CN201690497U - Network telephone terminal based on telephone communication system of Ethernet - Google Patents
Network telephone terminal based on telephone communication system of Ethernet Download PDFInfo
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- CN201690497U CN201690497U CN2010201820630U CN201020182063U CN201690497U CN 201690497 U CN201690497 U CN 201690497U CN 2010201820630 U CN2010201820630 U CN 2010201820630U CN 201020182063 U CN201020182063 U CN 201020182063U CN 201690497 U CN201690497 U CN 201690497U
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Abstract
The utility model discloses a network telephone terminal based on a telephone communication system of Ethernet, which comprises a DSP main-control unit, a memory and Ethernet interface unit, a call unit, an LCD and keyboard unit. The network telephone terminal is characterized in that: the DSP main-control unit is respectively connected with the memory and Ethernet interface unit, the call unit and the LCD and keyboard unit; the memory and Ethernet interface unit comprises a logic interface circuit, an extended memory and an Ethernet interface circuit; the call unit comprises a PCM encoding/decoding circuit, a telephone receiver/a power amplifier and a microphone/ an HF (hands free); the LCD and keyboard unit comprises an LCD and keyboard interface circuit, a matrix keyboard and an LCD. Through utilizing the network telephone terminal based on the telephone communication system of Ethernet, the network telephone communication system adopting a UDP/IP protocol stack and a prune MGCP call control protocol can be formed. The network telephone communication system has functions of amplification call and telephone talkback, can realize communication for users in network, and can realize communication between users in network and PSTN users outside network through the gateway. The amplification call has call ways such as a single call, a group call and a general call, and can realize production scheduling and broadcasting for people-searching. The largest sound amplification power is 25 W.
Description
Technical field
The utility model relates to a kind of speech communication equipment that is used for network fields such as the Internet, local area network (LAN) and wide area network, relates in particular in the telephonic communication system based on Ethernet a kind of network telephone terminal with access media gateway function.
Background technology
At present, the most of enterprises of China are because many-sided needs such as productions, safety, resource-sharing, the network construction form that has adopted the multiple network such as computer network, telephone communication network, program control scheduling system of independent operating or system in enterprises and deposited.There is strong noise, also will uses telephonic communication system in the production occasion on a large scale in enterprises of integrated mill such as mine, metallurgy, petrochemical industry, coal, cement, weaving, automobile, electromechanics simultaneously with amplifying call and phone intercom function.This network construction form not only needs to drop into a large amount of installation costs, circuit fee and maintenance, repair expense, and a large amount of wirings has brought inconvenience to maintenance, environment is on every side also brought certain influence, had shortcomings such as expense height, poor reliability, use maintenance inconvenience.
Along with popularizing of computer network, local area computer network is all had in each enterprise, and transmission rate can reach 1000Mbit/s, but its abundant bandwidth resources be not fully used, caused the waste of resource.Meanwhile, along with the development of Digital Signal Processing, make the real-time Transmission of voice signal in Ethernet become possibility.
Therefore, need a kind of network telephone terminal equipment that is used to set up based on the telephonic communication system of Ethernet, except realizing and net interior user's communications, and by gateway realization and the outer PSTN user's communications of net, also need to provide the amplifying call function, to be applicable to the production occasion that has very noisy.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of network telephone terminal equipment that is used for based on the telephonic communication system of Ethernet is provided, this network telephone terminal has access media gateway function and general network telephone terminal function simultaneously, communication in not only can realizing netting between the user, and can realize in the net and the outer PSTN telex network of net by gateway, can provide simultaneously the function of amplifying call and phone intercom, to be applicable to the production occasion that has very noisy.
The technical scheme that the utility model adopted is: a kind of network telephone terminal of the telephonic communication system based on Ethernet, comprise DSP main control unit, memory and Ethernet interface unit, telephony unit, LCD and keyboard unit, wherein, the DSP main control unit links to each other with memory and Ethernet interface unit, telephony unit, LCD and keyboard unit respectively; Memory links to each other with Ethernet with the Ethernet unit.
Described DSP main control unit adopts the UDP/IP protocol stack, and has used the MGCP call control protocol of cutting to communicate.
Described memory and Ethernet interface unit include logic interfacing circuit, extended menory and the ethernet interface circuit that links to each other successively.
Described telephony unit includes successively the PCM coding-decoding circuit, receiver/power amplifier and the microphone that link to each other/hands-free.
Described LCD and keyboard unit include LCD and keyboard interface circuit, matrix keyboard and the LCD that links to each other successively.
Implement the technical solution of the utility model, have following beneficial effect: have amplifying call and phone intercom function, can either with the telex network in the network call communication system, again can be by Tandem Gateway and the outer PSTN telex network of net.Amplifying call has individual calling, grouies busy, generally calls three kinds of method of callings, can realize functions such as production scheduling and page; Amplifying to be used with intercommunication function can be used to communicate that contact, equipment work data are reported and telephone communication etc., goes for the production occasion of very noisy.
Description of drawings
Fig. 1 is an applied environment schematic diagram of the present utility model;
Fig. 2 is a hardware block diagram of the present utility model;
Fig. 3 is the structured flowchart of memory and Ethernet interface unit;
Fig. 4 is the structured flowchart of telephony unit;
Fig. 5 is the structured flowchart of LCD and keyboard unit;
Fig. 6 is the circuit theory diagrams of DSP main control unit;
Fig. 7 is the circuit theory diagrams of logic interfacing circuit;
Fig. 8 is the circuit theory diagrams of extended menory;
Fig. 9 is the circuit theory diagrams of ethernet interface circuit;
Figure 10 is the circuit theory diagrams of telephony unit;
Figure 11 is the circuit theory diagrams of LCD and keyboard interface circuit.
Embodiment
Make a detailed description below in conjunction with the accompanying drawing of embodiment network telephone terminal the telephonic communication system based on Ethernet of the present utility model.
Fig. 1 is an applied environment schematic diagram of the present utility model.As shown in Figure 1, network telephone terminal, media gateway controller MGC, gateway and network management system have wherein been showed.Network telephone terminal inside has comprised the function of access media gateway (MG); Media gateway controller MGC inside has comprised the MGCP server, and basic calling control business is provided; Gateway is responsible for the butt joint with outside pstn telephone network; Network management system is responsible for the network management of telephonic communication system.
Individual calling in can realizing netting by media gateway controller MGC in net based on the network telephone terminal of the telephonic communication system of Ethernet, the amplifying call of grouping busy and generally calling.Individual calling refers to the calling that the calling subscriber carries out the called subscriber of an appointment, and it is realized by calling subscriber dialing individual calling number; Group busy the calling that refers to that the calling subscriber carries out one group of called subscriber, it grouies busy the number realization by calling subscriber dialing; Generally call the calling that refers to that the calling subscriber carries out all called subscribers, it generally calls number by calling subscriber dialing and realizes.Group busy that wherein number is 901-999, generally calling number is 900.Network telephone terminal can also need first dial-out office's prefix " 0 " by gateway and the outer PSTN telex network of net when as the calling subscriber, hear to dial behind the secondary dial tone again and net outer user's number.
Network telephone terminal based on the telephonic communication system of Ethernet utilizes media gateway controller MGC, can realize and the docking of PSTN by gateway.
Fig. 2 is a hardware block diagram of the present utility model.As shown in Figure 2, the network telephone terminal based on the telephonic communication system of Ethernet comprises DSP main control unit, memory and Ethernet interface unit, telephony unit, LCD and keyboard unit.Wherein the DSP main control unit adopts dsp chip, realizes functions such as compress speech and calling control; Memory and Ethernet interface unit are realized to the expansion of the memory space of dsp chip with to the control of Ethernet interface (comprise address decoding, network interface resets and interruption etc.); Telephony unit realizes 8 PCM encoding and decoding and amplifying call and phone intercom function.LCD and keyboard unit send user's dialing information to the DSP main control unit by Single-chip Controlling, receive simultaneously to comprise call informations such as dislodging machine state and talking state, and show on LCD.
Fig. 3 is the structured flowchart of memory and Ethernet interface unit.As shown in Figure 3, memory and Ethernet interface unit include logic interfacing circuit, extended menory and the ethernet interface circuit that links to each other successively.Wherein adopt CPLD to realize that DSP (comprises address decoding to the control of extended menory and Ethernet interface in the logic interfacing circuit, network interface resets and interruption etc.) and produce the needed clock of PCM codec, dislodging machine signal is also delivered to DSP by the logic interfacing circuit.Extended menory is mainly used in to be expanded the memory space of DSP, and it comprises SDRAM and FLASH, is used to the temporary data of the program of depositing and constant and program running needs.The Frame that ethernet interface circuit receives broadcast data frame and is complementary with own MAC Address sends the ip voice packet simultaneously.
Fig. 4 is the structured flowchart of telephony unit.As shown in Figure 4, telephony unit includes successively the PCM coding-decoding circuit, receiver/power amplifier and the microphone that link to each other/hands-free.The PCM coding-decoding circuit carries out 8 pcm encoders with microphone/hands-free analog voice that transmits, and is sent to DSP and carries out G.729 compression algorithm, will be decoded into analog voice through 8 PCM of algorithm decompress(ion) G.729 and be delivered to receiver/power amplifier by what DSP transmitted simultaneously.And after the conversation connection was set up, the called state that amplifies acquiescence was opened, and when called off-hook, amplifying stops.
Fig. 5 is the structured flowchart of LCD and keyboard unit.As shown in Figure 5, LCD and keyboard unit include LCD and keyboard interface circuit, matrix keyboard and the LCD that links to each other successively.LCD and keyboard interface circuit mainly are made of single-chip microcomputer, be used to control slow device LCD and keyboard, in order to avoid interrupt the high-speed cruising of DSP, send user's dialing information to the DSP main control unit, reception simultaneously comprises call informations such as dislodging machine state and talking state, and shows on LCD.
Fig. 6 is DSP main control unit circuit theory diagrams.In the specific implementation process, it is the dsp chip of TMS320VC5402 that dsp chip can adopt model.
Fig. 7 is the circuit theory diagrams of logic interfacing circuit.As shown in Figure 7, the logic interfacing circuit is made up of frequency dividing circuit, I/O expanded circuit and address decoding circuitry.By the I/O expanded circuit, DSP may command ethernet controller, DSP reset, this machine user of detection sets out the machine state, it is hands-free to select or amplify, open the power amplifier power supply.In the specific implementation process, it is the CPLD chip of MAXII EPM240T100C5 that the logic interfacing chip can adopt model.
Fig. 8 is the circuit theory diagrams of extended menory.As shown in Figure 8, extended menory comprises SDRAM and FLASH, is mainly used in the memory space of DSP is expanded, and SDRAM is mainly used in data and the code of depositing in the program operation process; FLASH is mainly used in the program curing code, when powering in system, adopts the loaded in parallel mode that program code is moved internal RAM.In the specific implementation process, it is the SDRAM chip of IS61LV25616 that the SDRAM chip can adopt model, and it is the FLASH chip of SST39VF400A that the FLASH chip can adopt model.
Fig. 9 is the circuit theory diagrams of ethernet interface circuit.In the specific implementation process, it is the ethernet controller chip of DM9000 that the ethernet controller chip can adopt model.As shown in Figure 6, DSP can only realize operation to ethernet controller by FPDP DATA and address port INDEX.Ethernet controller is receiving ethernet frame, after inner CRC check, can trigger the network interface interrupted of DSP, DSP responds interruption, and the packet that ethernet controller is received is read from reception data buffer and given the upper-layer protocol processing; Ethernet controller writes data to be sent and sends the data buffer zone when sending data, after ethernet controller detects data that DSP sends and sends signal, convert the packet that writes buffering area to ethernet frame and send, when sending, can also continue to receive writing of packet.
Figure 10 is the telephony unit circuit theory diagrams.In the specific implementation process, it is the audio signal interface chip of MC145480 that the audio signal interface chip in the PCM coding-decoding circuit can adopt model, and the power amplifier chip in the power amplifier can adopt model LM386 power amplifier chip.As shown in Figure 7, the PCM coding-decoding circuit carries out 8 pcm encoders with microphone or the hands-free analog voice that transmits, and is sent to DSP and carries out G.729 compression algorithm, will be decoded into analog voice through 8 PCM of algorithm decompress(ion) G.729 and be delivered to receiver or power amplifier by what DSP transmitted.The amplifying of telephone terminal selected and hands-free selection mode is that input signal by CPLD determines.Be in the state of amplifying and hands-free state during the relay normally open state, then take over the receiver and the transmitter of handle during normally off.When software detection arrives called subscriber's off-hook, by the control relay closure, stop to amplify, connect the microphone of handle.
Figure 11 is the circuit theory diagrams of LCD and keyboard interface circuit.In the specific implementation process, it is the single-chip microcomputer of MSP430F149 that single-chip microcomputer can adopt model.Single-chip microcomputer sends user's dialing information to DSP, and DSP will comprise that then call informations such as dislodging machine state and talking state send single-chip microcomputer to, shows content corresponding by Micro Controller Unit (MCU) driving LCD.
The course of work based on the network telephone terminal of the telephonic communication system of Ethernet is described below: DSP receives ethernet frame by the interruption that Ethernet interface triggers, extract the IP bag according to the UDP/IP protocol stack, resolve and obtain from the control data of media gateway controller MGC or from the speech data of target terminal.If control datas such as the notice request of media gateway controller MGC, establishment connection, modification connection, deletion connection, then DSP is according to the MGCP protocol processes of cutting, if the speech data of target terminal, then according to algorithm decompress(ion) G.729, convert analog voice signal to through PCM codec D/A again and amplify by receiver or power amplifier and send to the user.
Carry out the A/D conversion from microphone or the hands-free user speech analog signal that obtains by the PCM codec, deliver to DSP after being converted into pcm encoder, through G.729 compression, finally be packaged into ethernet frame according to the UDP/IP protocol stack again and send to target terminal, will register, control data such as notice directly is packaged into the IP bag according to the UDP/IP protocol stack and sends to media gateway controller MGC through Ethernet interface.
Single-chip microcomputer receives the number that the user dialled and also is sent to DSP, by the DSP judgement be off-net call, individual calling, group busy, generally call, PTT or this machine information is set, and handle accordingly.The dislodging machine state of target terminal and this machine talking state will show by monolithic processor controlled LCD in the whole communication process.
Claims (5)
1. network telephone terminal based on the telephonic communication system of Ethernet, it is characterized in that, comprise DSP main control unit, memory and Ethernet interface unit, telephony unit, LCD and keyboard unit, wherein, the DSP main control unit links to each other with Ethernet interface unit, telephony unit, LCD and keyboard unit with memory respectively; Memory and Ethernet interface unit link to each other with Ethernet by Ethernet interface.
2. the network telephone terminal of the telephonic communication system based on Ethernet according to claim 1 is characterized in that, described memory and Ethernet interface unit include logic interfacing circuit, extended menory and the ethernet interface circuit that links to each other successively.
3. the network telephone terminal of the telephonic communication system based on Ethernet according to claim 1 is characterized in that, described telephony unit includes the PCM coding-decoding circuit, receiver/power amplifier and the microphone that link to each other successively/hands-free.
4. the network telephone terminal of the telephonic communication system based on Ethernet according to claim 1 is characterized in that, described LCD and keyboard unit include LCD and keyboard interface circuit, matrix keyboard and the LCD liquid crystal display that links to each other successively.
5. the network telephone terminal of the telephonic communication system based on Ethernet according to claim 1 is characterized in that, described DSP main control unit adopts the UDP/IP protocol stack, and uses the MGCP call control protocol of cutting to communicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201820630U CN201690497U (en) | 2010-05-07 | 2010-05-07 | Network telephone terminal based on telephone communication system of Ethernet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201820630U CN201690497U (en) | 2010-05-07 | 2010-05-07 | Network telephone terminal based on telephone communication system of Ethernet |
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| CN201690497U true CN201690497U (en) | 2010-12-29 |
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| CN2010201820630U Expired - Lifetime CN201690497U (en) | 2010-05-07 | 2010-05-07 | Network telephone terminal based on telephone communication system of Ethernet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231463A (en) * | 2017-07-14 | 2017-10-03 | 天津工业大学 | The networking telephone of belt conveyor monitoring system based on Ethernet |
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2010
- 2010-05-07 CN CN2010201820630U patent/CN201690497U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231463A (en) * | 2017-07-14 | 2017-10-03 | 天津工业大学 | The networking telephone of belt conveyor monitoring system based on Ethernet |
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Granted publication date: 20101229 |
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| CX01 | Expiry of patent term |