CN108513023B - Method for realizing analog telephone service suitable for high-speed copper wire access - Google Patents
Method for realizing analog telephone service suitable for high-speed copper wire access Download PDFInfo
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- CN108513023B CN108513023B CN201810200741.2A CN201810200741A CN108513023B CN 108513023 B CN108513023 B CN 108513023B CN 201810200741 A CN201810200741 A CN 201810200741A CN 108513023 B CN108513023 B CN 108513023B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/026—Arrangements for interrupting the ringing current
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Abstract
The invention discloses a method for realizing analog telephone service suitable for high-speed copper wire access, which comprises the following steps: selecting a voice direct current signaling transmission path according to whether the CPE performs reverse feeding or not by using the relay as a selection switch; when the CPE is not back-fed: the standard voice direct current signaling is directly transmitted through a telephone line, controls the telephone to generate ringing, reverse polarity, stop ringing or stop reverse polarity according to the voice direct current signaling, and reports and detects the events of off-hook and on-hook of the telephone; when the CPE is back-fed: the POTS adapter module is used for converting voice direct current signaling into a waveform signal with a user-defined frequency for transmission, and controlling the telephone to generate ringing, inverting, stop ringing or inverting according to the waveform signal with the user-defined frequency, and simulating off-hook and on-hook events to be reported to the PBX. The invention successfully solves the problem that the analog voice signaling cannot be normally transmitted due to the influence of the backward feed in the G.FAST system by using the POTS adapter module, and has strong operability and flexible adaptability.
Description
Technical Field
The invention relates to the field of coaxial cable access in a G.FAST (high-speed copper wire access technology) system, in particular to a method for realizing analog telephone service suitable for high-speed copper wire access.
Background
Fast is a high-speed copper line access technology, designed based on short-range line usage, that can further increase line rates compared to VDSL2 vectoring technology. Fast adopts time division multiplexing (TDD) technology to allocate uplink and downlink bandwidths, has an operating frequency spectrum of 2.2M-106MHz, supports telephone line reverse feeding technology (RPF for short), and has the characteristics of high speed, compatibility, flexible bandwidth, low power consumption, expandability and easy networking. By means of the extremely-fast broadband capability provided by the G.FAST, an operator can get rid of the shackle that the optical fiber must be deployed to the home of a user originally, and the fiber-to-the-home service is easily realized, so that the service operator is helped to economically and effectively accelerate the fiber-to-the-home deployment.
Fig. 1 is an application scenario of an existing g.fast system, where a DPU (Distributed Processing Unit) is connected to a Passive Optical Network (PON) and an FXO (foreign exchange Office) interface, the PON is connected to an ODN (Optical Network Unit) and carries data (including voice traffic carried over the PON); the FXO interface is accessed to PSTN (Public switched telephone Network) to carry voice service. The DPU is connected to FXS (Foreign exchange station) interface, PHONE and CPE (Customer premise equipment) via RJ11 line. When networking deployment is performed, because the installation position of the DPU is difficult to take electricity, a feeder device is usually placed at a position near the CPE or inside the CPE in the home of an access user, and the DPU equipment is supplied with Power by the CPE, that is, by Reverse Power Feed (RPF).
In the above scenario, the POTS and the RPF share the same wire pair, so that the Telephone dc signaling cannot be transmitted through the same pair of Telephone lines.
Disclosure of Invention
The technical problem to be solved by the invention is that in the existing G.FAST system, the analog voice signaling can not be normally transmitted due to the influence of backward feeding.
In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a method for implementing an analog telephone service suitable for high-speed copper wire access, including:
relays are respectively arranged in an FXO unit and an FXS unit of the POTS adapter module, and the relays are used as selection switches to select a voice direct-current signaling transmission path according to whether the CPE performs reverse feeding or not;
when the CPE is not back-fed:
the standard voice direct current signaling is directly transmitted through a telephone line, controls the telephone to generate ringing, reverse polarity, stop ringing or stop reverse polarity according to the voice direct current signaling, and reports and detects the events of off-hook and on-hook of the telephone;
when the CPE is back-fed:
the POTS adapter module is used for converting voice direct current signaling into a waveform signal with a user-defined frequency for transmission, and controlling the telephone to generate ringing, inverting, stop ringing or inverting according to the waveform signal with the user-defined frequency, and simulating off-hook and on-hook events to be reported to the PBX.
In the above method, when the CPE is not back-fed:
the relays in the FXO unit and the FXS unit are released, the direct current path is communicated, standard voice direct current signaling is directly transmitted through a telephone line, the telephone is controlled to generate ringing, reverse polarity, stop ringing or reverse polarity according to the voice direct current signaling, and the telephone is reported to detect the events of off-hook and on-hook of the telephone;
when the CPE is back-fed:
the relay in FXO unit and FXS unit is closed, the direct current path is cut off, the power feed enters POTS adapter module, the POTS adapter module converts the voice direct current signaling into waveform signal with self-defined frequency for transmission, and controls the telephone to generate ringing, reverse polarity, stop ringing or reverse polarity according to the waveform signal with self-defined frequency, and simulate the events of off-hook and on-hook to report to PBX.
In the above method, when the power feed enters the POTS adapter module, the FXO unit and the FXS unit of the POTS adapter module enter the operating state, which specifically includes:
respectively initializing an FXO unit and an FXS unit;
the FXO unit detects ringing and reverse-pole signals, converts the ringing and reverse-pole signals into waveform signals with custom frequency and transmits the waveform signals to the FXS unit; the FXS unit controls ringing, inverting, stopping ringing or inverting of the telephone according to the waveform signal of the custom frequency;
in the other direction, the FXS unit detects off-hook and on-hook signals of the telephone, converts the off-hook and on-hook signals into waveform signals with self-defined frequency and informs the signals to the FXO unit; and the FXO unit simulates off-hook and on-hook events according to the waveform signal of the user-defined frequency and reports the off-hook and on-hook events to the PBX.
In the method, the relay is a low-power-consumption relay with 12V and 36mW, and the working current is 3 mA.
In the above method, the initializing the FXO unit specifically includes the following steps:
step S11, after the FXO unit is powered on, important pin definition of GPIO is set;
step S12, setting a delay of 100ms to ensure that the set pin attribute definition takes effect;
s13, resetting a voice chip in the FXO unit;
step S14, delaying for 500 ms;
step S15, judging whether the acquired voice chip type meets the type matching requirement, if so, executing step S16; otherwise, go to step S17;
step S16, performing conventional register configuration on the voice chip through the SPI bus to ensure the normal work of the voice function;
step S17, finishing initialization;
the same principle is applied to the initialization of the FXS unit and the initialization process of the FXO unit, and the different points are that a voice chip in the FXS unit and a voice chip in the FXO unit are not of the same model, and specific values matched with register configuration are different when the chips are configured.
In the method, the generation process of the custom frequency waveform signal of the FXO unit comprises the following steps:
step S41, configuring the corresponding relationship between the first register state and the telephone event signal, which respectively is:
0x04 indicates detection of a ringing signal;
0x20 indicates detection of a reverse polarity signal;
0x00 denotes recovery status;
step S42, setting a timer, continuously reading the first register state before the timer is overtime, and judging the type of the detected telephone event signal according to the first register state value; if the read first register state is 0x04, perform step S43; if the read first register state is 0x20, execute step S44; if the read first register state is 0x00, execute step S45;
step S43, correspondingly generating a first self-defined frequency waveform signal, and then executing step S48;
step S44, correspondingly generating a second self-defined frequency waveform signal, and then executing step S48;
step S45, judging whether the last event signal is ringing or reverse polarity signal, if ringing, executing step S46; otherwise, go to step S47;
step S46, if the former event is ringing, at this time, generating a third custom frequency waveform signal indicating vibration stop, and then executing step S48;
step S47, if the previous state is reverse polarity, then a fourth self-defined frequency waveform signal indicating that reverse polarity is stopped is generated, and then step S48 is executed;
and step S48, sending the generated custom frequency waveform signal to the FXS unit.
In the method, the detection process of the self-defined frequency waveform signal of the FXS unit comprises the following steps:
step S51, setting a capture data input pin and capturing a waveform signal with a custom frequency;
step S52, judging the waveform of the captured waveform signal with the self-defined frequency, if the waveform is the first waveform signal with the self-defined frequency, executing step S53; if the signal is the second waveform signal with the custom frequency, executing the step S54; if the signal is the third waveform signal with the custom frequency, executing the step S55; if the signal is the fourth self-defined frequency waveform signal, go to step S56;
step S53, operating the telephone to ring;
step S54, operating the reversal of the telephone;
step S55, operating the telephone to stop ringing;
and step S56, operating the telephone to stop the reverse polarity.
In the method, the generation process of the custom frequency waveform signal of the FXS unit comprises the following steps:
step S61, configuring the corresponding relationship between the second register state and the telephone event signal, which respectively is:
0x10 indicates that an off-hook signal is detected;
0x00 indicates the detection of an on-hook signal;
step S62, setting a timer, continuously reading the state of the second register before the timer is overtime, and judging the type of the detected telephone event signal according to the state value of the second register; if the read second register state is 0x10, perform step S63; if the read second register state is 0x00, execute step S64;
step S63, correspondingly generating a fifth custom frequency waveform signal, and then executing step S65;
step S64, correspondingly generating a sixth custom frequency waveform signal, and then executing step S65;
and step S65, sending the generated custom frequency waveform signal to the FXO unit.
In the method, the detection process of the self-defined frequency waveform signal of the FXO unit comprises the following steps:
step S71, setting a capture data input pin and capturing a waveform signal with a custom frequency;
step S72, judging the waveform of the captured waveform signal with the self-defined frequency, if the waveform is the fifth waveform signal with the self-defined frequency, executing step S73; if the signal is the sixth custom frequency waveform signal, executing step S74;
step S73, simulating and reporting an off-hook event;
and step S74, simulating the on-hook reporting event.
In the above-mentioned method, the first step of the method,
the first custom frequency waveform signal is defined as a 0001 square wave of 41 KHz;
the second self-defined frequency waveform signal is defined as a 0010 square wave of 41 KHz;
the third self-defined frequency waveform signal is defined as a 0011 square wave of 41 KHz;
the fourth self-defined frequency waveform signal is defined as 0100 square wave of 41 KHz;
the fifth self-defined frequency waveform signal is defined as 0101 square wave of 41 KHz;
the sixth custom frequency waveform signal is defined as a 0110 square wave at 41 KHz.
The voice signaling transmission circuit is separated when the CPE has the backward feed and does not have the backward feed through the relays arranged in the FXO unit and the FXS unit, the conversion of the voice direct current signaling is realized by using the method of the POTS adapter module, the problem that the analog voice signaling influenced by the backward feed in the G.FAST system cannot be normally transmitted is successfully solved, and the voice signaling transmission circuit is suitable for the deployment of the voice service from a high-speed coaxial cable to a home, does not depend on a complex signaling standard and has strong designability; different from the standard voice signaling flow control, the management of the user telephone service can be realized only by establishing a square wave frequency signal protocol which can be carried by a line between the FXO and the FXS of the user terminal, and the method has strong operability and flexible adaptability.
Drawings
Fig. 1 is a schematic view of an application scenario of a conventional g.fast system;
FIG. 2 is a flow chart of a voice service implementation in the present invention when the CPE is not back-feeding;
FIG. 3 is a flow chart of the voice service implementation when the CPE performs backfeed in the present invention;
FIG. 4 is a flow chart of the initialization of the FXO unit in the invention;
FIG. 5 is a flow chart of a custom frequency waveform signal generation process of the FXO unit in the invention;
FIG. 6 is a flow chart of a custom frequency waveform signal detection process of the FXS unit in the invention;
FIG. 7 is a flow chart of a custom frequency waveform signal generation process of the FXS unit in the invention;
FIG. 8 is a flow chart of the custom frequency waveform signal detection process of the FXO unit of the invention.
Detailed Description
The invention realizes the conversion of voice direct current signaling by using the method of using the POTS adapter module, so that analog voice service in the G.FAST system is not influenced by feedback electrical technology.
The invention provides a method for realizing analog telephone service suitable for high-speed copper wire access, which realizes normal analog voice service in a G.FAST system by using a POTS adapter module (comprising an FXO unit and an FXS unit), and specifically comprises the following steps:
relays are respectively arranged in an FXO unit and an FXS unit of the POTS adapter module, and the relays are used as selection switches to select a voice direct-current signaling transmission path according to whether the CPE performs reverse feeding or not;
when the CPE is not back-fed:
the standard voice direct current signaling is directly transmitted through a telephone line, controls the telephone to generate ringing, reverse polarity, stop ringing or stop reverse polarity according to the voice direct current signaling, and reports and detects the events of off-hook and on-hook of the telephone;
when the CPE is back-fed:
the POTS adaptation module is used for converting voice direct current signaling into a waveform signal with a user-defined frequency for transmission, controlling a telephone to generate ringing, polarity reversal, ringing stop or polarity reversal stop according to the waveform signal with the user-defined frequency, and simulating off-hook and on-hook events to be reported to a PBX (Private Branch Exchange).
The invention realizes the realization method suitable for simulating the voice service in the backward feed state by introducing the detection and generation rule of the waveform signal of the self-defined frequency and by means of the flexibility of the detection and generation of the waveform signal of the self-defined frequency, and the control voice module chip has certain rule association with the generation mode by the detection of the waveform signal of the self-defined frequency and is realized without a complex protocol standard.
The invention is described in detail below with reference to the drawings and specific embodiments of the specification, wherein the implementation environment of the specific embodiments is a network device of an embedded Linux system.
The first embodiment.
In this embodiment, when the CPE is not back-fed:
as shown in fig. 2, the relays in the FXO unit and the FXS unit are released, the direct current path is connected, the standard voice direct current signaling is directly transmitted through the telephone line, the telephone is controlled to generate ringing, reverse polarity, stop ringing or stop reverse polarity according to the voice direct current signaling, and the off-hook and on-hook events of the telephone are reported and detected;
when the CPE is back-fed:
as shown in fig. 3, the FXO unit and the relay in the FXS unit are attracted, the dc path is disconnected, the analog voice signal (standard voice dc signaling) cannot be directly transmitted to the telephone through the telephone line, the power feeding enters the POTS adapter module, the POTS adapter module converts the voice dc signaling into the waveform signal with the user-defined frequency for transmission, and controls the telephone to generate ringing, reverse polarity, stop ringing or reverse polarity according to the waveform signal with the user-defined frequency, and the analog off-hook and on-hook events are reported to the PBX;
the relay is a 12V and 36mW low-power-consumption relay, and the working current is 3 mA.
Example two.
When the feed enters the POTS adapter module, the FXO unit and the FXS unit of the POTS adapter module enter a working state, which specifically includes:
respectively initializing an FXO unit and an FXS unit;
the FXO unit detects signals such as ringing, inverse pole and the like, converts the signals such as ringing, inverse pole and the like into a self-defined frequency waveform signal capable of avoiding the influence of backward feeding, and transmits the self-defined frequency waveform signal to the FXS unit, and the FXS unit controls ringing, inverse pole, stopping ringing or stopping inverse pole of a telephone according to the self-defined frequency waveform signal;
in the other direction, the FXS unit detects off-hook and on-hook signals of the telephone, converts the off-hook and on-hook signals into waveform signals with self-defined frequency and informs the signals to the FXO unit; and the FXO unit simulates off-hook and on-hook events according to the waveform signal of the user-defined frequency and reports the off-hook and on-hook events to the PBX.
In this embodiment, the signal generating and detecting unit is a circuit module, and can generate and detect frequency signals of 0.3K to 60K through GPIO, TIMER, and COUNTER of the single chip, and the frequency can be set through software, and the general frequency can be more than 4K.
Example three.
In this embodiment, as shown in fig. 4, initializing the FXO unit specifically includes the following steps:
step S11, after the FXO unit is powered on, important pin definition of GPIO is set;
step S12, setting a delay of 100ms to ensure that the set pin attribute definition takes effect;
s13, resetting a voice chip in the FXO unit;
step S14, delaying for 500 ms;
step S15, judging whether the acquired voice chip type meets the type matching requirement, if so, executing step S16; otherwise, go to step S17;
step S16, performing conventional register configuration on the voice chip through the SPI bus to ensure the normal work of the voice function;
step S17 ends the initialization.
The initialization of the FXS unit is similar to the initialization process of the FXO unit, and the difference is that the voice chip inside the FXS unit and the voice chip of the FXO unit are not of the same model, and there is a difference in the operation of the register when performing the chip configuration, that is, in step S16, a value matched with the register needs to be configured according to the attribute requirement of the FXS unit, so that the FXS unit can normally work.
Example four.
The following describes the generation and detection process of the self-defined frequency waveform signal of the FXO unit and the FXS unit in detail through the present embodiment.
As shown in fig. 5, in this embodiment, the process of generating the custom frequency waveform signal of the FXO unit includes the following steps:
step S41, configuring the corresponding relationship between the first register state and the telephone event signal, which respectively is:
0x04 indicates detection of a ringing signal;
0x20 indicates detection of a reverse polarity signal;
0x00 represents the recovery state.
Step S42, setting a timer, continuously reading the first register state before the timer is overtime, and judging the type of the detected telephone event signal according to the first register state value; if the read first register state is 0x04, perform step S43; if the read first register state is 0x20, execute step S44; if the read first register state is 0x00, go to step S45.
Step S43, a first custom frequency waveform signal 1 (which may be defined as 0001 square wave of 41 KHz) is generated, and then step S48 is performed.
Step S44, a second custom frequency waveform signal 2 (which may be defined as a 0010 square wave of 41 KHz) is generated, and then step S48 is performed.
Step 45, judging whether the last event signal is a ringing or a reverse polarity signal, if the last event signal is the ringing, executing step 46; otherwise, step S47 is executed.
Step S46, if the previous event was ringing, then a third custom frequency waveform signal 3 indicating vibration stop is generated, and then step S48 is performed.
Step S47, if the previous state is reverse polarity, at this time, the fourth self-defined frequency waveform signal 4 indicating that the reverse polarity is stopped is generated, and then step S48 is performed.
And step S48, sending the generated custom frequency waveform signal to the FXS unit.
As shown in fig. 6, in this embodiment, the process of detecting the custom frequency waveform signal of the FXS unit includes the following steps:
and step S51, setting a capture data input pin and capturing a waveform signal with a custom frequency.
Step S52, judging the waveform of the captured waveform signal with the self-defined frequency, if the waveform is the first waveform signal with the self-defined frequency 1, executing step S53; if the signal is the second custom-frequency waveform signal 2, executing step S54; if the signal is the third custom frequency waveform signal 3, executing step S55; if it is the fourth self-defined frequency waveform signal 4, go to step S56.
Step S53, ringing the telephone.
Step S54, the telephone is operated to reverse polarity.
Step S55, the telephone is operated to stop ringing.
And step S56, operating the telephone to stop the reverse polarity.
As shown in fig. 7, in this embodiment, the process of generating the custom frequency waveform signal of the FXS unit includes the following steps:
step S61, configuring the corresponding relationship between the second register state and the telephone event signal, which respectively is:
0x10 indicates that an off-hook signal is detected;
0x00 indicates that an on-hook signal is detected.
Step S62, setting a timer, continuously reading the state of the second register before the timer is overtime, and judging the type of the detected telephone event signal according to the state value of the second register; if the read second register state is 0x10, perform step S63; if the read second register state is 0x00, execute step S64.
Step S63, correspondingly generating the fifth custom frequency waveform signal 5, and then performing step S65.
Step S64, generating the sixth custom frequency waveform signal 6, and then executing step S65.
And step S65, sending the generated custom frequency waveform signal to the FXO unit.
As shown in fig. 8, in this embodiment, the process of detecting the custom frequency waveform signal of the FXO unit includes the following steps:
and step S71, setting a capture data input pin and capturing a waveform signal with a custom frequency.
Step S72, judging the waveform of the captured waveform signal with the self-defined frequency, if the waveform is the fifth waveform signal with the self-defined frequency 5, executing step S73; if it is the sixth custom frequency waveform signal 6, go to step S74.
And step S73, simulating and reporting an off-hook event.
And step S74, simulating the on-hook reporting event.
Example five.
In this embodiment, the waveform signal of the custom frequency is a square wave, which specifically includes:
the first custom frequency waveform signal is defined as 0001 square wave of 41 KHz;
the second self-defined frequency waveform signal is defined as 0010 square wave of 41 KHz;
the third self-defined frequency waveform signal is defined as a 0011 square wave of 41 KHz;
the fourth self-defined frequency waveform signal is defined as 0100 square wave of 41 KHz;
the waveform signal of the fifth custom frequency is defined as 0101 square wave of 41 KHz;
the sixth custom frequency waveform signal is defined as a 0110 square wave at 41 KHz.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for realizing analog telephone service suitable for high-speed copper wire access is characterized by comprising the following steps:
relays are respectively arranged in an FXO unit and an FXS unit of the POTS adapter module, and the relays are used as selection switches to select a voice direct-current signaling transmission path according to whether the CPE performs reverse feeding or not;
when the CPE is not back-fed:
the standard voice direct current signaling is directly transmitted through a telephone line, controls the telephone to generate ringing, reverse polarity, stop ringing or stop reverse polarity according to the voice direct current signaling, and reports and detects the events of off-hook and on-hook of the telephone;
when the CPE is back-fed:
converting voice direct current signaling into a waveform signal with a user-defined frequency by using a POTS adaptation module for transmission, controlling a telephone to generate ringing, inverting, stopping ringing or inverting according to the waveform signal with the user-defined frequency, and reporting an off-hook event and an on-hook event to the PBX;
the process of generating the waveform signal with the custom frequency by the FXO unit of the POTS adaptation module comprises the following steps:
step S41, configuring the corresponding relationship between the first register state and the telephone event signal, which respectively is:
0x04 indicates detection of a ringing signal;
0x20 indicates detection of a reverse polarity signal;
0x00 denotes recovery status;
step S42, setting a timer, continuously reading the first register state before the timer is overtime, and judging the type of the detected telephone event signal according to the first register state value; if the read first register state is 0x04, perform step S43; if the read first register state is 0x20, execute step S44; if the read first register state is 0x00, execute step S45;
step S43, correspondingly generating a first self-defined frequency waveform signal, and then executing step S48;
step S44, correspondingly generating a second self-defined frequency waveform signal, and then executing step S48;
step S45, judging whether the last event signal is ringing or reverse polarity signal, if ringing, executing step S46; otherwise, go to step S47;
step S46, if the former event is ringing, at this time, generating a third custom frequency waveform signal indicating vibration stop, and then executing step S48;
step S47, if the previous state is reverse polarity, then a fourth self-defined frequency waveform signal indicating that reverse polarity is stopped is generated, and then step S48 is executed;
and step S48, sending the generated custom frequency waveform signal to the FXS unit.
2. The method of claim 1, wherein when the CPE is not back-fed:
the relays in the FXO unit and the FXS unit are released, the direct current path is communicated, standard voice direct current signaling is directly transmitted through a telephone line, the telephone is controlled to generate ringing, reverse polarity, stop ringing or reverse polarity according to the voice direct current signaling, and the telephone is reported to detect the events of off-hook and on-hook of the telephone;
when the CPE is back-fed:
the relay in FXO unit and FXS unit is closed, the direct current path is cut off, the power feed enters POTS adapter module, the POTS adapter module converts the voice direct current signaling into waveform signal with self-defined frequency for transmission, and controls the telephone to generate ringing, reverse polarity, stop ringing or reverse polarity according to the waveform signal with self-defined frequency, and simulate the events of off-hook and on-hook to report to PBX.
3. The method of claim 2, wherein when the feed enters the POTS adapter module, the FXO unit and the FXS unit of the POTS adapter module enter an operational state, comprising:
respectively initializing an FXO unit and an FXS unit;
the FXO unit detects ringing and reverse-pole signals, converts the ringing and reverse-pole signals into waveform signals with custom frequency and transmits the waveform signals to the FXS unit; the FXS unit controls ringing, inverting, stopping ringing or inverting of the telephone according to the waveform signal of the custom frequency;
in the other direction, the FXS unit detects off-hook and on-hook signals of the telephone, converts the off-hook and on-hook signals into waveform signals with self-defined frequency and informs the signals to the FXO unit; and the FXO unit simulates off-hook and on-hook events according to the waveform signal of the user-defined frequency and reports the off-hook and on-hook events to the PBX.
4. The method of claim 1, wherein the relay is a 12V, 36mW low power relay with an operating current of 3 mA.
5. The method of claim 3, wherein the initialization of the FXO unit comprises in particular the steps of:
step S11, after the FXO unit is powered on, important pin definition of GPIO is set;
step S12, setting a delay of 100ms to ensure that the set pin attribute definition takes effect;
s13, resetting a voice chip in the FXO unit;
step S14, delaying for 500 ms;
step S15, judging whether the acquired voice chip type meets the type matching requirement, if so, executing step S16; otherwise, go to step S17;
step S16, performing conventional register configuration on the voice chip through the SPI bus to ensure the normal work of the voice function;
step S17, finishing initialization;
the same principle is applied to the initialization of the FXS unit and the initialization process of the FXO unit, and the different points are that a voice chip in the FXS unit and a voice chip in the FXO unit are not of the same model, and specific values matched with register configuration are different when the chips are configured.
6. The method of claim 3, wherein the custom frequency waveform signal detection process of the FXS unit comprises the steps of:
step S51, setting a capture data input pin and capturing a waveform signal with a custom frequency;
step S52, judging the waveform of the captured waveform signal with the self-defined frequency, if the waveform is the first waveform signal with the self-defined frequency, executing step S53; if the signal is the second waveform signal with the custom frequency, executing the step S54; if the signal is the third waveform signal with the custom frequency, executing the step S55; if the signal is the fourth self-defined frequency waveform signal, go to step S56;
step S53, operating the telephone to ring;
step S54, operating the reversal of the telephone;
step S55, operating the telephone to stop ringing;
and step S56, operating the telephone to stop the reverse polarity.
7. The method of claim 3, wherein the custom frequency waveform signal generation process of the FXS unit comprises the steps of:
step S61, configuring the corresponding relationship between the second register state and the telephone event signal, which respectively is:
0x10 indicates that an off-hook signal is detected;
0x00 indicates the detection of an on-hook signal;
step S62, setting a timer, continuously reading the state of the second register before the timer is overtime, and judging the type of the detected telephone event signal according to the state value of the second register; if the read second register state is 0x10, perform step S63; if the read second register state is 0x00, execute step S64;
step S63, correspondingly generating a fifth custom frequency waveform signal, and then executing step S65;
step S64, correspondingly generating a sixth custom frequency waveform signal, and then executing step S65;
and step S65, sending the generated custom frequency waveform signal to the FXO unit.
8. The method of claim 7, wherein the custom frequency waveform signal detection process of the FXO cell comprises the steps of:
step S71, setting a capture data input pin and capturing a waveform signal with a custom frequency;
step S72, judging the waveform of the captured waveform signal with the self-defined frequency, if the waveform is the fifth waveform signal with the self-defined frequency, executing step S73; if the signal is the sixth custom frequency waveform signal, executing step S74;
step S73, simulating and reporting an off-hook event;
and step S74, simulating the on-hook reporting event.
9. The method of any one of claims 1 to 6,
the first custom frequency waveform signal is defined as a 0001 square wave of 41 KHz;
the second self-defined frequency waveform signal is defined as a 0010 square wave of 41 KHz;
the third self-defined frequency waveform signal is defined as a 0011 square wave of 41 KHz;
the fourth self-defined frequency waveform signal is defined as a 0100 square wave at 41 KHz.
10. The method according to any one of claims 7 to 8,
the fifth self-defined frequency waveform signal is defined as 0101 square wave of 41 KHz;
the sixth custom frequency waveform signal is defined as a 0110 square wave at 41 KHz.
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| CN107646184A (en) * | 2015-05-26 | 2018-01-30 | 阿尔卡特朗讯 | New broadband communication services are provided using reverse feeding |
| CN106027822A (en) * | 2016-05-12 | 2016-10-12 | 烽火通信科技股份有限公司 | System and method for allowing data, reverse power feed and voice to coexist in pair of telephone wires |
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