CN103118199A - Mobile phone based fixed telephone interface system - Google Patents
Mobile phone based fixed telephone interface system Download PDFInfo
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- CN103118199A CN103118199A CN2013100524002A CN201310052400A CN103118199A CN 103118199 A CN103118199 A CN 103118199A CN 2013100524002 A CN2013100524002 A CN 2013100524002A CN 201310052400 A CN201310052400 A CN 201310052400A CN 103118199 A CN103118199 A CN 103118199A
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Abstract
The invention belongs to the technical field of communication equipment, and particularly discloses a mobile phone based fixed telephone interface system. The mobile phone based fixed telephone interface system comprises a mobile phone central controller 1, a mobile phone dialing circuit 2, a fixed telephone interface system 3 and a charge control circuit 4, wherein the mobile phone based fixed telephone interface system has two work modes below: a mobile phone work mode and a fixed telephone work mode; that is to say, when the interface system is disconnected to a telephone line of a fixed telephone, the mobile phone is in a mobile phone work mode, is automatically connected to a mobile communication network, is used like a common mobile phone, and is charged according to the fee of the mobile communication; and when the interface system is connected to the telephone line of the fixed telephone, the mobile phone is automatically switched into the fixed telephone work mode to play the role of a common fixed telephone, and is charged according the fee of a common fixed telephone. The mobile phone based fixed telephone interface system in such the design can be widely applied to various mobile phones, and has the advantages of being realized easily, switched automatically, practical in functions, low-carbon and environment-friendly, strong in transportability and the like.
Description
Technical field
The invention belongs to the communication apparatus technical field, be specifically related to a kind of interface system of the fixed line based on mobile phone.
Background technology
Along with the fast development of mobile communications industry, the update of mobile phone is more and more faster, in order to follow the fashion and novel capabilities, the cycle of changing new cell-phone shortens gradually, only even be short to every 1 year to half a year, and the mobile phone that is replaced is large multi-functional intact, is just given it up.Yet make a mobile phone, need to expend many resources, comprise rare metal, oil, water source etc.Due to the each side reason, the recycling of mobile phone and recycling are also not universal, high expensive simultaneously.The resource cost that frequent replacing mobile phone causes does not meet the theory of " green, low-carbon (LC), environmental protection ".Therefore, how to utilize the intact idle mobile phone of these performances significant.
Along with the progressively reduction of the universal and rate of mobile phone, in family, the status of landline telephone and effect are little by little replaced, the landline telephone market shrink.The fierce impact of mobile communication product on the one hand, the use of landline telephone itself inconvenience on the other hand is the main cause that causes this trend.
Summary of the invention
The object of the present invention is to provide the fixed line interface system based on mobile phone that a kind of cost is low, function is strong, easy to use.
Fixed line interface system based on mobile phone provided by the invention, its composition comprises mobile phone central controller, handset dialing circuit, landline telephone interface circuit and charging control circuit; Can there be two kinds of mode of operations in the bright system of we:
Mode of operation one: when the landline telephone interface circuit was not connected and fixed the telephone wire of phone, mobile phone was in the mobile phone mode of operation, and the mobile communications network that can certainly be dynamically connected carries out charging according to the mobile communication rate.The use that is operated in mobile phone under this kind state and regular handset is as broad as long, and the original various functions of mobile phone all can be used.
Mode of operation two: when the landline telephone interface circuit connected the telephone wire of upper landline telephone, mobile phone can detect automatically, and switches to the landline telephone mode of operation, can automatically be connected and fixed telephone transmission network, carries out charging according to the normal telephone rate.The mobile phone that is operated under this kind state is played the part of the role of normal telephone, the receiver of mobile phone and microphone are completed respectively receiver and the transmitter function of normal telephone, the dialing keyboard of mobile phone or touch-screen are completed the dialing keyboard function of normal telephone, the display screen of mobile phone is completed the display screen functions of normal telephone, the dial key of mobile phone is completed the handoff functionality of normal telephone, the on-hook key of mobile phone is completed the on-hook function of normal telephone, and the ringing circuit of mobile phone is completed the ringer function of normal telephone.Under this external hook state, the original various functions of mobile phone all can be used.
When fixation phone line access landline telephone interface circuit, the landline telephone interface circuit produces " telephone wire has connected signal ", and send this to the mobile phone central controller and connected signal, the mobile phone central controller is by the pattern switching control program, mobile phone is switched to the landline telephone mode of operation, and send related command to the handset dialing circuit, according to the telephone number that the user is dialled on mobile phone, the handset dialing circuit produces and exports the dial impulse of mobile phone; The dial impulse of mobile phone convert the dial impulse that meets the landline telephone characteristic index to, then the fixed line dial impulse after changing sends to telephone exchange by the landline telephone transmission line by the driving of this landline telephone interface circuit.So just completed mobile phone and carried out the function of speed dialling and calling under the landline telephone mode of operation.
Described charging control circuit comprises charging detecting circuit, charging drive circuit, battery power detection circuit and charge protector;
During we are bright, be provided with the charging voltage comparator in described landline telephone interface circuit, should be at 3.7 ~ 6.3 volts when in general the charging voltage of mobile phone is normal, when this interface circuit is connected and fixed the telephone wire of phone, at first interface system changes into charging voltage with the direct voltage of telephone line line end, send into described charging voltage comparator, the charging voltage comparator can judge whether this charging voltage is normal; Also be provided with the cell voltage comparator in the fixed line interface circuit, this cell voltage comparator can compare cell voltage and the normal voltage of mobile phone, judge whether battery of mobile phone normally is connected on mobile phone, and judge that simultaneously what scope battery of mobile phone voltage belongs to, and is sent to charging control circuit with compare result signal.
In the present invention, described charging control circuit sends the charging request signal to the mobile phone central controller, and the mobile phone central controller can be lighted the mobile phone backlight lamp after receiving the charging request signal, and output data-driven mobile phone screen shows the information that battery is charging.
When having connected the telephone wire of landline telephone, the landline telephone interface circuit of mobile phone can also provide following functions:
Function one: when will be when the landline telephone mode of operation dials, by this interface circuit, the address list of having stored in can calling mobile phone be completed speed dialling as mobile phone.
Function two: when interface circuit is connected and fixed the telephone wire of phone, the electric energy that mobile phone can utilize telephone wire to provide, be fixed the conversation under the phone works pattern, can also charge to battery of mobile phone simultaneously, can't satisfy the Current Situation of long-time standby with the battery capacity of alleviating smart mobile phone.
Provided by the invention based on mobile phone landline telephone interface system, be easy to realize, automatically switch, practical function, low-carbon environment-friendly, portable strong, can be widely used on various cell phones.
By the bright interface system of we, can repack landline telephone into by the idle mobile phone that family's performance is intact, perhaps can no longer be equipped with special landline telephone in family, and adopt mobile phone " to hold a concurrent post ".In addition, when interface system was connected and fixed the telephone wire of phone, the electric energy that mobile phone can utilize telephone wire to provide was conversed, and can also charge to battery of mobile phone, can't satisfy the problem of long-time standby with the battery capacity of alleviating current smart mobile phone.
Description of drawings
Fig. 1 is based on the workflow diagram of the landline telephone interface system of mobile phone.
Fig. 2 GSM mobile handset theory diagram.
Fig. 3 landline telephone communication system schematic diagram.
Fig. 4 fixed telephone composition frame chart.
Fig. 5 landline telephone detailed block diagram.
The workflow diagram that Fig. 6 dials under the landline telephone mode of operation
Embodiment
(1) based on the landline telephone interface system workflow of mobile phone
Because the cell phone specifications parameter is different, the standard of the electrical parameter on the outside line of various places is also different, so the landline telephone interface that is used for mobile phone needs the electrical parameter of matching shift mobile phone and outside line, to guarantee normal operation, improve transplantability and the robustness of this interface system.The workflow diagram of mobile phone landline telephone interface system as shown in Figure 1.
(2) mobile phone mode of operation
When interface system was not connected and fixed the telephone wire of phone, mobile phone was in the mobile phone mode of operation, and the mobile communications network that can certainly be dynamically connected carries out charging according to the mobile communication rate.The use that is operated in mobile phone under this kind state and regular handset is as broad as long, and the original various functions of mobile phone all can be used.
Because the principle that is in mobile phone under the mobile phone mode of operation and regular handset is as broad as long, herein only take GSM mobile handset as example, the operation principle of mobile phone under brief description mobile phone mode of operation.
The summary of operating handset principle
GSM adopts the FDMA(frequency division multiple access) with the TDMA(time division multiple access) a kind of communication technology that standard combines, the different frequencies of user time-sharing use all in its network communicate.In the GSM900 frequency range, the frequency range of 25MHz is divided into 124 different channels, and each channel width is 200KHz, and each channel contains 8 time slots, namely the GSM900 frequency range in the same area, can be simultaneously for 1000 users nearly.The theory diagram of GSM mobile handset as shown in Figure 2.
The circuit structure of mobile phone
The circuit structure of mobile phone can be divided into five parts: wireless portion, transmission process part, interface section, power unit, control section.Its circuit theory can be summarized as the two large divisions: radio circuit and baseband circuit.
2.2.1 wireless portion
Wireless portion comprises the high frequency such as antenna loop, transmission, reception, modulation /demodulation and oscillator system.Wherein transmitting portion is comprised of radio-frequency power amplifier, band pass filter, receiving unit is comprised of High frequency filter, High frequency amplification, frequency conversion and intermediate-frequency filter, modulator-demodulator adopts GMSK(Gaussian Filtered Minimum Shift Keying, Gaussian-filtered minimum shift keying).
2.2.2 transmission process
The processing of A sendaisle comprises that speech coding, chnnel coding, encryption, tdma frame form.
1) speech coding: user's speech changes into the signal of telecommunication by microphone, and this signal of telecommunication changes into the information flow of 13Kbitps numeral, that represent voice by analog/digital converter.
2) chnnel coding: even to correct in order detecting the mistake that produces between transmission period, introduce redundant code in data flow, improve its speed by it is calculated that the information that obtains from information source number.The result of chnnel coding is a streams of code words.
3) interweave: the bit of several code words is mixed, and making in modulated signal mutually, close bit can expand on several code words.Because the possibility of makeing mistakes continuously in modulated stream is closely related, and due to after mistake is by decorrelation, the chnnel coding performance can be improved, and the purpose that interweaves is exactly to remove the correlation of mistake and their positions in code word, after interweaving, information flow has just become the sequence of block of information.
4) burst format: for helping to receive the synchronous and balanced of signal, increase some binary messages in the block of information of encrypting and make it become the binary message piece.
5) encrypt: by the cipher mode of only being known by travelling carriage and base transceiver station, revise the content of these block of informations.
6) modulation: use the GMSK modulation technique, carve in due course the analog signal that digital signal is changed into suitable frequency; Then by the processing of radio circuit, launch with the form of radio wave.
The processing of B receive path comprises equilibrium, channel separation, deciphering, channel-decoding and tone decoding.
1) demodulation: radio wave by antenna reception after, receiver receives corresponding information according to multiple access rule.Under the help of the additional information of introducing during the burst format, this part signal is carried out demodulation, result is the sequence of binary message piece.
2) equilibrium: the purpose that adopts equalizing demodulation is to proofread and correct the radio signal distortion that causes because of complex-terrain.
3) deciphering: revise these bits by the method opposite with encryption.
4) deinterleave: in order to rebuild code word, the bit of different bursts is put back to original position.
5) channel-decoding: utilize additional redundant code, detect or correct possible mistake in demodulator output, recover information source information from the output of demodulator.
6) tone decoding: by the decoder digital/analog converter, digital speech information is reduced into the voice signal of simulation.
2.2.3 interface section
The interface section comprises analog voice interface, digital interface and three parts of man-machine interface.Analog voice interface comprises analog/digital converter, digital/analog converter, microphone and loud speaker, and digital interface is mainly the digital terminal adapter, and man-machine interface is mainly display and keyboard.
2.2.4 power unit
Power unit comprises battery directly circuit and the battery-powered circuit that converts each road direct voltage by special-purpose integrated power supply IC to of power supply.
2.2.5 control section
Control section carries out control and management to mobile phone.Comprise timing controlled, digital system control, antenna system control and man-machine interface control etc.If mobile phone adopts frequency hopping, also should comprise the control to frequency hopping.Controller adopts microprocessor.
Mobile phone enters channel procedure
Regular handset itself is the receiving and transmitting signal machine of a duplex system.In communication, mobile phone and base station exchange information, every mobile phone will take a pair of duplexing transceiver channel, and each base station is provided with the multichannel transceiver channel.
According to the busy extent of call business, operator has been each base station assigns a series of channel.The channel of base station can be divided into Traffic Channel (voice channel) and broadcast channel (control channel).Utilize Traffic Channel to transmit voice signal in mobile communication system, come the transfer control signal with broadcast channel.Because the control signal type that transmits is more, broadcast channel can also continue segmentation.For example transmit synchronizing signal and just be called synchronizing channel, transmit call request signal and just be called permission access channel.
Broadcast channel broadcasting shared carrier frequency frequency of when broadcasting, is exactly the dominant frequency of base station.The mobile phone of One's name is legion has entered broadcast channel at stand-by state, listens to as broadcast messages such as network label, base station identity codes.Get ready to go into action in hundreds because broadcast channel has, the cell phone of every local area is all waited in broadcast channel, the common channel so broadcast channel is otherwise known as.Although the mobile subscriber of One's name is legion is arranged, because these users do not take broadcast channel, so the frequency band that broadcast channel takies is narrower under broadcast channel.
Traffic Channel will take wider frequency range, has distributed a series of receiving and transmitting signal channel in this frequency range.For example the bandwidth in GSM regulation receiving and transmitting signal radio station is 200KHz, in Traffic Channel, can set one every 200KHz and receive or the emission channel.The quantity of reception and emission channel has determined the message capacity of base station.The cell phone that Traffic Channel only allows conversing enters, and is at ordinary times idle condition, the idle channel so Traffic Channel is otherwise known as.
After mobile phone power-on, its inner frequency synthesizer (being also referred to as phase-locked loop) is started working, and from the low frequency end to the high-frequency end scanning channel, namely searches for broadcast channel.In search procedure, may run into several broadcast channels, mobile phone can be according to the field intensity size of the broadcast channel that searches, automatically rest on the strongest broadcast channel of field intensity, receive the information that this broadcast channel is broadcast, as the network label of system, base station identity code, frequency correction information, synchronizing information, base station field intensity etc.Mobile phone is through identification, if the base station in present networks, the frequency of mobile phone just is locked on the frequency of this base station.
After mobile phone is realized Frequency Locking, can open sender, send out a string signal to the base station, be called the networking request signal.This signal has comprised phone number, fuselage device number, PIN etc., for the SIM(Subscriber Identity Module of base station to mobile phone, client identification module) block and make the identity confirmation.If be validated user through discriminating, just this mobile phone can be logined networking, on the display screen of mobile phone, " China Mobile ", " CHINAUNICOM " or printed words such as " China Telecom " can appear.At this moment mobile phone enters stand-by state, continues the broadcasting of broadcast listening channel, and broadcast channel does not stop to broadcast circularly above-mentioned information.All mobile phones in this base station coverage area scope are all waited in broadcast channel, this namely broadcast channel be known as the reason of common channel.
When mobile phone was initiated main exhaling, the broadcast channel of base station was received call request, and the base station just can be voice channel of this handset allocation.Specifically, the broadcast channel of base station sends the coding of a string relevant voice channel, after mobile phone is received, through the central processing unit decoding in mobile phone, control the interior phase-locked loop of mobile phone and automatically change frequency, until the frequency alignment of mobile phone the frequency of this voice channel, mobile phone just is transferred on the voice channel of base station assigns by broadcast channel.
When the mobile phone that is in stand-by state was exhaled, the broadcast channel of base station sent call information from paging channel.After mobile phone was received call information, the response that makes a call on Random Access Channel required the base station assigns voice channel.At this moment, the broadcast channel of base station can send the coding of relevant voice channel, and through the central processing unit decoding in mobile phone, the phase-locked loop of controlling mobile phone constantly changes frequency automatically, mobile phone is transferred on the voice channel of base station assigns, and it is identical that this process is initiated main exhaling with mobile phone.
No matter be that mobile phone is initiated main exhaling or called, just withdraw from from voice channel after talk-through, enter broadcast channel and wait for, and continue to monitor the information that broadcast channel is broadcast, exhale or exhaled and prepare for initiation is main again.
The mobile phone speech communication steps
Mobile phone speech communication comprises following step:
1. people's sound changes into the voice signal of simulation by microphone;
2. the voice signal of simulation changes into digital signal;
3. digital signal converts radiofrequency signal to;
4. radiofrequency signal is transmitted by electromagnetic wave;
5. convert radiofrequency signal to digital signal at receiving terminal;
6. digital signal is reduced into the voice signal of simulation;
7. the voice signal of simulation transforms by loud speaker the sound that the adult can hear.
(3) landline telephone mode of operation
When interface system connected the telephone wire of upper landline telephone, mobile phone can detect automatically, and switches to the landline telephone mode of operation, can automatically be connected and fixed telephone transmission network, carries out charging according to the normal telephone rate.
The summary of landline telephone Principle of Communication
Landline telephone communication is to utilize the signal of telecommunication to transmit saying of the people sound of living, landline telephone communication system schematic diagram as shown in Figure 3, this system is comprised of terminal equipment, transmission line and three parts of telephony switching gear.
When the speaker of transmitting terminal talked before transmitter, speaker's sound wave effect made transmitter circuit produce corresponding electric current change on the vibrating diaphragm of transmitter, and this electric current that changes with sound wave is called words stream for short.Words stream is sent in the receiver of distant terminal equipment through transmission line and telephone exchange.After receiver receives the signal of telecommunication, just it is converted to acoustic vibration, sends in the ear of hearer through the propagation of air.Simplified summary, landline telephone communication is to change voice signal into the signal of telecommunication at transmitting terminal, delivers to receiving terminal by transmission line by way of telephony switching gear, receiving terminal is reduced to voice signal with the signal of telecommunication again.
The composition of fixed telephone:
The landline telephone that now uses in the family is substantially all automatic telephone, i.e. route selection in the switched connection process, the action such as take out stitches are automatically completed by switch fully, and do not needed manual operation.
Automatic telephone mainly is comprised of ringing circuit, dial-up circuit and speaking circuit three parts.The composition frame chart of fixed telephone as shown in Figure 4.The detailed block diagram of landline telephone as shown in Figure 5.
3.2.1 the ringing circuit of fixed telephone
Switch is connected the called subscriber with regard to control circuit after receiving dialing signal, be that 25Hz, voltage peak are the AC signalling signal of 90V from the called landline telephone phone of trend frequency of delivery simultaneously.In the landline telephone phone, can receive ringing signal, and with the device that tone calling user off-hook is replied, be called ringer, usually also be referred to as telephone ringer.
3.2.2 the dial-up circuit of fixed telephone
The formation of A dial impulse
When pressing keyboard and dialling, the dialing integrated circuit produces pulse control signal and makes pulse switch pipe alternately cut-off, conducting, so form the dial impulse signal.
The characteristic requirements of B dial impulse
Pulse characteristic is to weigh the leading indicator of keypad electric property, and three characteristic requirements commonly used are as follows.
1) pulse rate: be called again pulse frequency, it refers to the pulse number that dialer sends each second, and organization is " pulse/sec ".Be calibration pulse speed according to national Specification 10pps.
2) impulse make ratio: be illustrated in the pulse period time of pulse switch management and control phone processed loop disconnection
With closing time
Ratio, commonly used
Expression, its definition is:
According to national standard, during dialing, the break-make ratio of pulse is 1.5 ± 0.2: 1.
3) the impulse-train pause time: when the pulse signal ends of previous number, after needing certain interval of time, the pulse signal of next number just begins to send, usually calling the impulse-train pause time this interval time.The General Requirements impulse-train pause time is not less than 350ms.
Concrete pulse signal technical indicator is as shown in the table:
3.2.3 the speaking circuit of fixed telephone
Switch is connected the called subscriber with regard to control circuit, and is that 25Hz, voltage peak are the AC signalling signal of 90V to called landline telephone phone frequency of delivery after receiving dialing signal.After called landline telephone switch on, formally connect with caller landline telephone phone by switch, two fixed telephones are realized conversation, and realize that the circuit of conversation just is called telephone circuit.
3.2.4 the DC power-supply circuit of fixed telephone
Basic demand following points to the fixed telephone power supply:
1) in two input lines that require telephone set and the situation that outside line is connected arbitrarily, fixed telephone can work, the impact of the polarity of not powered.
2) when pulse dialing, the direct-current working volts and the electric current that require to offer integrated circuit are basicly stable.
3) the Power supply loop can be protected overvoltage, large electric current.
4) with the fixed telephone of memory function under the on-hook powering-off state, the dormancy power supply can be provided for the memory of integrated circuit.
5) require to reduce significantly the AC impedance of transmission feeder to voltage stabilizing and the filtering of direct voltage, otherwise dial-up signal and voice signal are shunted.
Specifically, can add the polarity orientation circuit before the fixed telephone circuit, can be transformed to the uncertain input voltage of polarity that polarity is fixed, voltage in the right direction.Outside line is because Distribution Area is wider, the also more complicated of environment of process, often may be subject to the intrusion of high pressure.Therefore, must have over-voltage protection function as the fixed telephone of telephone network terminal, make the telephone set components and parts can trouble free service.In the button fixed telephone, generally carry out superpotential protection with voltage-stabiliser tube and piezo-resistance.
Be in the operating state of mobile phone under the landline telephone mode of operation
when interface system connects the telephone wire of upper landline telephone, operating handset is under the landline telephone mode of operation, this moment, mobile phone was played the part of the role of normal telephone, the on-hook key of mobile phone is completed the on-hook function of normal telephone, the ringing circuit of mobile phone is completed the ringer function of normal telephone, the dial key of mobile phone is completed the handoff functionality of normal telephone, the receiver of mobile phone and microphone are completed respectively receiver and the transmitter function of normal telephone, the dialing keyboard of mobile phone or touch-screen are completed the dialing keyboard function of normal telephone, the display screen of mobile phone is completed the display screen functions of normal telephone.Under this external hook state, the original various functions of mobile phone all can be used.
The operating state that is operated in the mobile phone under the landline telephone mode of operation has following several:
3.3.1 on-hook operating state
Mobile phone is pressed on-hook key, and be equivalent to the normal telephone machine and do not take off handle this moment, and the DC channel of outside line can be cut off.This moment, the power supply loop direct current of mobile phone was zero, and the terminals direct voltage remains on 60V(or 48V).
3.3.2 receive the bell signal operating state
When switch generation AC signalling signal, and after mobile phone was sent in outside line, ringing signal can be coupled to the ringing circuit of mobile phone, and sent the tinkle of bells, and the prompting user has incoming call.
3.3.3 off-hook operating state
Mobile phone is pressed dial key, and be equivalent to the normal telephone machine and mention telephone handle this moment, and the switch hook closing of contact forms DC channel, has the direct current of tens milliamperes to fail to be convened for lack of a quorum by dial-up circuit and the speaking circuit of mobile phone.
3.3.4 conversation operating state
When conversation, the cellphone subscriber produces words stream signal facing to the microphone speech of mobile phone, and words stream signal sends the other side through speaking circuit, dial-up circuit and the switch hook of mobile phone to by outside line.The other side's words stream signal is sent into mobile phone by outside line, drives the receiver sounding of mobile phone through speaking circuit.Simultaneously, can complete hand-free function under the landline telephone operating state with the hand-free function of mobile phone.
3.3.5 dial-up operating state
When the user stirred dial pad for mobile phones or touch-screen, the dial-up circuit of mobile phone sent the dial-up signal to outside line, need to satisfy equally concrete pulse signal technical indicator.
(4) the interface system utility function that can provide
When having connected the telephone wire of landline telephone, the landline telephone interface system of mobile phone can also provide following utility function:
4.1 utility function one: the address list of having stored in calling mobile phone carries out speed dialling
Utility function one: in the time will dialling under the landline telephone mode of operation, by this interface system, the address list of having stored in can calling mobile phone finds the wherein telephone number of storage, directly carries out speed dialling and calling by dial key.
Come memory communicating record with the form of database in mobile phone, specifically, the record of each in database has comprised the fields such as contact person's name, fixed telephone number, phone number, E-mail address, personal information.Certainly some field is not inputted relevant information because of the user in cell phone address book, but empty.
when the operating handset that has connected this interface system during in the landline telephone mode of operation, the user enters cell phone address book, find by phonetic or stroke mode and want the object conversed, directly press the dial key on mobile phone, the object information of conversing this moment is transmitted to cell phone system software, so systems soft ware can be recorded database by entry communication, according to the conversation object information of selecting, find corresponding that record of contact person, send its contact method (determining it is fixed telephone number or phone number according to this selection of user) to the mobile phone central controller with signal form, cell phone controller sends related command again to the dial-up circuit of mobile phone, produce the dial impulse of mobile phone.The dial impulse of mobile phone is by the driving of this interface system, convert the dial impulse that meets the landline telephone characteristic index to, fixed line dial impulse after changing again sends to telephone exchange by the landline telephone transmission line, the function of having carried out speed dialling and calling with regard to having completed the address list stored in the calling mobile phone like this.Concrete workflow diagram as shown in Figure 6.
Utility function two: utilize the electric energy that telephone wire provides that battery of mobile phone is charged
Utility function two: when interface system is connected and fixed the telephone wire of phone, the electric energy that mobile phone can utilize telephone wire to provide, be fixed the conversation under the phone works pattern, can also charge to battery of mobile phone simultaneously, can't satisfy the Current Situation of long-time standby with the battery capacity of alleviating smart mobile phone.
Every mobile phone has the charging control signal of a correspondence, controls charging circuit and charges the battery.And the charging circuit of mobile phone generally is comprised of four partial circuits:
1. charging detecting circuit: whether insert mobile phone charging interface for detection of charger.
2. charging drive circuit: be used for controlling external power supply and charge to battery of mobile phone.
3. battery power detection circuit: for detection of what of charge capacity.When battery was full of, testing circuit can send to logic control circuit the signal of " charging is completed ", and logical circuit is controlled charging circuit and disconnected, and stops charging process.
4. charge protector.
The workflow that this utility function is concrete is:
1. when this interface system is connected and fixed the telephone wire of phone, at first interface system changes into charging voltage with the direct voltage of telephone line line end, send into a voltage comparator in mobile phone, voltage comparator can judge this charging voltage whether normal (when in general, this charging voltage is normal should between 3.7 to 6.3 volts).
2. the mobile phone voltage comparator compares cell voltage and several normal voltage, judges whether battery normally is connected on mobile phone, judges on the other hand what scope this cell voltage belongs to, and comparative result is sent in charging control circuit on the one hand.
3. through the detection of over-voltage comparator, if determine that charging voltage is normal, battery is connected with mobile phone normally and after cell voltage belongs to normal range (NR), charging control circuit sends the charging request signal to the mobile phone central controller, the mobile phone central controller can be lighted the mobile phone backlight lamp after receiving the charging request signal, and output data-driven mobile phone screen shows the information that battery is charging.
4. when battery power detection circuit detected cell voltage lower than 2.5 volts, this moment, mobile phone acquiescence battery was in unactivated state, and mobile phone central controller controls charging circuit is filled with anode with faint electric current, slowly with battery activated.
5. cell voltage detected greater than 2.5 volts when battery power detection circuit, but during less than 4.2 volts, mobile phone central controller output control signal starts charging circuit battery is charged.Be divided into again " constant current charge " and " constant voltage charge " two stages during charging.In " constant current charge " stage, mobile phone charges to battery with the large electric current near 600 milliamperes all the time, and this moment, the voltage of battery rose gradually, after rising to certain numerical value, cell voltage just is fixed up and no longer changes, and enter " constant voltage charge " stage this moment, and charging current begins to descend gradually.
6. when detecting charging current, battery power detection circuit finally drops to 20 milliamperes, can send to the mobile phone central controller signal of " battery electric quantity is full ", after the mobile phone central controller is received this signal, the order that meeting is sent charge closing to control circuit, mobile phone stops charging, and shows the information indicating user of " battery is full of " on the mobile phone display screen curtain.
When interface system connected the telephone wire of upper landline telephone, mobile phone was in the landline telephone mode of operation, carries out charging according to the normal telephone rate, in some cases, with respect to the cell phone rate, or wanted cheap.
Claims (5)
1. a landline telephone interface system that is used for mobile phone, is characterized in that its composition comprises: mobile phone central controller, handset dialing circuit, landline telephone interface circuit and charging control circuit; There are two kinds of mode of operations in this system:
Mode of operation one: when the landline telephone interface circuit was not connected and fixed the telephone wire of phone, mobile phone was in the mobile phone mode of operation, and the mobile communications network that can certainly be dynamically connected carries out charging according to the mobile communication rate;
Mode of operation two: when the landline telephone interface circuit connected the telephone wire of upper landline telephone, mobile phone detected automatically, and switches to the landline telephone mode of operation, and automatically is connected and fixed telephone transmission network, carries out charging according to the normal telephone rate.
2. the landline telephone interface system for mobile phone according to claim 1, it is characterized in that when fixation phone line access landline telephone interface circuit, the landline telephone interface circuit produces " telephone wire has connected signal ", and send this to the mobile phone central controller and connected signal, the mobile phone central controller is by the pattern switching control program, mobile phone is switched to the landline telephone mode of operation, and send related command to the handset dialing circuit, according to the telephone number that the user is dialled on mobile phone, the handset dialing circuit produces and exports the dial impulse of mobile phone; The dial impulse of mobile phone convert the dial impulse that meets the landline telephone characteristic index to, then the fixed line dial impulse after changing sends to telephone exchange by the landline telephone transmission line by the driving of this landline telephone interface circuit.
3. the landline telephone interface system for mobile phone according to claim 1, is characterized in that described charging control circuit comprises charging detecting circuit, charging drive circuit, battery power detection circuit and charge protector.
4. the landline telephone interface system for mobile phone according to claim 1, is characterized in that being provided with in described landline telephone interface circuit charging voltage comparator and cell voltage comparator; When this interface circuit was connected and fixed the telephone wire of phone, at first interface circuit changed into charging voltage with the direct voltage of telephone line line end, sent into described charging voltage comparator, and the charging voltage comparator judges whether this charging voltage is normal; Described cell voltage comparator compares cell voltage and the normal voltage of mobile phone, judges whether battery of mobile phone normally is connected on mobile phone, and judges that simultaneously what scope battery of mobile phone voltage belongs to, and is sent to charging control circuit with compare result signal.
5. the landline telephone interface system for mobile phone according to claim 1, it is characterized in that described charging control circuit sends the charging request signal to the mobile phone central controller, the mobile phone central controller can be lighted the mobile phone backlight lamp after receiving the charging request signal, and output data-driven mobile phone screen shows the information that battery is charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100524002A CN103118199A (en) | 2013-02-18 | 2013-02-18 | Mobile phone based fixed telephone interface system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100524002A CN103118199A (en) | 2013-02-18 | 2013-02-18 | Mobile phone based fixed telephone interface system |
Publications (1)
| Publication Number | Publication Date |
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| CN103118199A true CN103118199A (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100524002A Pending CN103118199A (en) | 2013-02-18 | 2013-02-18 | Mobile phone based fixed telephone interface system |
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| US20040097198A1 (en) * | 2002-11-18 | 2004-05-20 | E-Lead Electronic Co., Ltd. | Voice-enabled mobile phone fixed line conversion apparatus |
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| CN1877946A (en) * | 2005-07-01 | 2006-12-13 | 曹先国 | Secondary battery protective chip |
| CN200973164Y (en) * | 2006-07-28 | 2007-11-07 | 康佳集团股份有限公司 | Mobile phone compatible hand-free telephone |
| CN101207866A (en) * | 2006-12-20 | 2008-06-25 | 吕定姿 | Mobile phone or PDA capable of using fixation phone line |
| CN201282176Y (en) * | 2008-08-20 | 2009-07-29 | 信息产业部电信传输研究所 | Control device for charging mobile telephone set |
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- 2013-02-18 CN CN2013100524002A patent/CN103118199A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040097198A1 (en) * | 2002-11-18 | 2004-05-20 | E-Lead Electronic Co., Ltd. | Voice-enabled mobile phone fixed line conversion apparatus |
| CN1877946A (en) * | 2005-07-01 | 2006-12-13 | 曹先国 | Secondary battery protective chip |
| CN1838680A (en) * | 2006-03-21 | 2006-09-27 | 北京三桥科技有限公司 | Terminal device for making radio communication and fixed communication integration and its using method |
| CN200973164Y (en) * | 2006-07-28 | 2007-11-07 | 康佳集团股份有限公司 | Mobile phone compatible hand-free telephone |
| CN101207866A (en) * | 2006-12-20 | 2008-06-25 | 吕定姿 | Mobile phone or PDA capable of using fixation phone line |
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Application publication date: 20130522 |