CN2062928U - Electronic circuit for subscriber interface - Google Patents
Electronic circuit for subscriber interface Download PDFInfo
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- CN2062928U CN2062928U CN 89220795 CN89220795U CN2062928U CN 2062928 U CN2062928 U CN 2062928U CN 89220795 CN89220795 CN 89220795 CN 89220795 U CN89220795 U CN 89220795U CN 2062928 U CN2062928 U CN 2062928U
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Abstract
The utility model discloses an electronic circuit for subscriber interface, mainly comprising an interface circuit, an echo suppressor circuit, a ring trip circuit, etc. The electronic circuit realizes the functions of two wire four wire transformation of programmed control digital exchange subscriber circuit, hooking on and off detection, ringing and ring trip control, telephone direct current supply, signal transmission, etc. Meanwhile, the utility model has the advantages of simple circuit, high reliability, convenient operation and maintenance, low cost, and easy installation and debugging, and the main components all can adopt integrated assemblies. Besides, the utility model can make hybrid integrated circuit modules by general technology, which is suitable for programmed control digital subscriber exchangers.
Description
The utility model relates to the electronic type user interface circuit device in wired communications field, is specially adapted to middle-size and small-size digital spc subscriber exchange and makes user's interface circuit.
The user's interface device of at present domestic digital spc subscriber exchange, mostly be to adopt the external integrated chip of producing, this class chip adopts ultra-large single piece of silicon integrated circuit technology to produce, include a hundreds of components and parts such as high-power, high pressure simulation device, combinational logic and sequential logic digital circuit in the chip, single piece of silicon SLICHC-5501 chip as the Harris company of the U.S. just comprises more than 300 components and parts, the difficulty of its production technology is very big, at present domesticly can't produce substantially.Adopt the switch of introduction device assembling or the switch of import in addition; in case defect appears in this class interface device; need to send manufacturer to change whole plank and repair; also need outside the pale of civilization remittance or high price RMB to buy chip even oneself repair; production domesticization to China's SPC digital switch is very unfavorable; when using this class interface device chip in addition; also need add complicated protective circuit and other interface device etc.; as shown in Figure 5; it is a kind of use electrical schematic diagram of HC5504 type interface arrangement chip; this interface arrangement chip 12 also needs external overvoltage crowbar D1 when using; D2; D3; D4; power supply circuits R10; R11; R12; terminal balance circuit R13; C4; R14; C5; echo is suppressed circuit R15; C10; C11; R16; Lu wave circuit C6; C7; C8; C9 etc.; therefore make whole interface circuit more complicated; volume increases; bring certain difficulty to user's use; and cost an arm and a leg the cost height.
The purpose of this utility model be to avoid above-mentioned deficiency of the prior art and provide a kind of circuit simple, debug easily, the electronic type user interface circuit device of dependable performance, the utility model entire circuit also need be with producing the very lagre scale integrated circuit (VLSIC) complicated technology, and be made into hybrid integrated circuit structure module or printed panel dongle configuration with the technology of producing general integrated circuit, make the user use, keep in repair, change very convenient, and with low cost, be convenient to produce in batches.
The purpose of this utility model is finished as follows: it is by phone power supply circuits 1; overvoltage crowbar 2; 4; interface circuit 3; two or four line built-up circuits 5; echo is suppressed circuit 6; transtation mission circuit 7; cut bell circuit 8; picking/hanging machine detection circuit 9; control circuit 10; receiving circuit 11 is formed; wherein interface circuit 3 is by capacitor C 1; C2 and resistance R 1; R2 constitutes; capacitor C 1 one ends and relay J normally-closed contact C; the input of phone power supply circuits 1; overvoltage crowbar 2 outputs connect; capacitor C 1 other end 1 and resistance R 1 one ends; overvoltage crowbar 4 outputs; the input of two or four line built-up circuits 5 connects; resistance R 1 other end is connected with the output 2 of two or four wrapped circuits 5; capacitor C 2 one ends and relay J normally-closed contact D; the output of phone power supply circuits 1; overvoltage crowbar 2 outputs connect; capacitor C 2 other ends and resistance R 2 one ends; overvoltage crowbar 4 outputs; the input 3 of two or four line built-up circuits 5 connects, and the other end of resistance R 2 is connected with the output 4 of two or four line built-up circuits 5.
Echo is suppressed circuit 6 by resistance R 3, R4, R5, R6, R7 and operational amplifier Y constitute, resistance R 3, the end of R4 and connect the back be connected with operational amplifier Y inverting input negative terminal, resistance R 3 other ends and operational amplifier Y output, transtation mission circuit 7 inputs connect, resistance R 4 other ends are connected with the output 5 of two or four line built-up circuits 5, resistance R 5 one ends are connected with operational amplifier in-phase input end anode, the other end and resistance R 6, the end of R7 also connects, resistance R 6 other ends connect earth terminal, the input 6 of resistance R 7 other ends and two or four line built-up circuits 5, receiving circuit 11 outputs connect.
Cutting bell circuit 8 is made up of capacitor C 3, resistance R 8, R9, photoelectrical coupler P, capacitor C 3 one ends and relay J normally opened contact B, 2 ends of photoelectrical coupler P connect, other end earth terminal, resistance R 8 one ends are connected with 1 end of photoelectrical coupler P, other end earth terminal, 5 ends of resistance R 9 one ends and photoelectrical coupler P, picking/hanging machine detection circuit 9 outputs, control circuit 10 input end interface output F are connected, resistance R 9 other ends are connected with power positive end V, and 4 ends of photoelectrical coupler P are connected with the ground end.
And the capacitor C 1 of interface circuit 3, C2 range of capacity are that 2 to 30 microfarads, resistance R 1, R2 Standard resistance range are 220 to 2000 ohm, resistance R 3, R4, R5, R6, R7 Standard resistance range that echo is suppressed circuit 6 are 5,000 to 300 kilohms, and capacitor C 3 ranges of capacity of cutting bell circuit 8 are that 200 to 1000 microfarads, resistance R 8 Standard resistance ranges are that 50 to 1000 ohm, resistance R 9 Standard resistance ranges are 5,000 to 10 kilohms.
Simultaneously whole circuit of the present utility model are except that capacitor C 1, C2, C3, can be made into the hybrid integrated circuit modular structure or be made into components and parts to be installed in dongle configuration on the bar printing plate.
The utility model has following advantage compared to existing technology: circuit design is simple, dependable performance, debug easily, the utility model can adopt common operational amplifier to realize simultaneously, need not high pressure, high-current device, other circuit such as echo in the utility model are suppressed circuit, cutting bell circuit etc. also can adopt integrated package to be assembled, entire circuit also need not used the complicated technology of producing very lagre scale integrated circuit (VLSIC), and be made into hybrid integrated circuit modular structure or printed panel dongle configuration with the technology of producing general integrated circuit, thereby the user uses, maintenance, change very convenient, simultaneously with low cost, general integrated circuit producer or switch producer all can manufacture, and are a kind of ideal user interface circuit devices that middle-size and small-size digital spc subscriber exchange uses that is suitable for of novelty.
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a functional-block diagram of the present utility model.
Fig. 2 is the electrical schematic diagram of the utility model interface circuit 3.
Fig. 3 is the electrical schematic diagram that the utility model echo is suppressed circuit 6.
Fig. 4 is the electrical schematic diagram that the utility model cuts bell circuit 8.
Fig. 5 is a kind of use electrical schematic diagram of HG5504 type interface arrangement chip.
With reference to Fig. 1; Fig. 2; Fig. 3; Fig. 4; the utility model is by phone power supply circuits 1; overvoltage crowbar 2; 4; interface circuit 3; two or four line built-up circuits 5; echo is suppressed circuit 6; transtation mission circuit 7; cut bell circuit 8; picking/hanging machine detection circuit 9; control circuit 10; receiving circuit 11 is formed; wherein interface circuit 3 is by capacitor C 1; C2 and resistance R 1; R2 constitutes; capacitor C 1 one ends and relay J normally-closed contact C; the input of phone power supply circuits 1; overvoltage crowbar 2 outputs connect; capacitor C 1 other end and resistance R 1 one ends; overvoltage crowbar 4 outputs; the input 1 of two or four line built-up circuits 5 connects; resistance R 1 other end is connected with the output 2 of two or four line built-up circuits 5; capacitor C 2 one ends and relay J normally-closed contact D; the output of phone power supply circuits 1; the output of overvoltage crowbar 2 connects; capacitor C 2 other ends and resistance R 2 one ends; overvoltage crowbar 4 outputs; the input 3 of two or four line built-up circuits 5 connects, and the other end of resistance R 2 is connected with the output 4 of two or four line built-up circuits 5.And the capacitor C 1 of interface circuit 3, C2 range of capacity are 2 to 30 microfarads, and embodiment all adopts the electrolytic capacitor of commercially available 4.7 microfarads, and the Standard resistance range of resistance R 1, R2 is 220 to 2000 ohm.Embodiment all adopts commercially available 300 ohm fixed carbon resister.Phone power supply circuits 1 its effect of the present utility model is to provide working direct current to substation.Overvoltage crowbar 2 its effects are when high pressure occurring on exchanger user incoming line R, the output line T; the protection late-class circuit is not damaged, the overvoltage crowbar in the DBX-1200 type SPC digital switch of its employing introduction U.S. TELEX company production of embodiment.Overvoltage crowbar 4 its effects are to import when excessive when audio signal, and a protection back level operational amplifier Y is not damaged.The circuit that embodiment phone power supply circuits 1, overvoltage crowbar 4 adopt in the GTD-120 type SPC digital switch of introducing the production of U.S. GTE company.5 its effects of two or four line built-up circuits are that telephone wire two wires balance transmission is converted to the uneven transmission of required four lines of digital communication, embodiment its adopt that in October, 1987, the People's Telecon Publishing House published, by two or the four line built-up circuits of " the numeral exchange is basic " book of works such as ［ U.S. ］ John MacDonald, Liu Chonglong, Yang Weili translation.The embodiment of relay J adopts commercially available Guizhou to spare the JRW-3M030 type relay that group U.S. Radio Appliances Factory produces, its normally opened contact A connects subscriber exchange ringing current generator output, relay J one moving contact is connected with exchanger user incoming line R, and another moving contact is connected with exchanger user output line T.
Echo is suppressed circuit 6 by resistance R 3, R4, R5, R6, R7 and operational amplifier Y constitute, resistance R 3, the end of R4 and connect the back be connected with operational amplifier Y inverting input negative terminal, resistance R 3 other ends and operational amplifier Y output, transtation mission circuit 7 inputs connect, resistance R 4 other ends are connected with the output 5 of two or four line built-up circuits 5, resistance R 5 one ends are connected with operational amplifier in-phase input end anode, the other end and resistance R 6, the end of R7 also connects, resistance R 6 other end earth terminals, the input 6 of resistance R 7 other ends and two or four line built-up circuits 5, receiving circuit 11 outputs connect, and echo is suppressed the resistance R 3 of circuit 6, R4, R5, R6, the R7 Standard resistance range is 5,000 to 3000 kilohms, embodiment all adopts commercially available 5600 ohm fixed carbon resister, and operational amplifier Y embodiment adopts the common integrated operational amplifier circuit of commercially available MC3403P type (or similar products like all can).Transtation mission circuit 7 its effects are the four-wire circuits that the signal that the telephone wire two wires is come are transferred to the next stage digital communication in the utility model, and the output G of transtation mission circuit 7 connects subordinate's subscriber line circuit codec or amplifier in.Receiving circuit 11 its effects are to receive the back level will be sent to upward phone subscriber signal of exchanger user incoming line R, output line T, and the input H of receiving circuit 11 connects the output of back level subscriber line circuit codec or amplifier.Embodiment transtation mission circuit 7, receiving circuit 11 all adopt general anti-phase input operational amplifier, and the commercially available prod is MC3403 type integrated device or similar device.
Cutting bell circuit 8 is made of capacitor C 3, resistance R 8, R9, photoelectrical coupler P, capacitor C 3 one ends and relay J normally opened contact B, 2 ends of photoelectrical coupler P connect, other end earth terminal, resistance R 8 one ends are connected with 1 end of photoelectrical coupler P, other end earth terminal, resistance R 9 one ends are connected with 5 ends, picking/hanging machine detection circuit 9 outputs, the control circuit 10 input end interface output F of photoelectrical coupler P, resistance R 9 other ends are connected with power positive end V, embodiment power positive end voltage is positive 5 volts, and 4 ends of photoelectrical coupler P are connected with the ground end.And capacitor C 3 ranges of capacity of cutting bell circuit 8 are 200 to 1000 microfarads, embodiment capacitor C 3 adopts the electrochemical capacitor of commercially available 220 microfarads, resistance R 8 Standard resistance ranges are 50 to 1000 ohm, it adopts commercially available 56 ohm fixed carbon resister embodiment, resistance R 9 Standard resistance ranges are 5,000 to 10 kilohms, it adopts commercially available 6800 ohm fixed carbon resister embodiment, photoelectrical coupler P embodiment adopts commercially available GH303 type photoelectric coupled device, and 1 of photoelectrical coupler P, 2,4,5 labels are this device pin label in the accompanying drawing 4.Interface output F connects exchange processor in the utility model.Picking/hanging machine detection circuit 9 its effects are to detect substation dislodging machine signal and dial impulse signal, and two input is connected with two outputs of phone power supply circuits 1.Control circuit 10 its effects are control relay J adhesives or recover normally off, control circuit 10 output E connect an end of relay J coil, the relay J coil other end connects positive 5 volt DC power supplys, embodiment picking/hanging machine detection circuit 9, control circuit 10 all adopt the related circuit in the GTD-120 type SPC digital switch of introducing the production of U.S. GTE company.
Whole circuit of the present utility model is except that capacitor C 1, C2, C3, can be made into the hybrid integrated circuit modular structure or be made into components and parts and be installed in dongle configuration on the bar printing plate, embodiment is that the components and parts of whole circuit all adopt discrete component to be installed on 110 millimeters of block lengths, the wide 50 millimeters printed circuit board (PCB), external connection input, output and the interface end printed panel of entire circuit device is made into the plug construction of dongle configuration, embodiment adopts commercially available printed circuit connector and its assembling, is convenient to user installation and uses.
The utility model operation principle is summarized as follows: when electronic type user interface circuit device is done caller, user's one off-hook, then phone power supply circuits 1 constitute the phone DC channel by relay J normally-closed contact C, the relay J normally-closed contact D send picking/hanging machine detection circuit 9 with direct current signal, the output off hook signal is delivered the processor identification of changing planes to interface output F, also be transferred to simultaneously control circuit 10, make relay J be in reliable normally closed operating state, after exchange processor recognizes this user's off hook signal, input H by receiving circuit 11, dialing tone is transferred to the calling subscriber, calling subscriber's dialing, after dial impulse is transferred to picking/hanging machine detection circuit 9 by phone power supply circuits 1, export exchange processor identification to from interface output F, exchange processor identifies the called subscriber address according to the dialing of caller, to called terminal ringing, make caller and called connection at last, called speech from receiving circuit 11 input H through electronic type user interface circuit device, send the calling subscriber at last, calling subscriber's speech also passes through electronic type user interface circuit device, output to the called subscriber from transtation mission circuit 7 output G outputs, both sides' foundation of conversing.After The Calling Party Hooks On,, send picking/hanging machine detection circuit 9 afterwards to detect, and will detect high level signal and be transferred to exchange processor identification through interface output F still by phone power supply circuits 1 received signal.
When the electronic user interface circuit device is done when called, switch is transferred to control circuit 10 with control signal, make control apparatus 10 output low levels, then relay J adhesive, its normally opened contact A, B respectively with exchanger user incoming line R, output line T connects, and then ringing signal is transferred to substation from relay J normally opened contact A, makes the substation ring.Behind the substation off-hook, the DC component of ringing signal is transferred to cuts bell circuit 8, then cut bell circuit 8 output control signals, make the output E of control circuit 10 be converted to high level, then relay J is moved not adhesive, its normally opened contact A, B respectively with exchanger user incoming line R, output line T disconnects, still revert to relay J normally-closed contact C, D respectively with exchanger user incoming line R, output line T is connected, exchange processor identifies this called off hook signal simultaneously, make caller and called UNICOM, both sides' foundation of conversing, after the on-hook, the course of work is identical as mentioned above.
Claims (3)
1, a kind of by phone power supply circuits 1, overvoltage crowbar 2,4,24 line built-up circuits 5, transtation mission circuit 7, picking/hanging machine detection circuit 9, control circuit 10, the electronic type user interface circuit device that receiving circuit 11 is formed, it is characterized in that interface circuit 3, echo are suppressed circuit 6, cut bell circuit 8 compositions in addition, wherein interface circuit 3 is made of capacitor C 1, C2 and resistance R 1, R2; Capacitor C 1 one ends and relay J normally-closed contact C; the input of phone power supply circuits 1; overvoltage crowbar 2 outputs connect; capacitor C 1 other end and resistance R 1 one ends; overvoltage crowbar 4 outputs; the input 1 of two or four line built-up circuits 5 connects; resistance R 1 other end is connected with the output 2 of two or four line built-up circuits 5; capacitor C 2 one ends and relay J normally-closed contact D; the output of phone power supply circuits 1; overvoltage crowbar 2 outputs connect, capacitor C 2 other ends and resistance R 2 one ends, overvoltage crowbar 4 outputs; the input 3 of two or four line built-up circuits 5 connects; the other end of resistance R 2 is connected with the output 4 of two or four line built-up circuits 5
Echo is suppressed circuit 6 by resistance R 3, R4, R5, R6, R7 and operational amplifier Y constitute, resistance R 3, the end of R4 and connect the back be connected with operational amplifier Y inverting input negative terminal, resistance R 3 other ends and operational amplifier Y output, transtation mission circuit 7 inputs connect, resistance R 4 other ends are connected with the output 5 of two or four line built-up circuits 5, resistance R 5 one ends are connected with the operational amplifier in-phase input end, the other end and resistance R 6, the end of R7 also connects, resistance R 6 other ends connect earth terminal, the input 6 of resistance R 7 other ends and two or four line built-up circuits 5, receiving circuit 11 outputs connect
Cut bell circuit 8 and constitute capacitor C 3 by capacitor C 3, resistance R 8, R9, photoelectrical coupler P
One end and relay J normally opened contact B, 2 ends of photoelectrical coupler P connect, other end earth terminal, resistance R 8 one ends are connected with the end of photoelectrical coupler P, other end earth terminal, 5 ends of resistance R 9 one ends and photoelectrical coupler P, picking/hanging machine detection circuit 9 outputs, control circuit 10 inputs, interface output F connects, resistance R 9 is that an end is connected with power positive end V, and 4 ends of photoelectrical coupler P are connected with the ground end.
2, electronic type user interface circuit device according to claim 1, capacitor C 1, the C2 range of capacity that it is characterized in that interface circuit 3 is that 2-30 microfarad, resistance R 1, R2 Standard resistance range are 220 to 2000 ohm, resistance R 3, R4, R5, R6, R7 Standard resistance range that echo is suppressed circuit 6 are 5,000 to 300 kilohms, and capacitor C 3 ranges of capacity of cutting bell circuit 8 are that 200 to 1000 microfarads, resistance R 8 Standard resistance ranges are that 50 to 1000 ohm, resistance R 9 Standard resistance ranges are 5,000 to 10 kilohms.
3, electronic type user interface circuit device according to claim 1 and 2 is characterized in that whole circuit except that capacitor C 1, C2, C3, can be made into the hybrid integrated circuit modular structure or be made into components and parts to be installed in dongle configuration on the bar printing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89220795 CN2062928U (en) | 1989-12-14 | 1989-12-14 | Electronic circuit for subscriber interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89220795 CN2062928U (en) | 1989-12-14 | 1989-12-14 | Electronic circuit for subscriber interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2062928U true CN2062928U (en) | 1990-09-26 |
Family
ID=4875400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89220795 Withdrawn CN2062928U (en) | 1989-12-14 | 1989-12-14 | Electronic circuit for subscriber interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2062928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118600A (en) * | 2011-03-01 | 2011-07-06 | 汉达尔通信技术(北京)有限公司 | Visual terminal based on fixed telephone network |
-
1989
- 1989-12-14 CN CN 89220795 patent/CN2062928U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118600A (en) * | 2011-03-01 | 2011-07-06 | 汉达尔通信技术(北京)有限公司 | Visual terminal based on fixed telephone network |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |