CN114173012A - Audio access device for optical fiber organization - Google Patents
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 44
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- 239000000835 fiber Substances 0.000 claims description 14
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
- H04M7/0078—Security; Fraud detection; Fraud prevention
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
- H04M7/0081—Network operation, administration, maintenance, or provisioning
- H04M7/0084—Network monitoring; Error detection; Error recovery; Network testing
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Abstract
The invention belongs to the technical field of optical fiber communication, in particular to an optical fiber organization audio access device, which aims at the problems of high investment cost of PCM equipment network construction and high safety risk of VOIP telephone network. Compared with the mainstream PCM equipment and VOIP telephone number allocation mode, the invention has simple structure and reduces the investment of the optical transmission equipment or the switch connected to the voice access equipment by adopting the optical fiber direct connection mode.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to an audio access device for optical fiber organization.
Background
At present, the fixed-line telephone network networking mode of the power system mainly uses program-controlled exchange, transmission 2M link and PCM equipment to graft a voice analog signal to a digital bit stream of 64kbps, and the voice analog signal is transmitted to an opposite terminal through the 2M link and then restored. However, with the development of digital networks, operators are actively building fixed telephone networks with soft switches as the core to replace program-controlled switched networks, and gradually enter the VOIP telephony era. The main problems of the prior VOIP technical solution applied to the administrative telephone network of the power system are that the network security risk prevention and control and the unit price of an IP telephone terminal are higher. If the VOIP telephone is extended to open places such as a power supply station, a business hall and the like according to the past deployment mode, the method is equivalent to exposing the three-area comprehensive data network port of the power system to a network attacker. Therefore, when a private voice and video network is newly built for the soft switch VOIP telephone, research on an access mode and access equipment of a terminal needs to be enhanced to reduce network security risk and operation and maintenance cost. The research mode of the subject is to develop an optical fiber audio access device which combines the advantages of Pulse Code Modulation (PCM), broadband telephony (VOIP) and optical fiber communication and is suitable for the networking requirement of the current power administrative switching system.
Through retrieval, the prior art has the following defects:
1. the local program controlled exchanger is connected to PCM equipment through audio twisted pair, the PCM equipment converts continuous analog signals into discrete digital signals, the discrete digital signals are connected to transmission equipment through 2M coaxial cables and are interconnected with far-end PCM equipment, and the discrete digital signals are connected to all telephone sets through twin-core telephone lines respectively. The equipment is large in size, the upper-connection 2M coaxial cable of the PCM equipment has limited transmission distance, communication interconnection must depend on the transmission equipment, the PCM equipment is used in pairs end to end, and the investment cost of network construction is high;
2. the principle of the special private network of the VOIP telephone and the power administrative exchange network is not consistent, the cross interconnection of the administrative exchange network and the office local area network has the risk of being overheard and recorded by network attack, even the administrative exchange telephone network of the whole internal network is possibly paralyzed, and the network security risk is higher.
Disclosure of Invention
Based on the technical problems of higher investment cost for PCM equipment network construction and higher safety risk of the VOIP telephone network in the background technology, the invention provides an optical fiber organization audio access device.
The invention provides an optical fiber organization audio access device, which takes optical fiber as a transmission medium, takes a data circuit channel as a carrier, comprises an access device body, wherein an LC optical port upper connection soft switch platform is arranged on the device body, an Ethernet switch chip is arranged on the LC optical port upper connection soft switch platform, an embedded processor is also connected on the LC optical port upper connection soft switch platform, a security encryption management chip is connected on the embedded processor, an LC interface module is arranged on the LC optical port upper connection soft switch platform, the LC interface module is connected with the optical fiber, an audio DSP is connected on the embedded processor, an audio CODEC and an SLIC circuit are connected on the audio DSP, a telephone is connected on the SLIC circuit, a DSP drive is arranged in the audio DSP, the DSP drive realizes the control of the DSP chip, and the DSP drive part also comprises self-adaptive jitter buffer and packet loss compensation technology, the adaptive jitter buffering and packet loss compensation technique is used for processing time delay, packet loss and jitter existing on a network.
Preferably, the access device body is installed at a terminal access position in a soft switch system, and the access device body mainly faces an access side user, the access device body is provided with processing software, the processing software adopts a modular structure, an operating system adaptation layer is arranged in the processing software, the access device body is provided with an interface module, an ethernet interface is arranged in the interface module, an ethernet driver is arranged in the ethernet interface, and the ethernet driver is used for realizing support for ToS, CoS, ieee802.1p, ieee802.1q and differentiated services.
Preferably, a built-in Proxy is arranged in the access device body, and the built-in Proxy is used for adapting to various types of NAT/FW environments.
Preferably, the access device body is provided with a call control module, an endpoint control module and a resource control module, the call control module, the endpoint control module and the resource control module are used for realizing local user management, state acquisition and call completion according to a call protocol, the call control module is used for managing calls of all ports of the whole IMS terminal, mainly initiating, calling, terminating, transferring call states and performing error processing on the calls, the endpoint control module is used for completing port state acquisition and reporting of change events, and the resource control module is used for controlling resources of the whole device to realize resource allocation and recovery.
Preferably, the access device body comprises an MCU central processing unit, a DSP digital signal processing chip, an audio codec, a FLASH memory chip and an SDRAM memory chip, wherein the MCU central processing unit adopts W90N740 for accelerating the conversion of network data packets; the DSP digital signal processing chip adopts TMS320VC5409, the TMS320VC5409 is suitable for an embedded system capable of running off line, and the audio codec is used for realizing computer programs for compressing and decompressing digital audio data according to a specific audio file format or a streaming media format; the FLASH memory chip is used for storing programs and data; the SDRAM memory chip is a synchronous dynamic random access memory, the synchronous means that the clock frequency is the same as the system clock of a CPU front-end bus, the sending of internal commands and the transmission of data are based on the synchronous dynamic random access memory, the dynamic means that a memory array needs to be continuously refreshed to ensure that the data are not lost, the random means that the data are not stored in sequence linearly, but read and write of the data are carried out by freely assigning addresses, the access device body provides an uplink channel based on an LC optical fiber interface, a downlink channel is a 4-128 FXS interface and an 10/100M Ethernet network management debugging port, the access device body comprises a 4-32 port small-capacity single-board optical fiber networking audio access device and a 64-128 port large-capacity optical fiber networking audio access device, and the access device body is used for supporting the access of three services of voice, digital and image.
The beneficial effects of the invention are as follows:
1. compared with mainstream PCM equipment and VOIP telephone number distribution mode, the optical fiber organization audio access device has a simple structure, and reduces the investment of the optical transmission equipment or switch assets connected to the voice access equipment in an optical fiber direct connection mode.
2. Compared with a VOIP telephone, the optical fiber organization audio access device has the advantages that the access terminal equipment is a common analog telephone, the investment cost of a user terminal is lower than that of the VOIP telephone, and the cost is effectively saved.
3. The optical fiber organization audio access device is of vital importance to the network security of a power system, and the analog telephone adopts the analog signal access of the twin-core telephone line, so that the network security risk is greatly reduced compared with the digital network signal access of the VOIP telephone.
The parts of the device not involved are the same as or can be implemented using prior art.
Drawings
Fig. 1 is a block diagram of the overall structure of an optical fiber organization audio access device according to the present invention;
fig. 2 is a software structure diagram of an optical fiber organization audio access device according to the present invention;
fig. 3 is a built-in Proxy implementation framework diagram of an optical fiber organization audio access device according to the present invention;
fig. 4 is a schematic diagram of a complete device for audio access to fiber organization according to the present invention;
FIG. 5 is a schematic structural diagram of the main logic modules of the FXS of the fiber organization audio access device according to the present invention;
FIG. 6 is a schematic view of a Cpu module plate structure of an optical fiber organization audio access device according to the present invention;
fig. 7 is a schematic structural diagram of a subscriber circuit backplane module of an optical fiber organization audio access apparatus according to the present invention;
fig. 8 is a schematic structural diagram of a network interface module of an optical fiber organization audio access apparatus according to the present invention;
FIG. 9 is a FXS design diagram of an optical fiber organization audio frequency access device according to the present invention;
fig. 10 is a schematic structural diagram of a CPU interface module of an optical fiber organization audio access apparatus according to the present invention;
fig. 11 is a schematic structural diagram of a system interface module of an optical fiber organization audio access device according to the present invention;
fig. 12 is a schematic structural diagram of a system resetting module of an optical fiber tissue audio access device according to the present invention;
fig. 13 is a schematic structural diagram of a system power module of an optical fiber organization audio access device according to the present invention;
fig. 14 is a schematic diagram of a signal transmission process in a circuit diagram of an optical fiber organization audio access device according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of the patented embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present patent, presented in the figures, is not intended to limit the scope of the patent, as claimed, but is merely representative of selected embodiments of the patent.
All other embodiments obtained by a person skilled in the art based on the embodiments in the patent of the invention without any inventive work belong to the protection scope of the patent of the invention.
In the description of the present patent, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present patent and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present patent. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present patent application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present patent can be understood in a specific case by those skilled in the art.
It is well within the skill of those in the art to implement, without undue experimentation, the subject invention as claimed and not related to software and process improvements.
Referring to fig. 1-14, an optical fiber organization audio access device, using optical fiber as transmission medium, using data circuit channel as carrier, includes an access device body, on which there is a LC optical port upper soft switch platform, on which there is an ethernet switch chip, on which there is an embedded processor, on which there is a secure encryption management chip, on which there is an LC interface module, the LC interface module is connected with optical fiber, on which there is an audio DSP, on which there are audio CODEC and SLIC circuit, on which there is a telephone, there is a DSP driver in the audio DSP, which realizes the control of the DSP chip, the DSP driver also includes adaptive jitter buffer and packet loss compensation technology, which is used to process the time delay, data link, and audio loss compensation technology existing on the network, And packet loss and jitter are caused, and the DSP driving part realizes the control of the DSP chip to complete the conversion of RTP and analog voice.
Referring to fig. 1-4, in the present invention, an access device body is installed at a terminal access position in a soft switch system, and the access device body mainly faces an access side user, the access device body is provided with processing software, the processing software adopts a modular structure, and the processing software is provided with an operating system adaptation layer, so as to improve maintainability of upper application codes and reduce workload of code maintenance.
Referring to fig. 2, fig. 3 and fig. 8, in the present invention, an interface module is provided on an access device body, an ethernet interface is provided in the interface module, an ethernet driver is provided in the ethernet interface, the ethernet driver is used for realizing support for ToS, CoS, ieee802.1p, ieee802.1q and differentiated services, a built-in Proxy is provided in the access device body, the built-in Proxy is used for adapting to various types of NAT/FW environments, and a priority control forwarding mechanism for voice streams is realized, so that a good voice quality can be provided for a user under the condition that voice and supervisory data services work simultaneously, and the Proxy mode can be flexibly adapted to various types of NAT/FW environments, thereby facilitating the optical fiber networking audio access device to construct an IP soft switching service platform based on the current mainstream in various network environments.
Referring to fig. 1-14, in the present invention, an access device body is provided with a call control module, an endpoint control module and a resource control module, where the call control module, the endpoint control module and the resource control module are used to implement local user management, state acquisition and complete a call according to a call protocol, the call control module is used to manage calls of all ports of a whole IMS terminal, mainly initiating, calling, terminating, transferring of call states and error processing of the calls, the endpoint control module is used to complete port state acquisition and reporting of change events, and the resource control module is used to implement resource allocation and recovery by resource control of the whole device;
the whole scheme adopts module design, each module completes independent function, the stability is good, the communication interface between the modules is clear, the modules adopt standard interfaces for communication, and the bottom layer operation is avoided being realized by directly using function call. The system adopts an independent resource management module, can effectively manage and monitor software and hardware resources of the optical fiber type voice gateway, and can ensure the support of important services by adopting modes of incoming call limiting, forced releasing and the like through the call control module under the condition that the resources are insufficient due to large load. The IMS calling protocol given to the IP adopts mature protocol stack codes, realizes interconnection and intercommunication according to the mutual passing requirements of different service platforms of the current communication products, modifies and perfects the interconnection and the intercommunication, and can support the service and the requirement on the universality to the utmost extent.
Referring to fig. 1-14, in the present invention, the access device body includes an MCU central processing unit, a DSP digital signal processing chip, an audio codec, a FLASH memory chip, and an SDRAM memory chip, the MCU central processing unit employs a W90N740 for accelerating the conversion of network data packets; the DSP digital signal processing chip adopts TMS320VC5409, the TMS320VC5409 is suitable for an embedded system capable of running off line, and the audio codec is used for realizing computer programs for compressing and decompressing digital audio data according to a specific audio file format or a streaming media format; the FLASH memory chip is used for storing programs and data; the SDRAM memory chip is a synchronous dynamic random access memory, the synchronous means that the clock frequency is the same as the system clock of a CPU front-end bus, the sending of internal commands and the transmission of data are based on the synchronous dynamic random access memory, the dynamic means that a memory array needs to be continuously refreshed to ensure that the data are not lost, the random means that the data are not stored in sequence linearly, but read and write of data are carried out by freely assigning addresses, an access device body provides an uplink channel based on an LC optical fiber interface, a downlink channel is a 4-128 channel FXS interface and an 10/100M Ethernet network management debugging port, the access device body comprises a 4-32 port small-capacity single-board optical fiber networking audio access device and a 64-128 port large-capacity optical fiber networking audio access device, and the access device body is used for supporting the access of three services of voice, digital and image.
The working principle is as follows: the main consideration factors in the aspect of hardware structure design are simplicity, reliability, convenience in installation and maintenance, high safety and reliability, convenience in maintenance and monitoring, rich interfaces and low power consumption. In order to ensure the safety, the telephone subscriber line interface and the power supply interface part are added with lightning protection and static protection, and in order to ensure the reliability of the circuit board, the design of the circuit board considers the electromagnetic compatibility (EMC) requirement and simultaneously considers the thermal stability. The hardware design adopts 32-bit ARM9 and above processors, and the series of processors have high integration level, rich interfaces and low power consumption, and are suitable for embedded application. The external security encryption management module chip ensures the security and reliability of communication. Through the Ethernet switching chip, a complete two-layer switching function is provided, VLAN, Qos, multicast function, spanning tree protocol and the like can be supported, and a user can configure according to actual needs. The telephone interface part adopts a highly integrated SLIC and an audio CODEC chip, the audio coding adopts a special audio processing DSP chip of Audio codes, supports various audio coding specifications such as G.711, G.723.1, G.726, G.729A, G.726 and the like, has an echo suppression function, and can provide high-definition call voice quality. And a plurality of wide area network access modes are supported, including xDSL wired access, EPON/LC optical fiber access and the like, and actual deployment can be selected according to actual conditions.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. An optical fiber organization audio access device takes optical fibers as a transmission medium, a data circuit channel as a carrier, and is characterized by comprising an access device body, wherein an LC optical port upper connection soft switch platform is arranged on the device body, an Ethernet switch chip is installed on the LC optical port upper connection soft switch platform, an embedded processor is further connected on the LC optical port upper connection soft switch platform, a security encryption management chip is connected on the embedded processor, an LC interface module is arranged on the LC optical port upper connection soft switch platform, the LC interface module is connected with the optical fibers, an audio DSP is connected on the embedded processor, an audio CODEC and an SLIC circuit are connected on the audio DSP, a telephone is connected on the SLIC circuit, a DSP drive is arranged in the audio DSP, the DSP drive realizes the control of the DSP chip, and the DSP drive part further comprises self-adaptive jitter buffer and packet loss compensation technologies, the adaptive jitter buffering and packet loss compensation technique is used for processing time delay, packet loss and jitter existing on a network.
2. The fiber optic fabric audio access device according to claim 1, wherein the access device body is installed at a terminal access position in a soft switch architecture, and the access device body mainly faces an access side user.
3. The fiber optic tissue audio access device of claim 1, wherein the access device body is provided with processing software, the processing software is of a modular structure, and an operating system adaptation layer is provided in the processing software.
4. The fiber organization audio access device according to claim 1, wherein the access device body is provided with an interface module, the interface module is provided with an ethernet interface, the ethernet interface is provided with an ethernet driver, and the ethernet driver is used for realizing support for ToS, CoS, ieee802.1p, ieee802.1q and differentiated services.
5. The fiber optic tissue audio access device of claim 1, wherein a built-in Proxy is provided in the access device body, and the built-in Proxy is adapted to various types of NAT/FW environments.
6. The fiber organization audio access device according to claim 1, wherein the access device body is provided with a call control module, an endpoint control module and a resource control module, and the call control module, the endpoint control module and the resource control module are used for realizing local user management, state acquisition and completing a call according to a call protocol.
7. The fiber organization audio access device according to claim 1, wherein the call control module is configured to manage calls of all ports of the entire IMS terminal, mainly call initiation, call termination, call state transfer, and error handling, the endpoint control module is configured to complete port state collection and change event reporting, and the resource control module is configured to implement resource allocation and resource recovery by resource control of the entire device.
8. The fiber organization audio access device according to claim 1, wherein the access device body comprises an MCU central processing unit, a DSP digital signal processing chip, an audio codec, a FLASH memory chip and an SDRAM memory chip, the MCU central processing unit employs a W90N740 for accelerating the conversion of network packets; the DSP digital signal processing chip adopts TMS320VC5409, and the TMS320VC5409 is suitable for an embedded system capable of running off line.
9. The fiber optic fabric audio access device of claim 1, wherein the audio codec is configured to implement a computer program for compressing and decompressing digital audio data according to a specific audio file format or streaming media format; the FLASH memory chip is used for storing programs and data; the SDRAM memory chip is a synchronous dynamic random access memory, wherein synchronous means that the clock frequency is the same as the system clock of a CPU front-end bus, the sending of internal commands and the transmission of data are based on the synchronous dynamic random access memory, dynamic means that a memory array needs to be continuously refreshed to ensure that the data are not lost, and random means that the data are not linearly and sequentially stored but read and write the data by freely assigning addresses.
10. The fiber organization audio access device according to claim 1, wherein the access device body provides an upstream FXS interface based on an LC fiber port and a downstream FXS interface of 4-128 paths and a debugging port of 10/100M ethernet network management, and includes a 4-32 port small-capacity single-board fiber networking audio access device and a 64-128 port large-capacity fiber networking audio access device, and is used for supporting access of three services, namely voice, digital and image.
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| CN202111292554.XA CN114173012A (en) | 2021-11-03 | 2021-11-03 | Audio access device for optical fiber organization |
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| CN202111292554.XA CN114173012A (en) | 2021-11-03 | 2021-11-03 | Audio access device for optical fiber organization |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110063982A1 (en) * | 2009-09-15 | 2011-03-17 | Aztek Networks, Inc. | Access gateway management system |
| CN204291248U (en) * | 2014-10-27 | 2015-04-22 | 广州市天誉创高电子科技有限公司 | A kind of audio-video signal optical fiber transmission device |
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- 2021-11-03 CN CN202111292554.XA patent/CN114173012A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110063982A1 (en) * | 2009-09-15 | 2011-03-17 | Aztek Networks, Inc. | Access gateway management system |
| CN204291248U (en) * | 2014-10-27 | 2015-04-22 | 广州市天誉创高电子科技有限公司 | A kind of audio-video signal optical fiber transmission device |
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