CN2682758Y - Wireless access device for fixed telephone network - Google Patents
Wireless access device for fixed telephone network Download PDFInfo
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- CN2682758Y CN2682758Y CN 200420038519 CN200420038519U CN2682758Y CN 2682758 Y CN2682758 Y CN 2682758Y CN 200420038519 CN200420038519 CN 200420038519 CN 200420038519 U CN200420038519 U CN 200420038519U CN 2682758 Y CN2682758 Y CN 2682758Y
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Abstract
The utility model discloses a wireless access device for fixed telephone network. The wireless access device for fixed telephone network adopts a chip microprocessor as the core system function control circuit. The chip microprocessor is connected with a rigid network device interface and a wireless interface. The rigid network device interface is connected with a telephone terminal; the wireless interface is connected with a PHS terminal; through that the PHS terminal is connected with the PHS net and the PSTN net users, the talking and data transfer between the both parties are realized. The wireless access device for fixed telephone network has a comparative simple device structure and transforms the moveable usage mode of the PHS terminal into a fixed usage mode, avoiding the original defects of that the microcell of xiao ling tong mobile phone has to be switched while crossing zones and that the signal density of field is uneven and labile in space distribution, obviously eradicating the phenomena of speaking breakings and inexplicit voice, providing with high quality for communication service. The wireless access device for fixed telephone network can be assembled flexibly in use according to the quantity of fixed telephone subscribers, especially used for replacing the telephone cable to solve the problem when the fixed telephone is connected with the fixed telephone network for a new user for temporary, with little investment and fast effect.
Description
Affiliated technical field
The utility model relates to a kind of transmitting device of digital information, in particular for the device that connects between dissimilar exchanging system networks.
Background technology
Telecommunication department lacks the line district at fixed-line telephone network and runs into the user and the part pipeline installation is long in time limit, the high section of cost of remaining to be installed, need landline telephone that a cambic device can replace the interim new user of solution of Telephone Cable and be connected to problem in the fixed-line telephone network, make them obtain service as early as possible.It is 98116055.7 that Chinese invention patent ublic specification of application CN1205590A discloses number of patent application, name is called the technical scheme of " device that is connected telephone exchange and fixed-line telephone network by the fixed radio telephone terminal ", the exchange side that a plurality of fixed telephone subscriber's terminals are connected to a telephone exchange is proposed, another exchange side of this telephone exchange connects a plurality of fixed GSM radio telephone terminals, gsm radio phone network under the fixed radio telephone terminal is communicated with fixed-line telephone network, these fixed GSM radio telephone terminals dynamically distribute under the control of a Coordination Treatment machine, to set up the telephone communication of fixed-line telephone network and fixed telephone subscriber's terminal room.This scheme is owing to will use telephone exchange to be connected a plurality of fixed GSM radio telephone terminals with the Coordination Treatment machine, the structure more complicated, only be fit to the very big occasion of fixed telephone subscriber's terminal quantity, using in the less occasion of fixed telephone subscriber's terminal quantity obviously is a kind of waste.At present, digital radio local telephone network (PHS) net that is commonly referred to as " Personal Handyphone System " on the market is communicated with fixed-line telephone network, and the PHS net is lower than gsm radio phone network operating cost, but phs terminal can only be conversed, picture and text can not be transmitted, fixed telephone terminal equipment can't be replaced.And phs terminal is that single supply is digital, and that landline telephone is a duplicate supply is analog, and bell signal, prompt tone are also different with phs terminal; So fixed telephone terminal equipment can not directly be connected with phs terminal, to realize the fixed-line telephone network wireless access.
Summary of the invention
The utility model aims to provide a kind of calling subscriber terminal and phs terminal of being connected and fixed, the fixed-line telephone network wireless access device that fixed telephone subscriber's terminal is communicated with fixed-line telephone network by the PHS net again.
The purpose of this utility model realizes by following scheme: the fixed-line telephone network wireless access device comprises wave point, fixed network equipment interface, connects above-mentioned two interfaces and information translation is provided and operates the systemic-function control circuit of control and provide galvanic multiple power supplies to them for it.Wave point connects the PHS module that possesses speech conversion communication function and keyboard control function, through PHS Module Links PHS net and connection PSTN net.The fixed network equipment interface is connected and fixed telephone terminal.Described wave point comprise talked about attenuation network, send words impedance inverter circuit, ringing detector and data-transmission channel.Being talked about attenuation network, send the words impedance inverter circuit for the callee mouth of systemic-function control circuit and PHS module with send the words port that voice-frequency channel is provided of wave point, and for they provide impedance matching and signal amplitude adjusting; Ringing detector provides the ring detection signal to the systemic-function control circuit; Data-transmission channel sends to the PHS module with the digital data of the button data such as the other side's telephone number of systemic-function control circuit output; And provide the transmission passage of digital data exchange for systemic-function control circuit and PHS module.The fixed network equipment interface to fixed telephone terminal provide direct current supply and with the voice-frequency channel of systemic-function control circuit, it provides ringing supply to fixed telephone terminal under the control of systemic-function control circuit, it provides fixed telephone terminal off-hook detection signal for the systemic-function control circuit.Described fixed network equipment interface comprises impedance bridge, ringing current generator, ring controller, off hook state detector.Impedance bridge is for the fixed telephone terminal power supply and impedance matching, the off hook signal when it provides the fixed telephone terminal caller for the off hook state detector are provided.Ringing current generator provides the AC signalling signal to the ring controller under the control of systemic-function control circuit.The AC signalling signal loading that the ring controller provides the ring controller under the control of systemic-function control circuit is to fixed telephone terminal, the off hook signal of fixed telephone terminal when it provides for the off hook state detector that fixed telephone terminal is called bell signal.The off hook state detector provides the off hook signal of fixed telephone terminal for the systemic-function control circuit.The systemic-function control circuit comprises chip microprocessor, dtmf decoder, audio frequency two-four lines conversion blender.The dual-tone multifrequency analog data of the button data such as the other side's telephone number that dtmf decoder sends fixed telephone terminal under the control of chip microprocessor converts the accessible digital data of chip microprocessor to, and the effective output of its data sends decoded digital data to the control I/O of chip microprocessor mouth transmission index signal and its data-out port to the data-in port of chip microprocessor I/O mouth when solving effective double-audio signal.Audio frequency two-four lines conversions blender transmits two tone frequency channel wires of fixed telephone terminal and the other side and is talked about line and the bar audio frequency send the conversation of talking about line through two audio frequency of wave point.
The dual-tone multifrequency analog data that the systemic-function control circuit is fixed the button data such as the other side's telephone number that fixed telephone terminal sent behind the off-hook detection signal of telephone terminal caller converts the accessible digital data of chip microprocessor to; Chip microprocessor sends to wave point with above-mentioned digital data, offers the communication link that the PHS module is set up both sides by wave point; Transmit fixed telephone terminal and the other side conversation by audio frequency two-four lines conversions blender through wave point and PHS module.If the on-hook of calling party's fixed telephone terminal makes end of conversation, the systemic-function control circuit sends the on-hook instruction to wave point in the conversation, and then the PHS module sends on-hook signal prompting the other side: fixed telephone terminal is on-hook.If telephone subscriber's on-hook makes end of conversation in the callee PSTN net, then the PSTN net sends the on-hook signal sound and is sent to the fixed telephone terminal prompting by systemic-function control circuit and fixed network equipment interface by wave point through the voice pathway of PHS module: telephone subscriber's on-hook in the PSTN net in the conversation.After the systemic-function control circuit is fixed the called ring detection signal of telephone terminal, the AC signalling signal is provided and controls the ring controller by the crying-stop and at interval the ring controller is provided the AC signalling signal loading to arrive fixed telephone terminal of fixed telephone terminal to the ring controller starting ringing current generator, the off hook signal when the systemic-function control circuit obtains the off hook state detector and provides fixed telephone terminal called then stops the operation of ringing current generator and ring controller; Transmit fixed telephone terminal and the other side conversation by audio frequency two-four lines conversions blender through wave point and PHS module.If the fixed telephone terminal on-hook makes end of conversation, the systemic-function control circuit sends the on-hook instruction to wave point in the conversation, and then the PHS module sends on-hook signal prompting the other side: fixed telephone terminal is on-hook.If telephone subscriber's on-hook makes end of conversation in the calling party PSTN net, then the on-hook signal sound of PSTN net transmission is sent to the fixed telephone terminal prompting through the voice pathway of PHS module by systemic-function control circuit and fixed network equipment interface by wave point: caller phone user on-hook in the PSTN net in the conversation.
In the wave point: talked about attenuation network and connect the four line side callee mouths of audio frequency two-four lines conversion blender and the callee mouth of PHS module respectively; What the four line sides of sending the words impedance inverter circuit to connect audio frequency two-four lines conversions blender were respectively sent words port and PHS module send the words port; Ringing detector connects the bell signal output of PHS module respectively and the ring of chip microprocessor detects input; Data-transmission channel connects the data transmission port of PHS module and the data transmission port of chip microprocessor respectively.In the systemic-function control circuit: the analog input end of dtmf decoder is connected and fixed two tone frequency channel wires of net equipment interface, digital output port connects the data-in port of chip microprocessor I/O mouth, and the effective output of data connects a control input end of chip microprocessor I/O mouth; Audio frequency two line ends of audio frequency two-four lines conversion blender are connected and fixed two tone frequency channel wires of net equipment interface.In the fixed network equipment interface: a side of impedance bridge is connected and fixed two tone frequency channel wires of two tone frequency channel wires formation fixed network equipment interfaces of telephone terminal, the opposite side of impedance bridge connects the 48V power supply port of multiple power supplies, and the fixed line off hook state output port of impedance bridge connects an input port of off hook state detector; The ac output end mouth of ringing current generator connects the ac input end mouth of ring controller, and the ringing-current control input end of ringing current generator connects the ringing-current control output end of chip microprocessor I/O mouth; The ac output end mouth of ring controller is connected and fixed two tone frequency channel wires of telephone terminal, and the PHS off hook state output port of ring controller connects another input port of off hook state detector; The ring control input end of ring controller connects the ring control output end of chip microprocessor I/O mouth; The output of off hook state detector connects the off-hook detection input of chip microprocessor I/O mouth.
The form of the also available keyboard input of this device sends data to the PHS module, the effect that simulation PHS module keyboard is pressed.Described wave point also comprises simulating keyboard; The input port of simulating keyboard connects the button data output port of chip microprocessor I/O mouth, and the output port of simulating keyboard connects the keyboard array input port of PHS module.Chip microprocessor sends to simulating keyboard with the digital data of the button data such as the other side's telephone number that the form of keyboard input sends fixed telephone terminal, delivers to the keyboard input port of PHS module through simulating keyboard.
This device also can send the back information of the other side's telephone number to fixed telephone terminal.The systemic-function control circuit also comprises the FSK encoder; The digital input port of FSK encoder connects a data output port of chip microprocessor I/O mouth, and analog output connects the DTMF data input pin of audio frequency two-four lines conversion blender.Chip microprocessor is transformed to the other side's telephone number the FSK form in the interval of twice ring digital code hand over the FSK coder transitions be the analog signal of FSK form by the modulation of audio frequency two-four lines conversion blender after the fixed network equipment interface sends to fixed telephone terminal, realize incoming call display function.
This device also can send the control signal that public words are chargeed to fixed telephone terminal.Described fixed network equipment interface also includes the antipole controller that the annexation that is connected and fixed two tone frequency channel wires of telephone terminal is exchanged; Two lines of the outside line side of antipole controller are connected and fixed two tone frequency channel wires of telephone terminal respectively, two lines of the interior lines side of antipole controller connect impedance bridge, ring controller, dtmf decoder and audio frequency two-four lines conversion two tone frequency channel wires that blender connect respectively, and the antipole control input end of antipole controller connects the antipole control output end of chip microprocessor.Behind the other side's off-hook, this antipole controller will be connected and fixed the annexation of two tone frequency channel wires of telephone terminal and exchange under the control of chip microprocessor when the fixed telephone terminal caller, charge to realize public words.
Described chip microprocessor has 5 groups of I/O ports; Wherein first group is the digital output port that data-in port connects dtmf decoder, second group is the input port that data-out port connects simulating keyboard, the 3rd group is the antipole control input end that data-out port is connected and fixed the antipole controller of net equipment interface respectively, the ring control input end of ring controller, the ringing-current control input end of ringing current generator, the 4th group of ring detection output that connects the ringing detector of wave point for control I/O mouth respectively, the data-transmission channel of wave point, the effective output of data of the off-hook detection output of fixed network equipment interface and dtmf decoder, the 5th group is the digital input port that data-out port connects the dtmf code device.
Described simulating keyboard is realized by digital matrix switch integrated circuit, the address wire of this digital matrix switch integrated circuit, data wire and chip select line are connected a data bit of the other side's telephone number data output port of chip microprocessor respectively, each line output line and each column output line of this digital matrix switch integrated circuit is connected each row incoming line and Ge Lie incoming line of the keyboard array input port correspondence of PHS module respectively, by the address wire of chip microprocessor to this digital matrix switch integrated circuit, data wire and chip select line write the state of button input on each the row incoming line of keyboard array input port of the output simulation PHS module that data produce and the Ge Lie incoming line.
Described impedance bridge is made up of four resistance and an electric capacity, wherein first resistance and the 3rd resistance are in series, second resistance and the 4th resistance are in series, the other end of the other end of first resistance and second resistance connects respectively to the fixed telephone terminal direct current power source supplying power, and the other end of the other end of the 3rd resistance and the 4th resistance connects two tone frequency channel wires respectively; One of this electric capacity terminates at the tie point of first resistance and the 3rd resistance, and the other end of this electric capacity is connected on the tie point of second resistance and the 4th resistance.
Described ring controller comprises three resistance, an electromagnetic relay and a switch triode; The positive DC power supply of one termination of electromagnetic relay coil, the collector electrode of another termination switch triode; The grounded emitter line of switch triode, base stage constitutes its ring control end connected system function control circuit through first resistance.Two groups of moving contacts of electromagnetic relay connect the external lead-out wire of two interior lines tone frequency channel wires respectively; Normally-closed contact in two groups of fixed contacts of electromagnetic relay connect respectively two interior lines tone frequency channel wires to inside lead; Normally opened contact in two groups of fixed contacts of electromagnetic relay has a ringing current output that connects ringing current generator through second resistance; Another normally opened contact connects the high level end in the fixed telephone terminal direct current power source supplying power; One end of the 3rd resistance connects the low level end in the fixed telephone terminal direct current power source supplying power, and the other end connects another ringing current output of ringing current generator.
Described off hook state detector comprise two voltage comparators and peripheral resistance pressure-dividing network thereof, for to the power source special of fixed telephone terminal direct current power source supplying power dividing potential drop gained and one or.Be connected between the fixed telephone terminal direct current power source supplying power after its first resistance and a voltage stabilizing didoe are in series, the tie point of first resistance and this voltage stabilizing didoe constitutes described power source special.This power source special connects the high level power end of two voltage comparators, connects the low level power end of two voltage comparators to the low level end of fixed telephone terminal direct current power source supplying power; After being in series, second resistance and the 3rd resistance is connected between the low level end and described power source special of fixed telephone terminal direct current power source supplying power, second resistance and the tie point of the 3rd resistance are connected the inverting input of two voltage comparators respectively, as the reference level.The 4th resistance is connected in parallel on the two ends of first resistance in the described impedance bridge with after the 5th resistance is connected, and the 4th resistance and the tie point of the 5th resistance also are connected the in-phase input end of first voltage comparator; First ohmically change in voltage is added to the in-phase input end of first voltage comparator in the impedance bridge behind the 4th resistance and the 5th electric resistance partial pressure, detects the caller off-hook of fixed telephone terminal.The 6th resistance is connected in parallel on the two ends of the 3rd resistance in the described ring controller with after the 7th resistance is connected, and the 6th resistance and the tie point of the 7th resistance also are connected the in-phase input end of second voltage comparator; The 3rd ohmically change in voltage is added to the in-phase input end of second voltage comparator in the ring controller behind the 6th resistance and the 7th electric resistance partial pressure, detects the called off-hook of fixed telephone terminal when bell signal is arranged.Described or door is made up of two diodes and resistance; The output of first voltage comparator connects the anode of the 8th resistance and first diode; The described power source special of another termination of the 8th resistance; The output of second voltage comparator connects the anode of the 9th resistance and second diode; The described power source special of another termination of the 9th resistance; The negative electrode of above-mentioned two diodes is connected and also connects the tenth resistance and constitute the off-hook detection output; The other end of the tenth resistance is connected on the low level end to the fixed telephone terminal direct current power source supplying power.
Fixed-line telephone network wireless access device of the present invention, employing is that the core system function control circuit is connected and fixed net equipment interface and wave point respectively with the chip microprocessor, be connected and fixed telephone terminal by the fixed network equipment interface, connect phs terminal by wave point and realize that both sides' conversation and data transmit.Structure relatively uses telephone exchange and Coordination Treatment machine to want much simple.Because the change of phs terminal occupation mode, become " moving " and be " fixing ", just avoided inhomogeneous, the unsettled inadequate natural endowment of " Personal Handyphone System " microcellulor handover and signal strength spatial distribution, experimental results show that this part can significantly eliminate " disconnected words " and " speech the is ambiguous " phenomenon in the communication process, can be the user high-quality communication service is provided.This device can use according to fixed telephone subscriber's terminal quantity flexible combination, meets fixed-line telephone network especially and lacks line district remain to be installed user and the part pipeline installation is long in time limit, the high section of cost replaces the interim new user's of solution of Telephone Cable landline telephone to be connected to demand in the fixed-line telephone network.Fund input is few, instant effect.
Description of drawings
Fig. 1 is the application system structural representation of the utility model fixed-line telephone network wireless access device.
Fig. 2 is the electrical block diagram of an embodiment of the utility model fixed-line telephone network wireless access device.
Fig. 3 is the circuit theory diagrams of Fig. 2 embodiment main part control board.
Fig. 4 is the circuit theory diagrams of ringing current generator of the fixed network equipment interface of Fig. 2 embodiment.
Fig. 5 is the circuit theory diagrams of antipole controller of the fixed network equipment interface of Fig. 2 embodiment.
Fig. 6 is the main program flow chart of Fig. 2 embodiment.
Fig. 7 is the caller handler program flow diagram of Fig. 2 embodiment.
Fig. 8 is the called handling procedure flow chart of Fig. 2 embodiment.
Fig. 9 is that subroutine flow chart is handled in the conversation of Fig. 2 embodiment.
Embodiment
The application system structure of the utility model fixed-line telephone network wireless access device sees also Fig. 1.This fixed-line telephone network wireless access device comprises wave point 1, fixed network equipment interface 3, connect above-mentioned two interfaces and for they provide information translation and operate the systemic-function control circuit 2 of control and provide galvanic multiple power supplies 4 to them.Wave point 1 connects the PHS module 0 that possesses speech conversion communication function and controlled function, and PHS module 0 is with the base station 61 of wireless mode link PHS net 6, and base station 61 is connected PSTN net 7 by the base station control device 62 of PHS net 6 again with PHS gateway 63.
Systemic-function control circuit 2 is that core connects dtmf decoder, audio frequency two-four lines conversion blender respectively with the chip microprocessor.Dtmf decoder converts the other side's telephone number dual-tone multifrequency analog data that fixed telephone terminal 5 sends to chip microprocessor accessible digital data; Chip microprocessor offers PHS module 0 with the digital data of the other side's telephone number via wave point 1; Audio frequency two-four lines conversion blender transmits fixed telephone terminal 5 and the conversation of the other side through wave point 1 and PHS module 0.
Fixed network equipment interface 3 is connected and fixed telephone terminal 5, to fixed telephone terminal 5 provide direct current supply and with the voice-frequency channel of systemic-function control circuit 2, to providing fixed telephone terminal 5 ringing supplies, it provides the off-hook detection signal of fixed telephone terminal 5 for systemic-function control circuit 2 under the control of systemic-function control circuit 2 for it.
When fixed telephone terminal 5 callers, be fixed net equipment interface 3 of the state of fixed telephone terminal 5 off-hooks detects, and fixed network equipment interface 3 sends the off-hook detection signal of fixed telephone terminal 5 to systemic-function control circuit 2.The other side's telephone number dual-tone multifrequency analog data that systemic-function control circuit 2 sends fixed telephone terminal 5 converts digital data to and sends to wave point 1, wave point 1 sends to PHS module 0 with these data with the form of keyboard input, through PHS module 0 link PHS net 6 set up with wireless mode with PSTN net 7 in telephone subscriber's communication contact.Under callee's situation that the line is busy, systemic-function control circuit 2 and then provide audio frequency two-four lines conversion mixing voice session services through fixed network equipment interface 3 and wave point 1 for fixed telephone terminal 5 and PHS module 0.If 5 on-hooks of calling party's fixed telephone terminal make end of conversation, systemic-function control circuit 3 sends on-hook signal to wave point 1 in the conversation, and then PHS module 0 sends on-hook signal sound prompting the other side: fixed telephone terminal 5 on-hook.If telephone subscriber's on-hook makes end of conversation in the callee PSTN net 7, then PSTN net 7 sends the on-hook signal sound and is sent to fixed telephone terminal 5 promptings by wave point 1 by systemic-function control circuit 2 and fixed network equipment interface 3 through the voice pathway of PHS module 0: telephone subscriber's on-hook in the PSTN net 7 in the conversation.
When fixed telephone terminal 5 was called, PHS module 0 was accepted the calling that PSTN net 7 sends by PHS net 6, and PHS module 0 sends bell signal to wave point 1, and wave point 1 provides the ring detection signal of PHS module 0 to systemic-function control circuit 2.Systemic-function control circuit 3 is sent control command and is started fixed network equipment interface 3, for fixed telephone terminal 5 provides bell signal.After fixed telephone terminal 5 user's off-hooks are answered, systemic-function control circuit 3 is according to the off-hook detection signal of fixed network equipment interface 3, send section bell instruction a stopping ring to fixed network equipment interface 3, send to wave point 1 simultaneously and answer instruction to PHS module 0, caller phone user's communication process in foundation and the PSTN net 7.Systemic-function control circuit 3 provides audio frequency two-four lines conversion mixing voice session services for fixed network equipment interface 3 and wave point 1.If fixed telephone terminal 5 on-hooks make end of conversation, systemic-function control circuit 3 sends on-hook signal to wave point 1 in the conversation, and then PHS module 0 sends on-hook signal sound prompting the other side: fixed telephone terminal 5 on-hook.If telephone subscriber's on-hook makes end of conversation in the calling party PSTN net 7, then PSTN net 7 transmission on-hook signal sounds are fixed telephone terminal 5 promptings by wave point 1 by systemic-function control circuit 2 and fixed network equipment interface 3 through the voice pathway of PHS module 0: caller phone user on-hook in the PSTN net 7 in the conversation.
The circuit structure of a preferred embodiment of the utility model fixed-line telephone network wireless access device sees also Fig. 2.PHS module 0 in the present embodiment has keyboard control function, and it can accept the data and the operational order of key mode input.
Systemic-function control circuit 2 connects dtmf decoder 22, audio frequency two-four lines conversion blender 23, FSK encoder 24 respectively by chip microprocessor 21, also has supervisory circuit 25.The analog input end of dtmf decoder 22 is connected and fixed two tone frequency channel wires of net equipment interface 3, and digital output port connects an I/O port of chip microprocessor 21.Audio frequency two line ends of audio frequency two-four lines conversion blender 23 are connected and fixed two tone frequency channel wires of net equipment interface 3, and audio frequency four line ends connect wave point 1.The digital input port of FSK encoder 24 connects an I/O port of chip microprocessor 21, and analog output connects audio frequency two-four lines conversion blender 23; Be used to realize caller identification.The output of supervisory circuit 25 connects the reset terminal of chip microprocessor 21, and input port connects an I/O end of chip microprocessor 21; With " program fleet " and " deadlock " that prevents chip microprocessor 21.
Fixed network equipment interface 3 is made up of impedance bridge 31, off hook state detector 32, ring controller 33, ringing current generator 34 and antipole controller 30.Two tone frequency channel wires of impedance bridge 31 and ring controller 33 are connected and fixed telephone terminal 5 through antipole controller 30 respectively.Two test sides of impedance bridge 31 and ring controller 33 are connected off hook state detector 32 respectively.Impedance bridge 31 also connects multiple power supplies 4, and it is for fixed telephone terminal 5 power supplies and provide impedance matching, the off hook signal of the off hook signal when not having bell signal when it provides fixed telephone terminal 5 callers for off hook state detector 32 and in the called process.Ringing current generator 34 is by multiple power supplies 4 power supplies, and its AC signal output connects ring controller 33 respectively, makes it start the ringing-current control end connected system function control circuit 2 of work.Ringing current generator 34 provides bell signal to ring controller 33 under the control of systemic-function control circuit 2.Ring controller 33 is by multiple power supplies 4 power supplies, its control end connected system function control circuit 2, the bell signal that it provides ringing current generator 34 under the control of systemic-function control circuit 2 is loaded into fixed telephone terminal 5 through antipole controller 30, and it provides fixed telephone terminal 5 called and off hook signal when bell signal is arranged for off hook state detector 32.Off hook state detector 32 is by multiple power supplies 4 power supplies, and it detects output connected system function control circuit 2, and it provides the off hook signal of fixed telephone terminal 5 for systemic-function control circuit 2.Antipole controller 30 is by multiple power supplies 4 power supplies, its control end connected system function control circuit 2, when fixed telephone terminal 5 callers, the annexation that this antipole controller 30 will be connected and fixed two tone frequency channel wires of telephone terminal 5 behind the other side's off-hook under the control of systemic-function control circuit 2 is exchanged, and charges to realize public words.
The particular circuit configurations of the systemic-function control circuit 2 on the present embodiment main part control board sees also Fig. 3.
The chip microprocessor 21 of present embodiment adopts the high performance W78LE58BP microprocessor chip U8 with 4 groups of 8 I/O ports and one group of 4 I/O port.The external clock circuit of forming by crystal oscillator Y2 and capacitor C 2, C3 of microprocessor chip U8.The A/D conversion of microprocessor chip U8 is predisposed to data output with data I/O mouth P0 and is connected simulating keyboard 13; Low 4 of data I/O mouth P1 are predisposed to data input port connection dtmf decoder 22; In high 4 of data I/O mouth P1 1 is predisposed to power-off signal output/PFO that the data input port connects supervisory circuit 25, has 1 to be predisposed to " feeding dog " input WDI that data output connects supervisory circuit 25 in addition in high 4 of data I/O mouth P1; Low 3 signal input end that are predisposed to ring controller 33, ringing current generator 34 and antipole controller 30 that data output is connected and fixed net equipment interface 3 respectively of address and data I/O mouth P2; The ring that control I/O mouth P3 connects the ringing detector 14 of wave point 1 respectively detects the off-hook detection output of off hook state detector 32 of data transmission port P-RXD, P-TXD, fixed network equipment interface 3 of the data-transmission channel 15 of output, wave point 1 and the effective output INT1 of data, the start-up control end Pwdn of dtmf decoder 22.4 I/O port P4 are predisposed to each numerical data input that data output connects dtmf code device 24.
Audio frequency two-four lines conversions blender 23 is that audio frequency two-four lines conversion hybrid chip U1 and the peripheral circuit thereof of TEA1062A formed by model.The 1st, 9 pin of audio frequency two-four lines conversion hybrid chip U1 are ports of audio frequency two wires side, connect two audio frequency outside lines through capacitance C2, C3; 6th, 7 pin are that four line sides are sent the words port, are connected with the words impedance inverter circuit 12 of sending of wave point 1; 4th, 9 pin are four line side callee mouths, link with the attenuation network 11 talked about of wave point 1; The 11st pin is the DTFM input, is connected with the analog output of dtmf code device 24.+ 12V direct current is received 1 pin of audio frequency two-four lines conversion hybrid chip U1 through playing the inductance L 1 that directly acts on every traffic, connects feeder ear VCC the 13rd pin of audio frequency two-four lines conversion hybrid chip U1 again through resistance R 18.9 pin of audio frequency two-four lines conversion hybrid chip U1 meet the ground wire GND1 on the control board.Be connected in parallel on the 1st, 9 pin of audio frequency two-four lines conversion hybrid chip U1 after two voltage stabilizing didoe DZ2, the DZ4 differential concatenation, realize double limiting.Make audio frequency two-four lines conversion hybrid chip U1 not adopt the outside line power supply, with the influence that guarantees that operating state is not changed by loop current.One end of resistance R 17 connects 1 pin of audio frequency two-four lines conversion hybrid chip U1, and the other end connects resistance R 19 and capacitor C 20; The other end of capacitor C 20 connects 10 pin of audio frequency two-four lines conversion hybrid chip U1; The other end of resistance R 19 connects resistance R 20, R21; Ground wire GND1 on another termination control board of resistance R 20; Meet the ground wire GND1 on the control board behind the other end series resistor R22 of resistance R 21.The signal that the inhibition electric bridge that the equiva lent impedance of resistance R 18, R17, R19, R20, R21, R22 and circuit is formed can be sent the audio frequency two wires here is realized anti-sidetone function entering the 32dB that decays before being talked about amplifier.The AGC that one end of resistance R 23 connects audio frequency two-four lines conversion hybrid chip U1 holds the 15th pin, and the ground wire GND1 on another termination control board is used for realizing the automatic gain control of about 6 dB.Resistance R 21 also connects capacitor C 16 with the tie point of resistance R 22, and the other end of capacitor C 16 connects 2 pin of audio frequency two-four lines conversion hybrid chip U1; And meet ground wire GND1 on the control board through capacitor C 13.Be connected to resistance R 14 between 2 pin of audio frequency two-four lines conversion hybrid chip U1 and 4 pin.The network scalable four line sides that capacitor C 16, C13 and resistance R 14 are formed are sent the gain of words port.Capacitor C 17 and resistance R 7 are connected in parallel between the 4th, 5 pin of audio frequency two-four lines conversion hybrid chip U1 jointly, and the 5th foot meridian capacitor C14 of audio frequency two-four lines conversion hybrid chip U1 meets the ground wire GND1 on the control board.The gain of the network scalable four line side callee mouths that capacitor C 17, C14 and resistance R 7 are formed.The value of resistance R 22 will influence gain, the gain of dtmf code device 24, circuit gain control characteristic, sidetone level, audio frequency two-four lines conversion hybrid chip U1 the 1st pin output voltage swing and the characteristic of low voltage of four line side callee mouths.
In the present embodiment, the effect of the FSK encoder 24 in the systemic-function control circuit 2 is: the digital calling party's that chip microprocessor 21 is extracted telephone number data converts fsk data to and is transported to audio frequency two-four lines conversion blender 23; In the interval twice ring under the control of chip microprocessor 21, the other side's telephone number is sent to fixed telephone terminal 2 in the mode of FSK through fixed network equipment interface 3, realize incoming call display function.FSK encoder 24 is finished the inverse process of dtmf decoder 22, the FSK coded format code that will be processed into by microprocessor chip U8 the digital signal of PHS module 0 output carries out the D/A conversion, hands over audio frequency two-four lines conversion hybrid chip U1 modulation to produce 5 receptible analog quantity FSK format signals of fixed telephone terminal.It forms digital input circuit by the non-essential resistance network R41～R48 on the output port P4 that is connected on microprocessor chip U8, form analog output circuit by potentiometer RW3, capacitor C 35, constitute DTFM input the 11st pin that analog output is connected audio frequency two-four lines conversion hybrid chip U1 through lotus root and capacitor C 40.Four resistance R 47, R48, R44, R46 are connected in series in proper order, and the other end of resistance R 47 connects resistance R 41, potentiometer RW3, capacitor C 35, and the other end of resistance R 46 connects the ground wire GND2 on the control board.The other end of potentiometer RW3, capacitor C 35 also all connects the ground wire GND2 on the control board.FSK1 end on the output port P4 of resistance R 41 other ends connection microprocessor chip U8.The tie point of resistance R 47, R48 also is connected to resistance R 42, the FSK2 end on the output port P4 of resistance R 42 other ends connection microprocessor chip U8.The tie point of resistance R 44, R48 also is connected to resistance R 43, the FSK3 end on the output port P4 of resistance R 43 other ends connection microprocessor chip U8.The tie point of resistance R 44, R46 also is connected to resistance R 45, the FSK4 end on the output port P4 of resistance R 45 other ends connection microprocessor chip U8.The travelling arm of potentiometer RW3 constitutes DTFM input the 11st pin that analog output is connected audio frequency two-four lines conversion hybrid chip U1 through lotus root and capacitor C 40.
The particular circuit configurations of the wave point 1 of present embodiment sees also Fig. 3.
The attenuation network 11 of being talked about of wave point 1 is made up of potentiometer RW2, capacitor C 7, C32, C39 and resistance R 6.4 pin of four line side callee mouth U1 of audio frequency two-four lines conversion blender 23 and the transmission signal of 9 pin output stand to talk about callee mouth P-MIC+ and the P-MIC-that attenuation network 11 is added in PHS module 0.Capacitor C 32 and resistance R 6 meet the callee mouth P-MIC+ of PHS module 0; The callee mouth P-MIC-of another termination PHS module 0 of capacitor C 7 and resistance R 6.The travelling arm of another termination potentiometer RW2 of capacitor C 32.The end of another termination potentiometer RW2 of capacitor C 7 and the positive pole of capacitor C 39, the negative pole of capacitor C 39 connect 9 pin of four line side callee mouth U1 of audio frequency two-four lines conversion blender 23.4 pin of four line side callee mouth U1 of another ending connecting audio two-four lines conversion blender 23 of potentiometer RW2.
Send words impedance inverter circuit 12 to form by potentiometer RW1, resistance R 11, R12, R34.The P-SPK+ terminating resistor R11 and the resistance R 34 of sending the words port of PHS module 0, the other end of P-SPK-terminating resistor R12 and resistance R 34.The other end of resistance R 11, R12 respectively connects the fixed arm of potentiometer RW1, resistance R 12 is sent 6 pin of talking about port U1 with four line sides of audio frequency two-four lines conversion blender 23 that the tie point of potentiometer RW1 fixed arm also is connected, and the travelling arm of potentiometer RW1 connects four line sides of audio frequency two-four lines conversion blender 23 and send 7 pin of talking about port U1.
Simulating keyboard 13 is realized by the combination of two digital matrix switch integrated circuit U2, U3 and pull-up resistor row RP1 and driver U7C.Two digital matrix switch integrated circuit U2, U3 respectively number identical address wire corresponding connect and 0～3 of the corresponding respectively data-out port P0 that connects microprocessor chip U8 in data bit and a termination in 1～4 end of pull-up resistor row RP1; The data wire of two digital matrix switch integrated circuit U2, U3 is connected, and connects the output of driver U7C; The data bit 7 of the data-out port P0 of the input connection microprocessor chip U8 of driver U7C and 7 ends of pull-up resistor row RP1; The chip select line of digital matrix switch integrated circuit U2 connects the data bit 5 of microprocessor chip U8 data-out port P0 and 5 ends of pull-up resistor row RP1; The chip select line of digital matrix switch integrated circuit U3 connects the data bit 6 of microprocessor chip U8 data-out port P0 and 6 ends of pull-up resistor row RP1.Respectively number the corresponding alignment of keyboard array input port of corresponding connection of identical column output line and difference PHS module 0 in four column output lines of two digital matrix switch integrated circuit U2, U3; Four line output lines of digital matrix switch integrated circuit U2 connect the corresponding line of keyboard array input port of PHS module 0 respectively; Digital matrix switch integrated circuit U3 four line output lines in the 5th line that connects the keyboard array input port of PHS module 0.Digital matrix switch integrated circuit U2 provides the output of 4 lines and 4 alignments for the keyboard array input port of PHS module 0; Digital matrix switch integrated circuit U3 provides the output of 1 line and 4 alignments for the keyboard array input port of PHS module 0; Write data by microprocessor chip U8 to address wire, data wire and the chip select line of two digital matrix switch integrated circuit U2, U3, the state of button input on each row incoming line of the keyboard array input port of the output simulation PHS module 0 of generation and the Ge Lie incoming line.
The P-RXD of data-transmission channel 15, P-TXD line connect P3 mouth RXD, the TXD position of data transmission port RX, TX position and the microprocessor chip U8 of PHS module 0 respectively, finish the transfer of data of both bidirectional linked list patterns.Data content has microprocessor chip U8 to issue the loopback information of the action directive of PHS module 0, command execution situation that PHS module 0 is returned and sends to the talking state data of microprocessor chip U8.
The particular circuit configurations of the various piece of the fixed network equipment interface 3 of present embodiment sees also Fig. 3, Fig. 4 and Fig. 5.
Off hook state detector 32 is mainly that form or form by diode D12, D13 and resistance R 5 by two voltage comparator U4A, U4B and peripheral resistance pressure-dividing network thereof and one.Off hook state detector 32 is by-48V DC power supply; Resistance R 25 and 15V voltage stabilizing didoe DZ1 be serially connected in 0V and-the 48V power supply between, through resistance R 25 dividing potential drops, it is two voltage comparator U4A, U4B and or door power supply that voltage stabilizing didoe DZ1 voltage stabilizing becomes the 15V voltage difference with-48V power supply.Resistance R 55, R54 be connected on-48V power supply and 15V power supply between, the tie point of resistance R 55, R54 also connects the inverting input of two voltage comparator U4A, U4B.-48V power supply and 15V power supply divide the inverting input that is crimped onto two voltage comparator U4A, U4B by resistance R 55, R54, as the reference level.After 51 series connection of resistance R 49 and resistance R, be connected in parallel on the two ends of resistance R 1 in the impedance bridge 31, resistance R 49 and the tie point of resistance R 51 also are connected the in-phase input end of voltage comparator U4A.Change in voltage in the impedance bridge 31 on the resistance R 1 is added to the in-phase input end of voltage comparator U4A after resistance R 49 and resistance R 51 dividing potential drops, when detecting the caller of fixed telephone terminal 5 and off hook state called and when not having bell signal.After 49 series connection of resistance R 50 and resistance R, be connected in parallel on the two ends of resistance R 27 in the ring controller 33, resistance R 50 and the tie point of resistance R 49 also are connected the in-phase input end of voltage comparator U4B.Change in voltage in the ring controller 33 on the resistance R 27 is added to the in-phase input end of voltage comparator U4B after resistance R 50 and resistance R 49 dividing potential drops, detect the called off-hook of fixed telephone terminal 5 when bell signal is arranged.The output of voltage comparator U4A connects the anode of resistance R 35 and diode D12; Another termination 15V power supply of resistance R 35.The output of voltage comparator U4B connects the anode of resistance R 53 and diode D13; Another termination 15V power supply of resistance R 53.The negative electrode of two diode D12, D13 is connected and also connects the anode of light-emitting diode among resistance R 5 and the photoelectric coupling circuit U5; Another termination-48V power supply of resistance R 5.Connect-the 48V power supply behind the light-emitting diode D5 of an indication of the negative electrode of light-emitting diode serial connection fixed telephone terminal 5 off hook states among the photoelectric coupling circuit U5.The emitter of phototriode meets the ground wire GND2 on the control board among the photoelectric coupling circuit U5, and current collection is the off-hook detection output very, and meets the DC power supply VCC of microprocessor chip U8 through resistance R 29.The variation of two voltage comparator U4A, U4B output state through diode D12, D13 and resistance R 5 that form or door by photoelectric coupling circuit U5 output off-hook detection signal.Photoelectric coupling circuit U5 realizes the isolation with microprocessor chip U8 DC loop.
The oscillator LM1 that input isolation circuit that ringing current generator 34 is made up of photoelectric coupling circuit U11 and switch triode Q2 and model are LRS15-48S75 constitutes.The emitter of switch triode Q2 meets the negative electrode of light-emitting diode among capacitor C 101, resistance R 102, the photoelectric coupling circuit U11 and the ground wire GND2 on the control board; The base stage connecting resistance R101 of switch triode Q2 and the other end of resistance R 102; The other end of resistance R 101 links to each other with the other end of capacitor C 101, constitutes the ringing-current control input end and links to each other with the ringing-current control output end of microprocessor chip U8; The collector electrode of switch triode Q2 connects the anode of light-emitting diode among the photoelectric coupling circuit U11, and connects+the 5V power supply after being connected in series a resistance R 103.The emitter of phototriode connects-negative power end the 2nd pin and chassis end the 3rd pin of 48V DC power supply and oscillator LM1 among the photoelectric coupling circuit U11; The collector electrode of phototriode connects control input end the 4th pin of oscillator LM1.Positive power source terminal the 1st pin of oscillator LM1 connects the 0V power supply.Two ringing current output the 5th pin of oscillator LM1 link to each other with two ringing-current inputs of ring controller 33 respectively with the 6th pin.Oscillator LM1 produces the standard bell signal of 75V25Hz by-48V DC power supply, and loop current is 50mA.The base stage of switch triode Q2 obtains the ringing-current control signal of microprocessor chip U8 through resistance R 101, under the effect of this control signal, switch triode Q2 conducting, then 4 pin through photoelectric coupling circuit U11 oscillator LM1 obtain starting command, and 5,6 pin of oscillator LM1 are outwards exported ringing current; If switch triode Q2 ends, then the outlet side of photoelectric coupling circuit U11 ends, and 4 pin of oscillator LM1 obtain shutdown command, and 5,6 pin of oscillator LM1 stop outwards to export ringing current.
Galvanic multiple power supplies 4 is provided, sees also Fig. 3.Multiple power supplies 4 comprises-48V and 0V ,+12V ,+DC power supply of 5V and ground wire GND two standard sets.For improving the required low pressure voltage stabilizing efficient of systemic-function control circuit 2, control board is provided with plate and carries stabilized voltage power supply.It is that low pressure difference linearity integrated regulator U9, the filter T1 of CX1117-ADJ and common mode disturbances that capacitor C 9, C10 form suppress output voltage dividing potential drop feedback circuit and filter capacitor C26, C23 that circuit, resistance R 36, R37 and capacitor C 39 form and form generation 3.8V～4.0V low-tension supply VCC by model that this plate carries stabilized voltage power supply.This plate carries stabilized voltage power supply can effectively eliminate the phase mutual interference that produces by public power supply.All used LC to move back the lotus root circuit to the bigger device feeder ear of power consumption, and will be referred to separating with ground wire GND2, the signal ground of control board to external signal as the ground wire GND1 of PHS module 0, the employing inductance is isolated, and the interference that forms by common impedance is had the good restraining effect.
Program flow diagram below in conjunction with operation in the chip microprocessor 21 of present embodiment illustrates the operating process of present embodiment.
The main program flow chart of the chip microprocessor 21 of present embodiment is seen Fig. 6.The laggard main program 40 of going into of starting shooting.Step 41, system initialization promptly are provided with each I/O port of microprocessor chip U8 by the explanation that has made the front, and output port is inserted initial value.Step 42, PHS module initialization are promptly carried out initialization setting and start operation by the use regulation of PHS module 0 to PHS module 0.Step 42 is extracted the return information that PHS module 0 is split machine operation, judges whether the 0 start operation of PHS module is successful.Successful then enter the major cycle of step 100.In this major cycle, step 101, the fixed telephone terminal 5 off-hook detection signals that monitoring fixed network equipment interface 3 provides judge whether fixed telephone terminal 5 has the caller off-hook; Be that then the alternation of hosts cries and handles 50.Not, then enter step 102, the bell signal that the telephone subscriber in the PSTN net 6 that monitoring wireless interface 1 provides sends judges whether PHS module 0 has called terminal ringing; Be then to change called processing 80.Not, then enter step 103, supervisory circuit 25 is made dog feeding operation, return the major cycle of step 100 then.
The flow chart of the caller handler program 50 of the chip microprocessor 21 of present embodiment is asked for an interview Fig. 7.In the caller handler program, step 51, the fixed telephone terminal 5 off-hook detection signals that monitoring fixed network equipment interface 3 provides are judged whether on-hook of fixed telephone terminal 5.Be then to change step 64 and carry out that The Calling Party Hooks On and handle.Not, then enter step 52, microprocessor chip U8 sends control level to dtmf decoder makes DTMF decoding chip U6 receive the other side's telephone number of the audio frequency of fixed telephone terminal 5 transmissions.Step 53 is all removed the state of pressing for no button with each bar output of simulating keyboard 13.Step 54 transmits passage 15 by the PHS module data and transmits off hook signal to PHS module 0.Step 55, the digital the other side's telephone number and the storage of reading in DTMF decoding chip U6 output are finished by a succession of interrupt handling routine section, when DTMF decoding chip U6 solved effective double-audio signal in the other side's telephone number, its reverse out gate U7A provided external interrupt signal one time just for microprocessor chip U8.Microprocessor chip U8 responds interrupt signal, calls the interrupt handling routine section, reads in the decoded coded data of DTMF decoding chip U6 output, and deposits it in deposit the other side's telephone number memory cell.Step 56 transmits passage 15 by the PHS module data and checks whether PHS module 0 transmits the backward signalling sound.Step 57 is done displacement output with the memory cell of the other side's telephone number.Step 58 judges whether this position be moved out of is effective numeral or character, if effectively numeral or character, the number of memory cell of just representing the other side's telephone number is for sending.Step 59 hands over the simulating keyboard 13 of wave point 1 to send to PHS net 6 through PHS module 0 this effective numeral that just shifted out or character.Step 60 judges that the PHS module data transmits whether the backward signalling sound that passage 15 transmits PHS module 0 is busy tone.Step 61 transmits passage 15 by the PHS module data and checks whether PHS module 0 transmits the other side's off hook signal.Step 62 is sent the antipole control level to the antipole controller 30 of fixed network equipment interface 3, and the annexation of two tone frequency channel wires of fixed telephone terminal 5 is exchanged.Step 63 is called conversation and is handled subprogram 70, returns the step 100 of main program then.Step 64 enters that The Calling Party Hooks On and handles, and microprocessor chip U8 stops to send control level to dtmf decoder makes DTMF decoding chip U6 no longer receive the audio-frequency information that fixed telephone terminal 5 sends.Step 64 transmits passage 15 by the PHS module data and transmits off hook signal to PHS module 0, returns the step 100 of main program then.
The called handling procedure flow chart of the chip microprocessor 21 of present embodiment is asked for an interview Fig. 8.In called handling procedure, step 81, the fixed telephone terminal 5 off-hook detection signals that monitoring fixed network equipment interface 3 provides are judged whether off-hook of fixed telephone terminal 5.Be then to change step 88 and carry out called off-hook processing.Not, then enter step 82 and carry out ring transmission processing.Step 82 checks whether the ringing-current tag unit is set in the internal memory, whether has entered operating state to judge ringing current generator 34.Step 83 with ringing-current tag unit set in the internal memory, sends the ringing-current control level to ringing current generator 34, makes ringing current generator 34 enter operating state.Step 84 sends the ring control signal to ring the mode of stopping 4 seconds in 1 second to ring controller 33.Step 85 transmits the telephone subscriber of passage 15 from the PSTN7 net that PHS module 0 transmits telephone number cid data by the PHS module data, and deposits the other side's telephone number memory cell in the internal memory in.Step 86, cid data to the other side's telephone number memory cell in the internal memory is shifted, one of whenever shifting out is carried out the conversion of FSK form and send FSK encoder 24 to carry out the D/A conversion, send to fixed telephone terminal 5 after handing over audio frequency two-four lines conversion hybrid chip U1 modulation, after the content of the other side's telephone number memory cell is moved sky, return step 80.Step 87 sends the ring control signal to ring the mode of stopping 4 seconds in 1 second to ring controller 33, returns step 80.Step 88 resets ringing-current tag unit in the internal memory, stops to send the ringing-current control levels to ringing current generator 34, makes ringing current generator 34 state of deactivating.Step 89, the simulating keyboard 13 by wave point 1 transmits the off-hook command signal to PHS module 0.Step 90 is called conversation and is handled subprogram 70, returns the step 100 of main program then.
The flow chart of subprogram 70 is handled in the conversation of the chip microprocessor 21 of present embodiment, asks for an interview Fig. 9.In the conversation handling procedure 70, step 71, the fixed telephone terminal 5 off-hook detection signals that monitoring fixed network equipment interface 3 provides are judged whether on-hook of fixed telephone terminal 5.Be then to change step 74 and carry out fixed telephone terminal 5 on-hooks processing.Not, then enter step 72, transmit passage 15 by the PHS module data and check whether PHS module 0 transmits the other side's on-hook signal.Be then to return in the program of calling it.Not, then enter step 73, both sides are carrying out the fixed telephone terminal 5 and the conversation of the other side through wave point 1 by audio frequency two-four lines conversion hybrid chip U1 transmission, and time-delay a period of time keeps conversation and makes dog feeding operation.Step 74, fixed telephone terminal 5 on-hook, the simulating keyboard 13 by wave point 1 transmits on-hook signal to PHS module 0, returns then in the program of calling it.
The function that possesses the foregoing description just can be completely achieved the conversation of fixed telephone subscriber's terminal and the ability of fax sending and receiving.If remove antipole controller 30, will give up public words billing function; Perhaps remove simulating keyboard 13, then be confined to use the PHS module 0 that does not possess keyboard control function; Perhaps remove FSK encoder 24, will give up incoming call display function; The formed different embodiment of omission and so on still belong to fixed-line telephone network wireless access device of the present utility model.The utility model fixed-line telephone network wireless access device, can use according to fixed telephone subscriber's terminal quantity flexible combination, for example, the control board of a plurality of foregoing embodiment is respectively connected a PHS module and a fixed telephone terminal, and a shared cover multiple power supplies and the ringing current generator of these a plurality of control boards, certainly, the control input end that the ringing-current control output signal of systemic-function control circuit on these a plurality of control boards should be received this ringing current generator after logical "or" is handled.
Claims (9)
1. fixed-line telephone network wireless access device is characterized in that: comprise wave point (1), fixed network equipment interface (3), connect above-mentioned two interfaces and information translation is provided and operates the systemic-function control circuit (2) of control and provide galvanic multiple power supplies (4) to them for it; Wave point (1) connects the PHS module (0) that possesses speech conversion communication function and controlled function, links PHS net (6) and connects PSTN net (7) through PHS module (0); Fixed network equipment interface (3) is connected and fixed telephone terminal (5); Described wave point (1) comprise talked about attenuation network (11), send words impedance inverter circuit (12), ringing detector (14) and data-transmission channel (15); Systemic-function control circuit (2) comprises chip microprocessor (21), dtmf decoder (22), audio frequency two-four lines conversion blender (23); Described fixed network equipment interface (3) comprises impedance bridge (31), ringing current generator (34), ring controller (33), off hook state detector (32); Talked about attenuation network (11) and connected the four line side callee mouths of audio frequency two-four lines conversion blenders (23) and the callee mouth of PHS module (0) respectively; What the four line sides of sending words impedance inverter circuits (12) to connect audio frequency two-four lines conversions blenders (23) were respectively sent words port and PHS module (0) send the words port; Ringing detector (14) connects the bell signal output of PHS module (0) respectively and the ring of chip microprocessor (21) detects input; Data-transmission channel (15) connects the data transmission port of PHS module (0) and the data transmission port of chip microprocessor (21) respectively; The analog input end of dtmf decoder (22) is connected and fixed two tone frequency channel wires of net equipment interface (3), digital output port connects the data-in port of chip microprocessor (21) I/O mouth, and the effective output of data connects a control input end of chip microprocessor (21) I/O mouth; Audio frequency two line ends of audio frequency two-four lines conversion blenders (23) are connected and fixed two tone frequency channel wires of net equipment interface (3); One side of impedance bridge (31) is connected and fixed two tone frequency channel wires of two tone frequency channel wires formation fixed network equipment interfaces (3) of telephone terminal (5), the opposite side of impedance bridge (31) connects the 48V power supply port of multiple power supplies (4), and the fixed line off hook state output port of impedance bridge (31) connects an input port of off hook state detector (32); The ac output end mouth of ringing current generator (34) connects the ac input end mouth of ring controller (33), and the ringing-current control input end of ringing current generator (34) connects the ringing-current control output end of chip microprocessor (21) I/O mouth; The ac output end mouth of ring controller (33) is connected and fixed two tone frequency channel wires of telephone terminal (5), and the PHS off hook state output port of ring controller (33) connects another input port of off hook state detector (32); The ring control input end of ring controller (33) connects the ring control output end of chip microprocessor (21) I/O mouth; The output of off hook state detector (32) connects the off-hook detection input of chip microprocessor (21) I/O mouth.
2. fixed-line telephone network wireless access device according to claim 1 is characterized in that: described PHS module (0) has keyboard control function; Described wave point (1) also comprises simulating keyboard (13); The input port of simulating keyboard (13) connects the button data output port of chip microprocessor (21) I/O mouth, and the output port of simulating keyboard (13) connects the keyboard array input port of PHS module (0).
3. fixed-line telephone network wireless access device according to claim 2 is characterized in that: systemic-function control circuit (21) also comprises FSK encoder (24); The digital input port of FSK encoder (24) connects a data output port of chip microprocessor (21) I/O mouth, and analog output connects the DTMF data input pin of audio frequency two-four lines conversion blenders (23).
4. fixed-line telephone network wireless access device according to claim 3 is characterized in that: described fixed network equipment interface (3) also includes the antipole controller (30) that the annexation that is connected and fixed two tone frequency channel wires of telephone terminal (5) is exchanged; Two lines of the outside line side of antipole controller (30) are connected and fixed two tone frequency channel wires of telephone terminal (5) respectively, two lines of the interior lines side of antipole controller (30) connect two tone frequency channel wires that impedance bridge (31), ring controller (33), dtmf decoder (22) and audio frequency two-four lines conversion blenders (23) are connect respectively, and the antipole control input end of antipole controller (30) connects the antipole control output end of chip microprocessor (21).
5. fixed-line telephone network wireless access device according to claim 4 is characterized in that: described chip microprocessor (21) has 5 groups of I/O ports; Wherein first group is the digital output port that data-in port connects dtmf decoder (22), second group is the input port that data-out port connects simulating keyboard (13), the 3rd group is the antipole control input end that data-out port is connected and fixed the antipole controller (30) of net equipment interface (3) respectively, the ring control input end of ring controller (33), the ringing-current control input end of ringing current generator (34), the 4th group of ring detection output that connects the ringing detector (14) of wave point (1) for control I/O mouth respectively, the data-transmission channel (15) of wave point (1), the effective output of data of the off-hook detection output of fixed network equipment interface (3) and dtmf decoder (22), the 5th group is the digital input port that data-out port connects dtmf code device (24).
6. fixed-line telephone network wireless access device according to claim 1, it is characterized in that: described impedance bridge (31) is made up of four resistance and an electric capacity, wherein first resistance and the 3rd resistance are in series, second resistance and the 4th resistance are in series, the other end of the other end of first resistance and second resistance connects respectively to fixed telephone terminal (5) direct current power source supplying power, and the other end of the other end of the 3rd resistance and the 4th resistance connects two tone frequency channel wires respectively; One of this electric capacity terminates at the tie point of first resistance and the 3rd resistance, and the other end of this electric capacity is connected on the tie point of second resistance and the 4th resistance.
7. fixed-line telephone network wireless access device according to claim 6 is characterized in that: described ring controller (33) comprises three resistance, an electromagnetic relay and a switch triode; The positive DC power supply of one termination of electromagnetic relay coil, the collector electrode of another termination switch triode; The grounded emitter line of switch triode, base stage constitutes its ring control end connected system function control circuit (2) through first resistance; Two groups of moving contacts of electromagnetic relay connect the external lead-out wire of two interior lines tone frequency channel wires respectively; Normally-closed contact in two groups of fixed contacts of electromagnetic relay connect respectively two interior lines tone frequency channel wires to inside lead; Normally opened contact in two groups of fixed contacts of electromagnetic relay has a ringing current output that connects ringing current generator (34) through second resistance; Another normally opened contact connects the high level end in fixed telephone terminal (5) direct current power source supplying power; One end of the 3rd resistance connects the low level end in fixed telephone terminal (5) direct current power source supplying power, and the other end connects another ringing current output of ringing current generator (34).
8. fixed-line telephone network wireless access device according to claim 7 is characterized in that: described off hook state detector (32) comprise two voltage comparators and peripheral resistance pressure-dividing network thereof, for to the power source special of fixed telephone terminal (5) direct current power source supplying power dividing potential drop gained and one or; After being in series, its first resistance and a voltage stabilizing didoe be connected between fixed telephone terminal (5) direct current power source supplying power, the tie point of first resistance and this voltage stabilizing didoe constitutes described power source special, this power source special connects the high level power end of two voltage comparators, connects the low level power end of two voltage comparators to the low level end of fixed telephone terminal (5) direct current power source supplying power; Be connected between the low level end and described power source special of fixed telephone terminal (5) direct current power source supplying power after second resistance and the 3rd resistance are in series, second resistance and the tie point of the 3rd resistance are connected the inverting input of two voltage comparators respectively; The 4th resistance is connected in parallel on the two ends of first resistance in the described impedance bridge (31) with after the 5th resistance is connected, and the 4th resistance and the tie point of the 5th resistance also are connected the in-phase input end of first voltage comparator; The 6th resistance is connected in parallel on the two ends of the 3rd resistance in the described ring controller (33) with after the 7th resistance is connected, and the 6th resistance and the tie point of the 7th resistance also are connected the in-phase input end of second voltage comparator; Described or door is made up of two diodes and resistance; The output of first voltage comparator connects the anode of the 8th resistance and first diode; The described power source special of another termination of the 8th resistance; The output of second voltage comparator connects the anode of the 9th resistance and second diode; The described power source special of another termination of the 9th resistance; The negative electrode of above-mentioned two diodes is connected and also connects the tenth resistance and constitute the off-hook detection output; The other end of the tenth resistance is connected on the low level end to fixed telephone terminal (5) direct current power source supplying power.
9. fixed-line telephone network wireless access device according to claim 2, it is characterized in that: described simulating keyboard (13) is realized by digital matrix switch integrated circuit, each address wire of this digital matrix switch integrated circuit, each data wire and chip select line are connected a data bit of the button data output port of chip microprocessor (21) I/O mouth respectively, and each line output line and each column output line of this digital matrix switch integrated circuit is connected each row incoming line and Ge Lie incoming line of the keyboard array input port correspondence of PHS module respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038519 CN2682758Y (en) | 2004-02-10 | 2004-02-10 | Wireless access device for fixed telephone network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038519 CN2682758Y (en) | 2004-02-10 | 2004-02-10 | Wireless access device for fixed telephone network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2682758Y true CN2682758Y (en) | 2005-03-02 |
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ID=34607629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420038519 Expired - Fee Related CN2682758Y (en) | 2004-02-10 | 2004-02-10 | Wireless access device for fixed telephone network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2682758Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338921C (en) * | 2005-09-02 | 2007-09-19 | 东南大学 | Comprehensive accessing device for isomerized network environment and method for realizing same |
| CN107959897A (en) * | 2017-12-12 | 2018-04-24 | 太仓鼎诚电子科技有限公司 | Off host with dial feature amplifies intercommunication telephone communication system |
-
2004
- 2004-02-10 CN CN 200420038519 patent/CN2682758Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338921C (en) * | 2005-09-02 | 2007-09-19 | 东南大学 | Comprehensive accessing device for isomerized network environment and method for realizing same |
| CN107959897A (en) * | 2017-12-12 | 2018-04-24 | 太仓鼎诚电子科技有限公司 | Off host with dial feature amplifies intercommunication telephone communication system |
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