signal was sent into by A1, B1 two ends, and gives signal amplifier U21:A by the coupling of transformer TR1.

Referring to Fig. 4, the condition discrimination interface circuit of described single-chip microcomputer is made of bus conveyer U43, and each road calling party plucks, the signal of on-hook transducing signal output circuit 7-1～7-8 output is all sent into the DI mouth of this interface circuit.Single-chip microcomputer constantly scans the DI mouth, makes master controller obtain in time that each road user plucks, the state information of on-hook.

Referring to Fig. 5, described signal amplifier 8-1 and dector 9-1 are connected and composed by amplifier U21:A and single-tone decoder U13 and peripheral cell thereof.After the calling party carries machine, phone exchange line signal is admitted to the negative input end of amplifier U21:A after transformer coupled, the process signal amplifies the back, the process capacitive coupling is admitted to 3 pin of device U13 again, and device U13 extracts the P1.0 end that the called party answer signal is sent into single-chip microcomputer from input signal.Single-chip microcomputer is differentiated the back to the called party answer signal and is sent control signal corresponding by the executive's interface circuit of single-chip microcomputer.

Referring to Fig. 6, the executive's interface circuit of described single-chip microcomputer is made of eight D-latch U10.Single-chip microcomputer is sent one group of control corresponding sign indicating number by the Q0-Q7 end of device U10, and then yardage is switched on for " 1 " pairing relay drive circuit, and the duplex moving contact action of relay produces the polarity reversing signal of simulation.When single-chip microcomputer detects calling party's on-hook by the TCP device, then pass through the previous status of executive circuit reset relay duplex moving contact again.

Referring to Fig. 7, the utility model also can be provided with printing function, in order to the number of times of recording user toll message, duration etc.Print interface circuit is made of eight D-latch U44 and printer connector CZ1.

Referring to Fig. 8,9, Fig. 8 illustrates this routine overall structure, and Fig. 9 provides this machine when user mode and the annexation of external device.

Claims

1, phone polarity reversing signal generator is characterized in that:

A. it has a master controller that is made of scm managing system and is used to finish to the coordinated operation of complete machine and the control of work, and this master controller is by single-chip microcomputer (1), program storage (2), and address latch (3) and address decoder (4) are formed,

B. it have this machine of a multichannel and the interface circuit of subscriber's telephone line (5) be used to finish multichannel subscribers feeder and this machine be connected, finish that each road calling party plucks, the sensing of on-hook signal and the collection of Ge Lu callee's signal and the conversion of polarity reversing signal, described each road interface circuit by callee's signal picker, calling party pluck, on-hook signal sensing circuit and polarity reversing signal transducer constitute

C. it has a TCP device, this TCP device is used to finish by master controller control and the continuous scanning of each road user interface is obtained each road calling party plucks, the state information of on-hook, this TCP device by the user on the condition discrimination interface circuit (6) of single-chip microcomputer and each road pluck, on-hook transducing signal output circuit (7) constitutes

D. it also has amplification and the extraction that a multiple signals amplifier (8) and multiple signals extractor (9) are used to finish each road callee's signal, and the signal that is extracted is sent into single-chip microcomputer,

E. it also has an executive circuit, this executive circuit is controlled the automatic control of finishing each road polarity reversing signal transducer by master controller, and the drive circuit (11) that this executive circuit is carried out relay by the executive's interface circuit (10) and the multichannel of single-chip microcomputer constitutes.

2, phone polarity reversing signal generator as claimed in claim 1 is characterized in that: described calling party plucks, the on-hook signal sensing circuit is made of two photoelectrical coupler U23, U24.