CN2227387Y - Talk-back device for telephone exchange - Google Patents

Abstract

The utility model relates to a talk-back device which is composed of a host, extensions, the horn box of a user, and the connecting wires of matrix network. The control of four logic state is adopted between the host and the extensions. The utility model makes use of matrix theory for optimizing a bus structure, and a communication line and a control line are combined into a body. The two-way talk back can be carried out, and the circuit can be transferred on the spot. The utility model has the characteristics of convenient operation, easy installation, easy maintenance and less investment and is suitable for centralized management and scheduling command for the residential districts of buildings, dormitories, hospitals, factories, markets, hotels and guest houses.

Description

The call forwarding talkback unit

The utility model relates to a kind of talkback unit of exhaling mutually.

Traditional call talkback unit adopts the star topological structure, contains a main frame and a plurality of user, and each uses a pair of private line access between main frame and the user.This type of device is most to send call signal by main frame, and the user accepts and response.The talkback unit that also has main frame and user to make a call, but this device need be arranged numerous special circuits, and investment is big, lays numerous.For example, Chinese patent 88203508.8 provides a kind of bus-type master-slave mutual-call talkback unit of being exhaled electrophone and public twisted-pair feeder to constitute by main controller, line adapter unit, coincidence apparatus, quilt.This apparatus structure is complicated, and the indispensable exclusive telephone in each room, so investment is higher.

The purpose of this utility model provides that a kind of circuit is simplified, installation and maintenance are convenient, small investment exhale intercommunication and telephone switching apparatus mutually.

The purpose of this utility model is achieved in that the utility model comprises by single-chip microcomputer, keyboard, display, isolating transformer, telephone set, pure class A power amplifier, the reverse call power supply, 24 volts of AC power, send out receiver, switch, main frame four logic encoders, the main frame that reverse call four logic decoders etc. are formed, by amplifier, photoelectric coupling circuit, the R-S trigger, encoder, 24 volts of AC power, the reverse call controller, switch, extension set four logic decoders, the extension set that reverse call four logic encoders etc. are formed, user's loudspeaker box, casing, connecting line; One end of main frame four logic encoders joins with K switch 1, connecting line X4, and the other end is connected with 24 volts of AC power M9; Extension set four logic decoders link to each other with output line, output alignment respectively, and reverse call four logic encoders link to each other with encoder M13, encoder M14 output, and link to each other with connecting line X1-X4 by K switch 3; Adopt matrix-style to be connected between extension set and the loudspeaker box.

From digital circuit as can be known, a control line can transmit two kinds of logic states of high and low level, and three lines just can transmit eight kinds of logic states of 000-111.If in transmitting digital signals, adopt time sharing, promptly utilize the positive half cycle and the negative half period of alternating current respectively to transmit two kinds of logic states, and when alternately transmitting, utilize decoding technique, original logic state is separated and remained unchanged at receiving terminal, the signal that is transmitted on the single line just can double so, by transmitting two kinds of logic states, become and transmit four kinds of logic states, if the application matrix theory, will be just, the signal of negative half period is respectively as the words of row signal and column signal, the signal on the need-root line so only, just can finish 2 * 2=4 and select signal on two lines of function of one, just can finish 4 * 4=16 and select one function, the signal on three lines, just can finish 8 * 8=64 and select one function, by that analogy.As seen, adopt four logic state control methods, make information on the n root line, by 2 ⁿRise to 2 ²ⁿ, therefore, finish the required holding wire of same control and significantly reduce.

Main frame four logic encoder M1 are made up of K switch B1-KB6, diode D3-D8, K switch B1 links to each other with diode D3 is anodal, K switch B2 links to each other with diode D4 negative pole, the negative pole of diode D3 links to each other with the positive pole of diode D4, the other end of K switch B1 links to each other with the other end of K switch B2, and the connection of K switch B3-KB4, diode D5-D8 is identical therewith; Be solidified with control program among the single-chip microcomputer M2.Main frame reverse call four logic decoder M10 are made of resistance R, photoelectric coupling circuit N.Reverse call four logic decoder M10, main frame four logic encoder M1, keyboard M3, display M4 link to each other with single-chip microcomputer M2, telephone set M6 links to each other with isolating transformer M5, isolating transformer M5, a receiver P link to each other with pure class A power amplifier M7, K switch 2 links to each other with reverse call power supply M8, connecting line X1-X3 links to each other with K switch 1, connecting line X5-X6 links to each other with K switch 2, and connecting line X7-X8 links to each other with pure class A power amplifier M7.K switch B1-KB6 can use miniature relay or one-way SCR photoelectric coupling circuit among the main frame four logic encoder M1, by Single-chip Controlling.During without Single-chip Controlling, K switch B1-KB3, KB4-KB6 also can use two row's above interlock switch of three cuttves (8 of every rows weave into 8 sign indicating numbers) respectively;

Extension set four logic decoder M11 are made of relay J 1-J6, and string has diode D9-D14 in the coil; Diode D9 negative pole links to each other with relay J 1, diode D10 positive pole links to each other with relay J 2, diode D9 positive pole links to each other with diode D10 negative pole, connect a road of K switch 4, relay J 1 other end links to each other with relay J 2 other ends, connect the other a tunnel of K switch 4, diode D11-D14, relay J 3-J6 connects same as described above; The contact polyphone of the contact of relay J 1 and relay J 3, the contact polyphone of the contact of relay J 3 and relay J 5, the contact polyphone of the contact of relay J 2 and relay J 4, the contact polyphone of the contact of relay J 4 and relay J 6; K switch 4 other ends link to each other with connecting line X1-X4 respectively; Extension set reverse call four logic encoder M16 are made of controllable silicon light lotus root NB.Photoelectric coupling circuit N links to each other with output line H1-H8, output alignment L1-L8, R-S trigger RJ, R-S trigger RJ output links to each other with encoder M13, encoder M14 input, encoder M13, encoder M14 output link to each other with reverse call four logic encoder M16, reverse call controller M17 input links to each other with connecting line X5-X6, and output links to each other with R-S trigger RJ.

Main frame M can meet many extension set F, with an extension set F is example, by connecting line X1-X4 the four logic encoder M1 of main frame M and the decoder M5 of extension set F is linked, and by connecting line X5-X7 the connection of main frame M and extension set F is linked, add a ground wire again, totally 8 lines between main frame M and the extension set.Main frame M can put together with extension set F, also can if distance increases again, can increase the power of the amplifier in main frame M and the extension set F at a distance of hundreds of rice.Between extension set F and the user room, adopt the matrix-style wiring, every extension set F forms 8 * 8 matrix as using six relays, and each extension set F can meet 64 user's loudspeaker box U.Certainly, if increase relay and rearrange, can meet more user's loudspeaker box U;

Reverse call utilizes the communication matrix circuit, adopts photoelectric coupling circuit N and communication part to isolate;

User's loudspeaker box U is made up of loudspeaker SP, diode D1, voice switch S1, challenge switch S2, light-emitting diode D2, the end of loudspeaker SP links to each other with the normal-closed end of voice switch S1, and link to each other with the Chang Kaiduan of voice switch S1 by diode D1, its other end passes through light-emitting diode D2 and links to each other with challenge switch S2.In elected during a certain user's loudspeaker box U, diode D1 conducting among the loudspeaker box U, loudspeaker SP sounding.Diode D1 among all the other unchecked loudspeaker box U ends owing to bearing reverse voltage, and its loudspeaker SP is sounding not.

Advantage of the present utility model is:

1,, realizes remote intercommunication, so be specially adapted to residential area, the apartment of many buildings, the management in dormitory owing to adopted four logic state communications.

2, adopt matrix-style to connect, realize that one the tunnel selects one intercommunication to multichannel, make circuit simplify greatly, small investment, easy for installation, be convenient to operation and safeguard.

3, with isolating transformer phone is isolated, have the function of forward call, the alternative telephone exchange of part, communication context is enlarged.

4, have unique reverse call function, utilize the matrix circuit of former communication, when call extension main frame M, can control by extension set F.

The drawing explanation:

Fig. 1 is the main frame theory diagram;

Fig. 2 is main frame four logic encoder M1 schematic diagrams;

Fig. 3 is main frame four logic decoder schematic diagrams;

Fig. 4 is extension set and four logic decoder schematic diagrams;

Fig. 5 is an extension set reverse call schematic diagram;

Fig. 6 is extension set reverse call four logic encoder schematic diagrams;

Fig. 7 is user's loudspeaker box schematic diagram;

Fig. 8 is a main frame extension set talkback unit wiring diagram, among the figure: a Fi-i extension set, Hi-output line, Lj-output row (i, j=1,2,3 ...);

Fig. 9 is a flow chart.

Further specify detailed content of the present utility model below in conjunction with drawings and Examples:

During use, if made a call by main frame M, the user finishes the conversion of room number to four logic codings by keyboard M3 input extension set room number by single-chip microcomputer M2 (adopting 8031), shows extension number and room number by display M4.K switch 1 closure, K2 disconnects, and single-chip microcomputer M2 controls four logic encoder M1 (wherein K switch B1-KB6 adopts miniature relay) output, four logic codings.Send out the signal of receiver P and export to extension set F by pure class A power amplifier M7.This moment, extension set reverse call power supply disappeared, reverse call controller M17 connects K switch 4, K3 disconnects, main frame M four logical signals lead on the extension set four logic decoder M11, make the corresponding relays action, the voice signal of pure class A power amplifier M7 output among the main frame M is delivered on line and the alignment, the diode D1 in each user's loudspeaker box U constitutes the DC diode matrix together, the signal that main frame M comes makes loudspeaker SP sounding through normally closed point, the diode D1 of switch S 1.At this moment, on user's loudspeaker box U, just can hear the call signal of main frame M or the sound of speaking.

When the user pressed switch S 1, facing to loudspeaker SP speech, loudspeaker became the signal of telecommunication with voice signal, through delivering to extension set amplifier M12 the normal battle of switch S 1.Amplifier M12 amplifies subscriber signal and delivers to main frame M, and main frame is sent out in the receiver P promptly can hear user's one's voice in speech.

During forward call, telephone signal is sent into the pure class A power amplifier M7 of main frame, pass to the user by isolating transformer M5; With the output of extension set amplifier M12, M5 sends into telephone set by isolating transformer, finishes call forwarding.

After conversation is finished, K switch 2 closures, K1 disconnects, and main frame M closes the direct current output of pure class A power amplifier M7, and reverse call power supply M8 is connected, reverse direct voltage leads to matrix, and main frame M enters and treats call state, reverse call controller M17 action is connected K switch 3, and K4 disconnects.Extension set F goes up each row and column respectively a photoelectric coupling circuit N.If have user's called host M this moment, switch S 2 closures among user's loudspeaker box U, diode D2 is luminous, sends call signal.Photoelectric coupling circuit N conducting with corresponding row of user and row, utilize the R-S trigger that the ranks position is remembered, the output signal of R-S trigger is sent into encoder M13, encoder M14, becomes binary code, becomes four logic code by reverse call four logic encoder M16 again and sends to main frame M.Reverse call four logic decoder M10 receive the call signal that extension set F comes, and are translated into binary code, send into single-chip microcomputer M2.Single-chip microcomputer M2 is by each extension set F of scanning, and definite and demonstration room number sends the acousto-optic index signal simultaneously.

During reverse call, coding 000000 signal when not calling out is identical, so be listed as need not for 0 row 0 of every extension set F.Reverse call loss of voltage during conversation, R-S trigger automatic clear.

Claims (5)

1, a kind of call forwarding talkback unit, comprise one by single-chip microcomputer (M2), keyboard (M3), display (M4), isolating transformer (M5), telephone set (M6), pure class A power amplifier (M7), reverse call power supply (M8), 24 volts of AC power (M9), send out receiver (P), switch (K1), the main frame of forming (M) such as (K2), K by amplifier (M12), photoelectric coupling circuit (N), R-S trigger (RJ), encoder (M13), encoder (M14), 24 volts of AC power (M15), reverse call controller (M17), switch (K3), the extension set of forming (F) such as (K4), K * I * J user's loudspeaker box (U), casing, connecting line is characterized in that: main frame (M) also comprises main frame four logic encoders (M1), reverse call four logic decoders (M10); Extension set (F) also comprises extension set four logic decoders (M11), reverse call four logic encoders (M16); One end of main frame four logic encoders (M1) joins with switch (K1), connecting line (X4), and the other end is connected with 24 volts of AC power (M9); Extension set four logic decoders (M11) respectively with output line (H1)-(H8), output alignment (L1)-(L8) link to each other, reverse call four logic encoders (M16) link to each other with encoder (M13), encoder (M14) output, and by switch (K3) and connecting line (X1)-(X4) link to each other; Adopt matrix-style to be connected between extension set (F) and the loudspeaker box (U).

2, call forwarding talkback unit according to claim 1, it is characterized in that described main frame four logic encoders (M1) are by switch (KB1)-(KB6), diode (D3)-(D8) form, switch (KB1) links to each other with diode (D3) is anodal, switch (KB2) links to each other with diode (D4) negative pole, the negative pole of diode (D3) links to each other with the positive pole of diode (D4), the other end of switch (KB1) links to each other with the other end of switch (KB2), and switch (KB3)-(KB4), diode (D5)-(D8) connect identical therewith.

3, call forwarding talkback unit according to claim 1 is characterized in that described extension set four logic decoders (M11) are made of relay (J1)-(J6), and string has diode (D9)-(D14) in the coil; Diode (D9) negative pole links to each other with relay (J1), diode (D10) is anodal to link to each other with relay (J2), diode (D9) is anodal to link to each other with diode (D10) negative pole, connect a road of K switch 4, relay (J1) other end links to each other with relay (J2) other end, connect the other a tunnel of switch (K4), diode (D11)-(D14), relay (J3)-(J6) connects same as described above; The contact polyphone of the contact of relay (J1) and relay (J3), the contact polyphone of the contact of relay (J3) and relay (J5), the contact polyphone of the contact of relay (J2) and relay (J4), the contact polyphone of the electric shock of relay (J4) and relay (J6); Switch (K4) other end respectively with connecting line (X1)-(X4) link to each other.

4, according to claim 1,2 or 3 described call forwarding talkback units, it is characterized in that reverse call utilizes the communication matrix circuit, adopt photoelectric coupling circuit (N) and communication part to isolate.

5, call forwarding talkback unit according to claim 1, it is characterized in that described user's loudspeaker box (U) is made up of loudspeaker (SP), diode (D1), voice switch (S1), challenge switch (S2), light-emitting diode (D2), one end of loudspeaker (SP) links to each other with the normal-closed end of voice switch (S1), and link to each other with the Chang Kaiduan of voice switch (S1) by diode (D1), its other end passes through light-emitting diode (D2) and links to each other with challenge switch (S2).

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