CN107659857A - A kind of method and apparatus that remote phone user access PBX is realized based on FPGA - Google Patents

A kind of method and apparatus that remote phone user access PBX is realized based on FPGA Download PDF

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Publication number
CN107659857A
CN107659857A CN201711030269.4A CN201711030269A CN107659857A CN 107659857 A CN107659857 A CN 107659857A CN 201711030269 A CN201711030269 A CN 201711030269A CN 107659857 A CN107659857 A CN 107659857A
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ptn
pbx
analog
packet
pcm stream
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CN201711030269.4A
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CN107659857B (en
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何传华
蔡亦智
肖利文
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Shen Ou Communication Equipment Co Ltd
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Shen Ou Communication Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/04—Circuit arrangements for receivers of routing digits
    • H04Q3/10—Circuit arrangements for receivers of routing digits for PBX selectors, i.e. private branch exchange selectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission
    • H04B10/25891—Transmission components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Optical Communication System (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

The present invention relates to communication technical field, more particularly to a kind of method and apparatus that remote phone user access PBX is realized based on FPGA, by applying the technical scheme of the present invention, far-end analog telephone terminal, telephone line can be first passed through to gateway device, the gateway device is directly connected to PBX main frames by Ethernet or optical fiber or first accesses PTN network, coupled again by PTN network with PBX main frames, PTN labeled packet switching technologies are used in communication, so as to reach, far-end analog telephone terminal is accessed into PBX system, the purpose as PBX completely restricted extensions.When remote phone user is accessed into PBX, with the market, being compared at present using the method for the multiplexing equipments such as voice channel multiplex device, by using the process and apparatus of the present invention, total system lower deployment cost can be significantly reduced.

Description

A kind of method and apparatus that remote phone user access PBX is realized based on FPGA
Technical field
It is more particularly to a kind of to realize that remote phone user accesses PBX's based on FPGA the present invention relates to communication technical field Method and apparatus.
Background technology
In the actual networking of voice communication apparatus, the demand of formula networking is often distributed, i.e. will be distant（1Km with On air line distance）Multiple points（Branch company, office）Telephone terminal, be linked into same PBX；Due to analog phone The distance that is directly accessed of line is limited（No more than 1Km）, therefore need to use other equipment to access remote phone extension set PBX, the equipment cost that scheme on the market uses at present are higher.
As shown in figure 1, being scheme schematic diagram at present on the market, it is as follows that it implements process：
In voice exchange PBX sides, the extension set that extend to distal end is FXS_1 to FXS_8,8 extension sets, first by this 8 extension sets It is directly connected to near-end multiplexing equipment；Near-end multiplexing equipment is connected by optical fiber with distal end multiplexing equipment again；Distal end multiplexing equipment Reduction FXS_1 docks to FXS_8, then with distal end phone, is so achieved that distal end phone access PBX purpose.
PBX sides, FXS represent user's board, are used for machine of answering under normal circumstances, and phone is more, and it is more to take user's plate；Figure In, it would be desirable to the extension set port for extending to distal end is connected on the multiplexing equipment of near-end；
Near-end multiplexing equipment need to configure FXO boards, could be docked with PBX extension set port, extension set port is more, FXO boards Accordingly to increase；The effect of near-end multiplexing equipment, really modulus/digital-to-analogue conversion；That is, the mould received from PBX FXS ports Intend signal, be converted to data signal, distal end multiplexing equipment is issued by optical fiber；Meanwhile by optical fiber from distal end multiplexing equipment The data signal received, is reduced to analog signal, is sent to PBX FXS ports；
Between near-end multiplexing equipment and distal end multiplexing equipment, connected by special optic fibre, that is, monopolize this optical fiber；
By foregoing description, learn, in Fig. 1 scheme, using to hardware configuration have：（1）PBX user's board；（2）Near-end Multiplexing equipment；（3）The multiplexing equipment of distal end, equipment are more；When distal end phone is more, PBX end subscriber boards are more, near-end Multiplexing equipment board is more, and scheme entirety hardware cost dramatically increases；In addition, between near-end multiplexing equipment and distal end multiplexing equipment Handy special optic fibre docking, occupies relatively nervous fiber resource；In engineering construction, PBX end subscribers need to be directly connected to Near-end multiplexing equipment, way is more, and construction complexity is higher, and scheme holistic cost is higher.
The content of the invention
The present invention in view of the above-mentioned problems, provide it is a kind of based on FPGA realize remote phone user access PBX method and set It is standby.
The technical solution used in the present invention is as follows：One kind is based on FPGA（Field programmable gate array）Realize remote phone User accesses PBX（User class interchanger）Method, including at least following steps：
First, the process that the analog station that user uses sends signal is as follows：
The analog telephone signal of distal end is first subjected to analog-to-digital conversion, analog telephone signal is changed into data signal, and further turn For PCM（Pulse code modulation）Code stream form；
The pcm stream is sent to FPGA, after FPGA receives the pcm stream, does respective handling, and be packaged as being adapted in PTN（Point Group transmission net）The PTN packets transmitted in network, the PTN packets are then sent to PBX；
On PBX, the digital bags of the PTN are received using FPGA, and the PTN packets are reduced to pcm stream, access PBX exchange In network, so, the signal of the analog station of remote phone user is sent completely；
2nd, the process for the analog station reception signal that user uses is as follows：
The pcm stream for distributing to remote phone user is packaged as PTN network packet by PBX using FPGA, and is sent out；
Distally, the PTN network packet is received using FPGA, and does corresponding parsing, be then reduced to pcm stream；
The pcm stream is done into digital-to-analogue conversion again, then gives analog signal to user's analog station used, so, distal end electricity The analog station reception signal for talking about user is completed.
The analog station that user uses sends the process of signal, after FPGA receives the pcm stream, does respective handling, specifically Including：
After FPGA receives pcm stream, first the data of each time slot in code stream are parsed, separated by timeslot number, be stored to caching In RAM, and it is stored in by timeslot number in different queues, each queue corresponds to different address rams；
Then, data parsing, being stored in different queue are packaged as PTN network packet respectively, pass through ether Net or optical fiber are sent to PBX.
During the analog station that user uses sends signal, PBX receives the digital bags of the PTN using FPGA, and should PTN packets are reduced to pcm stream, specifically include：
After FPGA receives PTN packets, each packet is parsed, the QoS information in each packet is done to each packet Corresponding QoS processing, and the information corresponding with former pcm stream time slot in each packet, the language that will be parsed Sound data are cached in RAM by queue number, and queue number is corresponding with timeslot number, and each queue corresponds to different address rams；
Then, the data in each queue in RAM are converted to pcm stream by FPGA, are accessed in PBX exchange network, so, far The signal of the analog station of telephone subscriber is held to be sent completely.
During user uses analog station reception signal, PBX will distribute to the PCM of remote phone user using FPGA Code stream is packaged as PTN network packet, and is sent out by Ethernet or optical fiber, specifically includes：
FPGA parses each gap information in the pcm stream for distributing to remote phone user, and is divided into different queue by timeslot number, deposits Into caching RAM, each queue corresponds to different address rams；
Then, data parsing, being stored in different queue are packaged as PTN network packet respectively, the PTN network In packet, including gap information, speech data, QoS information, distal end is then sent to by Ethernet or optical fiber.
During user uses analog station reception signal, distal end, PTN network packet is received using FPGA, and do Corresponding parsing, is then reduced to pcm stream, specifically includes：
After FPGA receives PTN packets, each packet is parsed, the QoS information in each packet is done to each packet Corresponding QoS processing, and the information corresponding with former pcm stream time slot in each packet, the language that will be parsed Sound data are cached in RAM by queue number, and queue number is corresponding with timeslot number, and each queue corresponds to different address rams；
Then, the data in each queue in RAM are converted to pcm stream by FPGA, then the pcm stream is sent into digital-to-analogue conversion Module is changed, and the analog signal converted is just sent to the analog station that user uses.
A kind of equipment that remote phone user access PBX is realized based on FPGA, is comprised at least：
（1）Remote equipment, including such as lower part：
Modulus/D/A converter module, the analog telephone signal of distal end is subjected to analog-to-digital conversion, analog telephone signal is changed into numeral Signal, and further switch to pcm stream form；Or pcm stream signals revivification is sent to remote phone for analog signal and used The analog station at family；
Pcm stream/PTN processing data packets modules, during analog station sends signal, for pcm stream to be packaged as It is adapted to the packet transmitted in PTN network；During analog station reception signal, for parsing the PTN network number received According to bag, by PTN network packet, pcm stream is reduced to；
PTN packet transceiver modules, for receiving/sending PTN packets；
（2）PBX end equipments, including such as lower part：
Pcm stream/PTN processing data packets modules, during analog station sends signal, for parsing the PTN nets received Network packet, by PTN network packet, pcm stream is reduced to, and accessed in PBX exchange network；Receive and believe in analog station During number, for pcm stream to be packaged as to be adapted to the packet transmitted in PTN network；
PTN packet transceiver modules, for receiving/sending PTN packets.
Modulus/D/A converter module of the remote equipment, is specifically used for：
On the direction that far-end analog phone sends signal, the analog telephone signal of distal end is subjected to analog-to-digital conversion, makes simulation electric Words signal is changed into data signal, and further switchs to pcm stream form；And/or
It is that analog signal is sent to remote phone by pcm stream signals revivification on the direction of far-end analog phone reception signal The analog station of user.
The pcm stream of the remote equipment/PTN processing data packets modules, is specifically used for：
During far-end analog phone sends signal, after receiving pcm stream, the data of each time slot in code stream are parsed Come, separated by timeslot number, is stored in caching RAM, and be stored in by timeslot number in different queues, each queue corresponds to different Address ram；Then, data parsing, being stored in different queue are packaged as PTN network packet respectively；
During far-end analog phone reception signal, after receiving PTN packets, each packet is parsed, according to each number Corresponding QoS processing is done to each packet according to the QoS information in bag；And in each packet with former pcm stream time slot Corresponding information, the voice messaging parsed is cached in RAM by queue number, queue number is corresponding with timeslot number, often Individual queue corresponds to different address rams；Then, the data in each queue in RAM are converted into pcm stream.
The PTN packet transceiver modules of the remote equipment, are specifically used for：
During far-end analog phone sends signal, by Ethernet or optical fiber, PTN network packet is sent to PBX end equipments；
During far-end analog phone reception signal, by Ethernet or optical fiber, PTN network packet is received；
The PTN packet transceiver modules of the PBX end equipments, are specifically used for：
During far-end analog phone sends signal, by Ethernet or optical fiber, PTN network packet is received；
During far-end analog phone reception signal, by Ethernet or optical fiber, PTN network packet is sent to Remote equipment.
The pcm stream of the PBX end equipments/PTN processing data packets modules, is specifically used for：
During far-end analog phone sends signal, each PTN packets that remote equipment sends over are parsed, according to each QoS information in packet does corresponding QoS processing to each packet；And in each packet with former pcm stream when The corresponding information of gap, the voice messaging parsed is cached in RAM by queue number, and queue number is corresponding with timeslot number, Each queue corresponds to different address rams；Then, the data in each queue in RAM are converted into pcm stream, and access PBX Exchange network in；
During far-end analog phone reception signal, parsing PBX distributes to each time slot in the pcm stream of remote phone user Information, and it is divided into different queue by timeslot number, it is stored in caching RAM, each queue corresponds to different address rams；Then, solution Data separating out, being stored in different queue are packaged as PTN network packet respectively, in the PTN network packet, including Gap information, voice digital signal, QoS information.
Beneficial effects of the present invention are as follows：By applying the technical scheme of the present invention, in PBX sides, one piece need to be only configured specially With board, the multiplexing equipment of near-end in prior art is saved, reduces overall hardware cost；With to extend to distal end Extension set quantity increase, the solution of the present invention, in PBX sides, hardware cost is constant, and it is steep to overcome hardware cost in existing scheme The shortcomings that increasing；Special-purpose plate card on PBX, using optical fiber or Ethernet interface, by PTN network or direct-connected mode, with distal end net Close communication；Do not monopolize nervous fiber resource., will be remote realizing using the method in the present invention compared with prior art In the overall plan for holding telephony access PBX, hardware cost and construction complexity can be significantly reduced.
Brief description of the drawings
Fig. 1 is scheme schematic diagram at present on the market.
Fig. 2 is the scheme schematic diagram of the embodiment of the present invention.
Fig. 3 is the flow chart of method provided in an embodiment of the present invention.
Fig. 4 is the module frame chart of middle remote gateways equipment shown in Fig. 3.
Fig. 5 is the module frame chart of middle PBX sides Special-purpose plate card shown in Fig. 3.
Embodiment
As stated in the Background Art, the hardware device that prior art uses is more, and when distal end phone is more, PBX ends User's board increases, and near-end multiplexing equipment board increases, and scheme entirety hardware cost dramatically increases；In addition, near-end multiplexing equipment Handy special optic fibre docking, occupies relatively nervous fiber resource between the multiplexing equipment of distal end；In engineering construction, PBX End subscriber needs to be directly connected to near-end multiplexing equipment, and way is more, and construction complexity is higher, and scheme holistic cost is higher.
In order to overcome above-mentioned deficiency, realize that remote phone user accesses based on FPGA the embodiments of the invention provide a kind of PBX method and apparatus, by the technical scheme of the application embodiment of the present invention, in PBX sides, one piece of Special-purpose plate card only need to be configured, The multiplexing equipment of near-end in prior art is saved, reduces overall hardware cost；With the extension set of distal end to be extended to The increase of quantity, the scheme of the embodiment of the present invention, in PBX sides, hardware cost is constant, and it is steep to overcome hardware cost in existing scheme The shortcomings that increasing；Special-purpose plate card on PBX, using optical fiber or Ethernet interface, by PTN network or direct-connected mode, with distal end net Communication is closed, does not monopolize nervous fiber resource.By the technical scheme of the application embodiment of the present invention, in PBX sides, one only need to be configured Block Special-purpose plate card, the multiplexing equipment of near-end in prior art is saved, reduce overall hardware cost；With extending to The increase of the extension set quantity of distal end, the scheme of the embodiment of the present invention, in PBX sides, hardware cost is constant, overcomes in existing scheme The shortcomings that hardware cost increases suddenly；Special-purpose plate card on PBX, using optical fiber or Ethernet interface, pass through PTN network or direct-connected side Formula, communicated with remote gateways, do not monopolize nervous fiber resource.
Fig. 3 is the flow chart of method provided in an embodiment of the present invention, is specifically included：
Distal end phone will access PBX, turn into PBX completely restricted extension, it is necessary to and PBX is communicated, by signal transmission in flow Direction make a distinction, signal and this 2 directions of reception signal can be sent from distal end phone respectively, flow chart is analyzed.
On the direction that distal end phone sends signal, specifically include：
The analog telephone signal of distal end is first subjected to analog-to-digital conversion, analog telephone signal is changed into data signal, and further turn For pcm stream format signal；Analog end slogan shared by analog station, corresponding to the time slot in pcm stream；(last PBX is received It is that corresponding extension number is gone according to pcm stream timeslot number to after signal；)
The pcm stream is sent to FPGA again, after FPGA receives the pcm stream, respective handling is done, specifically includes：
First the data of each time slot in code stream are parsed, separated by timeslot number, are stored in caching RAM, and deposited by timeslot number It is placed in different queues, each queue corresponds to different address rams；
Then, FPGA is again data parsing, being stored in different queue, the data recombination before being packed, mainly It is increase, improves the data that packing needs, the data in queue is then packaged as PTN network packet respectively again.
Then Ethernet or optical fiber interface are used, by above-mentioned PTN packets, by PTN network, is sent to PBX；
After FPGA on PBX Special-purpose plate cards receives PTN packets, each packet is parsed, the QoS letters in each packet Breath does corresponding QoS processing, and the information corresponding with former pcm stream time slot in each packet to each packet, The voice digital signal parsed is cached in RAM by queue number, queue number is corresponding with timeslot number, and each queue is corresponding Different address rams；
Then, the data in each queue in RAM are converted to pcm stream by FPGA, are accessed in PBX exchange network.
So, the signal of the analog station of remote phone user is sent completely.
In the flow of distal end phone reception signal（PBX ends are sent on the direction of signal）, specifically include：
FPGA on PBX Special-purpose plate cards parses each gap information in the pcm stream for distributing to remote phone user, and presses timeslot number It is divided into different queue, is stored in caching RAM, each queue corresponds to different address rams；
Then, data parsing, being stored in different queue are packaged as PTN network packet respectively, the PTN network In packet, including gap information, speech data, QoS information etc., then using Ethernet or optical fiber, pass through PTN nets Network, it is sent to distal end；
After FPGA in remote gateways receives PTN packets, each packet is parsed, according to the QoS information in each packet Corresponding QoS processing, and the information corresponding with former pcm stream time slot in each packet are done to each packet, will The speech data parsed is cached in RAM by queue number, and queue number is corresponding with timeslot number, and each queue corresponds to different Address ram；Then the data in each queue are converted into pcm stream again；
The pcm stream is sent into D/A converter module again to be changed, the analog signal converted, is sent to user's use Analog station.So, the signal of the analog station of remote phone user finishes receiving.Above from the simulation of remote phone user Phone sending and receiving signal, this 2 directions, is described to flow shown in Fig. 3.
Fig. 4 is in Fig. 3 flows, the module frame chart of remote equipment, is specifically included：
（1）Modulus/D/A converter module：The analog telephone signal of distal end is subjected to analog-to-digital conversion, is changed into analog telephone signal Data signal, and further switch to pcm stream form；Or pcm stream signals revivification is sent to distal end electricity for analog signal Talk about the analog station of user；
（2）Pcm stream/PTN processing data packets modules：During analog station sends signal, for will be each in code stream The data of time slot parse, and are separated by timeslot number, are stored in caching RAM, and are stored in by timeslot number in different queues, often Individual queue corresponds to different address rams, then data parsing, being stored in different queue, the number before being packed According to restructuring, mainly increase, improve the data that packing needs, the data in queue are then packaged as PTN network number respectively again According to bag；During analog station reception signal, for after PTN packets are received, parsing each packet, according to each number Do corresponding QoS processing to each packet according to the QoS information in bag, and in each packet with former pcm stream time slot Corresponding information, the speech data parsed is cached in RAM by queue number, queue number is corresponding with timeslot number, often Individual queue corresponds to different address rams；Then the data in each queue are converted into pcm stream again；
（3）PTN packet transceiver modules：For receiving/sending PTN packets by netting twine or optical fiber；
Fig. 5 is in Fig. 3 flows, the module frame chart of PBX sides Special-purpose plate card, is specifically included：
（1）PTN packet transceiver modules：For receiving/sending PTN packets by netting twine or optical fiber；
（2）Pcm stream/PTN processing data packets modules：During analog station sends signal, for receiving PTN data Bao Hou, each packet being parsed, the QoS information in each packet does corresponding QoS processing to each packet, and according to The information corresponding with former pcm stream time slot in each packet, the speech data parsed is cached to by queue number In RAM, queue number is corresponding with timeslot number, and each queue corresponds to different address rams；Then again by the data in each queue Pcm stream is converted to, and is accessed in PBX exchange network；During analog station reception signal, for PBX to be distributed The data of each time slot parse in code stream to far-end analog phone, are separated by timeslot number, are stored in caching RAM, and press Timeslot number is stored in different queues, and each queue corresponds to different address rams, then it is parsing, be stored in difference Data in queue, the data recombination before being packed, mainly increase, improve the data that packing needs, then again by queue In data be packaged as PTN network packet respectively, and give PTN packet transceiver modules；
Compared with prior art, the technical scheme that the embodiment of the present invention is proposed has advantages below：
By the technical scheme of the application embodiment of the present invention, in PBX sides, one piece of Special-purpose plate card only need to be configured, saves existing skill The multiplexing equipment of near-end in art scheme, reduces overall hardware cost；With the increase of the extension set quantity of distal end to be extended to, sheet The scheme of inventive embodiments, in PBX sides, hardware cost is constant, overcomes the shortcomings that hardware cost increases suddenly in existing scheme；PBX On Special-purpose plate card, using optical fiber or Ethernet interface, by PTN network or direct-connected mode, communicate, do not monopolize with remote gateways Nervous fiber resource.
By the description of embodiment of above, those skilled in the art can be clearly understood that the present invention can pass through Hardware is realized, the mode of necessary general hardware platform can also be added by software to realize.Based on such understanding, the present invention Technical scheme can be embodied in the form of software product, the software product can be stored in non-volatile memory medium In, including some instructions are causing computer equipment to perform the method described in each implement scene of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram for being preferable to carry out scene, the module in accompanying drawing and Necessary to flow, not necessarily the implementation present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into Row is distributed in the device of implement scene, can also carry out one or more dresses that respective change is disposed other than this implement scene In putting.The module of above-mentioned implement scene, multiple submodule can also be further split into.
Disclosed above is only several specific implementation scenes of the present invention, and still, the present invention is not limited to this, Ren Heben What the technical staff in field can think change should all fall into protection scope of the present invention.

Claims (10)

  1. A kind of 1. method that remote phone user access PBX is realized based on FPGA, it is characterised in that including at least following steps：
    First, the process that the analog station that user uses sends signal is as follows：
    The analog telephone signal of distal end is first subjected to analog-to-digital conversion, analog telephone signal is changed into data signal, and further turn For pcm stream form；
    The pcm stream is sent to FPGA, after FPGA receives the pcm stream, does respective handling, and is packaged as being adapted in PTN nets The PTN packets transmitted in network, the PTN packets are then sent to PBX；
    On PBX, the digital bags of the PTN are received using FPGA, and the PTN packets are reduced to pcm stream, access PBX exchange In network, so, the signal of the analog station of remote phone user is sent completely；
    2nd, the process for the analog station reception signal that user uses is as follows：
    The pcm stream for distributing to remote phone user is packaged as PTN network packet by PBX using FPGA, and is sent out；
    Distally, the PTN network packet is received using FPGA, and does corresponding parsing, be then reduced to pcm stream；
    The pcm stream is done into digital-to-analogue conversion again, then gives analog signal to user's analog station used, so, distal end electricity The analog station reception signal for talking about user is completed.
  2. 2. the method according to claim 1 that remote phone user access PBX is realized based on FPGA, it is characterised in that use The analog station that family uses sends the process of signal, after FPGA receives the pcm stream, does respective handling, specifically includes：
    After FPGA receives pcm stream, first the data of each time slot in code stream are parsed, separated by timeslot number, be stored to caching In RAM, and it is stored in by timeslot number in different queues, each queue corresponds to different address rams；
    Then, data parsing, being stored in different queue are packaged as PTN network packet respectively, pass through ether Net or optical fiber are sent to PBX.
  3. 3. the method according to claim 1 that remote phone user access PBX is realized based on FPGA, it is characterised in that use During the analog station that family uses sends signal, PBX receives the digital bags of the PTN using FPGA, and by the PTN packets also Originally it was pcm stream, specifically included：
    After FPGA receives PTN packets, each packet is parsed, the QoS information in each packet is done to each packet Corresponding QoS processing, and the information corresponding with former pcm stream time slot in each packet, the language that will be parsed Sound data are cached in RAM by queue number, and queue number is corresponding with timeslot number, and each queue corresponds to different address rams；
    Then, the data in each queue in RAM are converted to pcm stream by FPGA, are accessed in PBX exchange network, so, far The signal of the analog station of telephone subscriber is held to be sent completely.
  4. 4. the method according to claim 1 that remote phone user access PBX is realized based on FPGA, it is characterised in that use During family uses analog station reception signal, the pcm stream for distributing to remote phone user is packaged as by PBX using FPGA PTN network packet, and sent out by Ethernet or optical fiber, specifically include：
    FPGA parses each gap information in the pcm stream for distributing to remote phone user, and is divided into different queue by timeslot number, deposits Into caching RAM, each queue corresponds to different address rams；
    Then, data parsing, being stored in different queue are packaged as PTN network packet respectively, the PTN network In packet, including gap information, speech data, QoS information, distal end is then sent to by Ethernet or optical fiber.
  5. 5. the method according to claim 1 that remote phone user access PBX is realized based on FPGA, it is characterised in that use During family uses analog station reception signal, distal end, PTN network packet is received using FPGA, and do corresponding parsing, so After be reduced to pcm stream, specifically include：
    After FPGA receives PTN packets, each packet is parsed, the QoS information in each packet is done to each packet Corresponding QoS processing, and the information corresponding with former pcm stream time slot in each packet, the language that will be parsed Sound data are cached in RAM by queue number, and queue number is corresponding with timeslot number, and each queue corresponds to different address rams；
    Then, the data in each queue in RAM are converted to pcm stream by FPGA, then the pcm stream is sent into digital-to-analogue conversion Module is changed, and the analog signal converted is just sent to the analog station that user uses.
  6. 6. a kind of equipment that remote phone user access PBX is realized based on FPGA, it is characterised in that comprise at least：
    Remote equipment, including such as lower part：
    Modulus/D/A converter module, the analog telephone signal of distal end is subjected to analog-to-digital conversion, analog telephone signal is changed into numeral Signal, and further switch to pcm stream form；Or pcm stream signals revivification is sent to remote phone for analog signal and used The analog station at family；
    Pcm stream/PTN processing data packets modules, during analog station sends signal, for pcm stream to be packaged as It is adapted to the packet transmitted in PTN network；During analog station reception signal, for parsing the PTN network number received According to bag, by PTN network packet, pcm stream is reduced to；
    PTN packet transceiver modules, for receiving/sending PTN packets；
    PBX end equipments, including such as lower part：
    Pcm stream/PTN processing data packets modules, during analog station sends signal, for parsing the PTN nets received Network packet, by PTN network packet, pcm stream is reduced to, and accessed in PBX exchange network；Receive and believe in analog station During number, for pcm stream to be packaged as to be adapted to the packet transmitted in PTN network；
    PTN packet transceiver modules, for receiving/sending PTN packets.
  7. 7. the equipment according to claim 6 that remote phone user access PBX is realized based on FPGA, it is characterised in that institute Modulus/D/A converter module of remote equipment is stated, is specifically used for：
    On the direction that far-end analog phone sends signal, the analog telephone signal of distal end is subjected to analog-to-digital conversion, makes simulation electric Words signal is changed into data signal, and further switchs to pcm stream form；And/or
    It is that analog signal is sent to remote phone by pcm stream signals revivification on the direction of far-end analog phone reception signal The analog station of user.
  8. 8. the equipment according to claim 6 that remote phone user access PBX is realized based on FPGA, it is characterised in that institute Pcm stream/PTN processing data packets modules of remote equipment are stated, are specifically used for：
    During far-end analog phone sends signal, after receiving pcm stream, the data of each time slot in code stream are parsed Come, separated by timeslot number, is stored in caching RAM, and be stored in by timeslot number in different queues, each queue corresponds to different Address ram；Then, data parsing, being stored in different queue are packaged as PTN network packet respectively；
    During far-end analog phone reception signal, after receiving PTN packets, each packet is parsed, according to each number Corresponding QoS processing is done to each packet according to the QoS information in bag；And in each packet with former pcm stream time slot Corresponding information, the voice messaging parsed is cached in RAM by queue number, queue number is corresponding with timeslot number, often Individual queue corresponds to different address rams；Then, the data in each queue in RAM are converted into pcm stream.
  9. 9. the equipment according to claim 6 that remote phone user access PBX is realized based on FPGA, it is characterised in that institute The PTN packet transceiver modules of remote equipment are stated, are specifically used for：
    During far-end analog phone sends signal, by Ethernet or optical fiber, PTN network packet is sent to PBX end equipments；
    During far-end analog phone reception signal, by Ethernet or optical fiber, PTN network packet is received；
    The PTN packet transceiver modules of the PBX end equipments, are specifically used for：
    During far-end analog phone sends signal, by Ethernet or optical fiber, PTN network packet is received；
    During far-end analog phone reception signal, by Ethernet or optical fiber, PTN network packet is sent to Remote equipment.
  10. 10. the equipment according to claim 6 that remote phone user access PBX is realized based on FPGA, it is characterised in that institute Pcm stream/PTN processing data packets modules of PBX end equipments are stated, are specifically used for：
    During far-end analog phone sends signal, each PTN packets that remote equipment sends over are parsed, according to each QoS information in packet does corresponding QoS processing to each packet；And in each packet with former pcm stream when The corresponding information of gap, the voice messaging parsed is cached in RAM by queue number, and queue number is corresponding with timeslot number, Each queue corresponds to different address rams；Then, the data in each queue in RAM are converted into pcm stream, and access PBX Exchange network in；
    During far-end analog phone reception signal, parsing PBX distributes to each time slot in the pcm stream of remote phone user Information, and it is divided into different queue by timeslot number, it is stored in caching RAM, each queue corresponds to different address rams；Then, solution Data separating out, being stored in different queue are packaged as PTN network packet respectively, in the PTN network packet, including Gap information, voice digital signal, QoS information.
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