CN1780268A - Speech gateway for connecting PSTN and IP network - Google Patents
Speech gateway for connecting PSTN and IP network Download PDFInfo
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- CN1780268A CN1780268A CN 200410084631 CN200410084631A CN1780268A CN 1780268 A CN1780268 A CN 1780268A CN 200410084631 CN200410084631 CN 200410084631 CN 200410084631 A CN200410084631 A CN 200410084631A CN 1780268 A CN1780268 A CN 1780268A
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Abstract
The invention consists of E1 interface card, voice-processing module, signaling process and control module, and Ethernet frame switch and forwarding module. The E1 interface card is used to access PSTN. The voice process module connects to E1 interface card through time division multiplex bus. The signaling process and control module connects to E1 interface card through system bus. The Ethernet frame switch and forwarding module separately connects to voice process module, signaling process, and control module through Ethernet, and is used in making Ethernet frame switch between incoming- interface network and IP network.
Description
Technical field
The present invention relates to the voice communication field, particularly a kind of voice gateways that connect PSTN and IP network.
Background technology
Being connected as shown in Figure 1 between traditional FXO FXO (Foreign Exchange Office) and the FXS FXS (Foreign Exchange Station) (that SuperB_1 connects among the figure is FXS, and that SuperB_2 connects is FXO).Though this connection can realize the access of PSTN (PublicSwitched Telephone Network-Public Switched Telephony Network) to Internet (the Internet), but, this connection is for a FXO interface, because the restriction of the connection of physics can only be used for No. one phone.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, the voice gateways of a kind of PSTN of connection and IP network are provided, to realize the access of multiplex telephony from PSTN to the IP network.
For achieving the above object, the invention provides the voice gateways of a kind of PSTN of connection and IP network, comprising:
The E1 interface card is used to insert PSTN;
Speech processing module inserts the E1 interface card by the time division multiplexing bus, is used for speech processes, to voice packet encapsulation/parsing and detection/generation dual-tone multifrequency;
Signaling process and control module insert the E1 interface card by system bus, are used for signaling process and control E1 interface card, speech processing module;
The exchange forwarding module of ethernet frame is connected with control module, speech processing module with signaling process through Ethernet interface respectively, and is used to insert IP network and this IP network and carries out the ethernet frame exchange.
Described E1 interface card is provided with the individual E1 interface of N (N is a positive integer), and each E1 interface has 32 time slots.
When described E1 interface utilized R2 signaling, the 0th time slot was used for the transmission of synchronizing signal, and the 16th time slot is used for the transmission of abed signaling, and all the other 30 time slots are used for the transmission of data.
When described E1 interface utilized the Pri signaling, the 0th time slot was used for the transmission of synchronizing signal, and the 16th time slot is used for the transmission of pri signaling, and all the other 30 time slots are used for the transmission of data.
Described signaling process and control module are by CSM ENCAPS agreement control speech processing module.
When described voice gateways insert IP network with PSTN, the E1 interface card detects the call request of PSTN and by system bus solicited message is sent to signaling process and control module, speech processing module will be delivered to signaling process and control module by detected dual-tone multifrequency signaling on the time division multiplexing bus, signaling process and control module are passed through CSM ENCAPS agreement to time slot of speech processes mould application and with solicited message, dual-tone multifrequency signaling is packaged into signaling packet, exchange forwarding module through ethernet frame transfers to IP network, treat promptly to set up conversation after the called party confirms, transmit the voice message of IP network and speech processing module by the exchange forwarding module of ethernet frame.
The present invention can directly be connected with PBX (Private Branch Exchange one private branch exchange) by the E1 interface card is set, and utilizes R2 signaling or Pri signaling, has realized the access of multiplex telephony from PSTN to the IP network.
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 inserts the network topological diagram of IP network for existing PSTN.
Fig. 2 is a structured flowchart of the present invention.
Fig. 3 inserts a network topological diagram of VoIP communication from PSTN to the IP network for the present invention.
Fig. 4 inserts another network topological diagram of VoIP communication from PSTN to the IP network for the present invention.
Embodiment
As shown in Figure 2, the present invention voice gateways GW of connecting PSTN and IP network comprises the exchange forwarding module 4 of E1 interface card 1, speech processing module 2, signaling process and control module 3 and ethernet frame.Wherein E1 interface card 1 is connected with speech processing module 2 by time division multiplexing bus TDM (Time-divisionMultiplexing) Bus, is connected with control module 3 with signaling process by system bus System Bus.The exchange forwarding module 4 of speech processing module 2, signaling process and control module 3 and ethernet frame links to each other in twos through Ethernet interface respectively.
E1 interface card 1 is used to insert PSTN, is provided with one or more E1 interfaces, can support 4 E1 interfaces as present embodiment, each E1 interface has 32 time slots, when the E1 interface utilized R2 signaling, the 0th time slot was used for the transmission of synchronizing signal, and the 16th time slot is used for the transmission of abcd signaling; When the E1 interface utilized the Pri signaling, the 16th time slot was used for the transmission of pri signaling.No matter the utilization of E1 interface is R2 signaling or Pri signaling, all its 30 time slots is used for the transmission of data, and each time slot can be realized the access of the road phone of PSTN, and promptly a time slot that is used for transfer of data is equivalent to a FXO interface.This E1 interface card can adopt the E1 interface card of models such as WIC-1CE1, WIC-2CE1.
2 of speech processing module are used for speech processes, dual-tone multifrequency signalling tones such as (dual tone multi frequency are called for short DTMF) is resolved and detected and produces in encapsulation to voice packet.In the present embodiment, this speech processing module 2 is a core with the Chagall/Miro chip, can adopt chips such as Chagall 82520, Chagall 82530, Miro 82610 to realize.
Signaling process and control module 3 are used for signaling process and control E1 interface card 1, speech processing module 2.This signaling process and control module 3 are followed the CSM_ENCAPS agreement, control with data by 4 pairs of speech processing module 2 of exchange forwarding module of ethernet frame and transmit, and control its startup, initialization and firmware downloads.In the present embodiment, signaling process and control module 3 are core with the MPC8250 chip, and it also can adopt chips such as MPC8245, MPC8260 to realize certainly.
The exchange forwarding module 4 of ethernet frame is used to insert IP network and carries out the ethernet frame exchange with this IP network.The exchange forwarding module 4 of this ethernet frame can insert IP network by its Ethernet interface, the voice packet of speech processing module 2 transmission and the signaling packet of signaling process and control module 3 transmission are sent into IP network, also receive the IP bag of IP network input, type and UDP (User DataProtocol according to the IP bag, User Datagram Protoco (UDP)) information Recognition signaling packet and voice packet wherein such as port numbers, signaling packet is forwarded to signaling process and control module 3, voice packet is forwarded to speech processing module 2.In the present embodiment, the exchange forwarding module of ethernet frame is core with MPC8250, and its forward-path is two Ethernet interfaces, promptly is connected with speech processing module 2, signaling process and control module 3 through a 100M Ethernet respectively.Also available other chip of the exchange forwarding module of this ethernet frame is realized, as MPC8245, MPC8260 etc.
During system start-up of the present invention, signaling process and control module 3 by the CSM_ENCAPS agreement with speech processing module 2 initialization.After the E1 of E1 interface card 1 interface detects PSTN and sends call request, solicited message is sent to signaling process and control module 3 by system bus System Bus; Then speech processing module 2 will be delivered to signaling process and control module 3 through the exchange forwarding module 4 of ethernet frame by detected dtmf signaling on time division multiplexing bus TDM Bus; Signaling process and control module 3 utilize the exchange forwarding module 4 of CSM_ENCAPS agreement by ethernet frame to time slot of speech processes mould 2 applications, are used for the laggard words that work that connect with the called party; Afterwards, signaling process and control module 3 are packaged into signaling packet with solicited message, dtmf signaling, transfer to IP network through the exchange forwarding module 4 of ethernet frame, treat promptly to set up conversation after the called party confirms.During conversation, the exchange forwarding module 4 of ethernet frame receives its Ethernet interface from IP network voice message is forwarded to speech processing module 2, and the voice message that speech processing module 2 is produced is forwarded to IP network from its Ethernet interface.
Thus, the signaling of telephony signaling and IP network is transmitted between function such as voice service stream that the present invention can realize carrying on the IP network and the encoding and decoding between the pstn telephone speech, packing, delay variation filtering and PSTN and the IP network, guarantee message and control information reliable delivery in Packet Based Network, and be connected with direct PBX (Private Branch Exchange-private branch exchange) by its E1 interface card, finally can realize the access of multiplex telephony from PSTN to the IP network.
Fig. 3 is for the present invention inserts a network topological diagram of VoIP communication from PSTN to the IP network, realized voice gateways GW of the present invention and connect calling between the IAD (Integrated Access Device, integrated access equipment) of FXS.When E 1 interface is R2 signaling, if extension set 2001 initiatively makes a call, after PBX detects off hook signal, by abcd notice voice gateways GW1, by exchange of speech called number is being delivered to voice gateways GW1 then, voice gateways GW1 connects to logical again h323 agreement after mating called number and dialing to far-end.When the E1 interface was the Pri signaling, if extension set 2001 initiatively makes a call, PBX sent the Q931setup message to voice gateways GW1, and voice gateways GW1 converts this setup message the setup of h323 to then, set up with far-end and called out.
Fig. 4 has realized voice gateways GW of the present invention and tape relay mouth (FXS/E﹠amp for the present invention inserts VoIP communication from PSTN to the IP network another network topological diagram; M/E1) calling between the IAD.
Claims (7)
1, a kind of voice gateways that connect PSTN and IP network is characterized in that comprising:
The E1 interface card is used to insert PSTN;
Speech processing module inserts the E1 interface card by the time division multiplexing bus, is used for speech processes, to voice packet encapsulation/parsing and detection/generation dual-tone multifrequency;
Signaling process and control module insert the E1 interface card by system bus, are used for signaling process and control E1 interface card, speech processing module; And
The exchange forwarding module of ethernet frame is connected with speech processing module, signaling process and control module through Ethernet interface respectively, and is used to insert IP network and this IP network and carries out the ethernet frame exchange.
2, voice gateways according to claim 1 is characterized in that described E1 interface card is provided with the individual E1 interface of N (N is a positive integer), and each E1 interface has 32 time slots.
3, voice gateways according to claim 2, when it is characterized in that described E1 interface utilizes R2 signaling, the 0th time slot is used for the transmission of synchronizing signal, and the 16th time slot is used for the transmission of abcd signaling, and all the other 30 time slots are used for the transmission of data.
4, voice gateways according to claim 2, when it is characterized in that described E1 interface utilizes the Pri signaling, the 0th time slot is used for the transmission of synchronizing signal, and the 16th time slot is used for the transmission of pri signaling, and all the other 30 time slots are used for the transmission of data.
5, voice gateways according to claim 1 is characterized in that described signaling process and control module are by CSM_ENCAPS agreement control speech processing module.
6, voice gateways according to claim 1 or 5 is characterized in that described signaling process and the control module exchange forwarding module control speech processing module by ethernet frame.
7, according to claim 1,2,3 or 4 described voice gateways, when it is characterized in that PSTN inserted IP network, the E1 interface card detects the call request of PSTN and by system bus solicited message is sent to signaling process and control module, speech processing module will be delivered to signaling process and control module by detected dual-tone multifrequency signaling on the time division multiplexing bus, signaling process and control module are passed through the CSM_ENCAPS agreement to time slot of speech processes mould application and with solicited message, dual-tone multifrequency signaling is packaged into signaling packet, exchange forwarding module through ethernet frame transfers to IP network, treat promptly to set up conversation after the called party confirms, transmit the voice message of IP network and speech processing module by the exchange forwarding module of ethernet frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410084631 CN1780268A (en) | 2004-11-26 | 2004-11-26 | Speech gateway for connecting PSTN and IP network |
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| CN 200410084631 CN1780268A (en) | 2004-11-26 | 2004-11-26 | Speech gateway for connecting PSTN and IP network |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883299A (en) * | 2010-03-19 | 2010-11-10 | 福建三元达软件有限公司 | Method for realizing telecommunication based on PSTN and following V.23FSK transport protocol |
| WO2011143954A2 (en) * | 2011-01-31 | 2011-11-24 | 华为技术有限公司 | Data processing method, communication system and data processing gateway |
| CN102355412A (en) * | 2011-08-26 | 2012-02-15 | 福建星网锐捷网络有限公司 | Method and equipment for transmitting voice call request |
| CN104284035A (en) * | 2013-07-01 | 2015-01-14 | 深圳市共进电子股份有限公司 | Calling control method and device |
| CN108566574A (en) * | 2018-02-26 | 2018-09-21 | 柳州达迪通信技术股份有限公司 | A kind of multichannel signaling acquisition device and its acquisition method |
| WO2019061070A1 (en) * | 2017-09-27 | 2019-04-04 | 华为技术有限公司 | User equipment access method and apparatus for use with r2 device |
-
2004
- 2004-11-26 CN CN 200410084631 patent/CN1780268A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883299A (en) * | 2010-03-19 | 2010-11-10 | 福建三元达软件有限公司 | Method for realizing telecommunication based on PSTN and following V.23FSK transport protocol |
| WO2011143954A2 (en) * | 2011-01-31 | 2011-11-24 | 华为技术有限公司 | Data processing method, communication system and data processing gateway |
| WO2011143954A3 (en) * | 2011-01-31 | 2012-01-12 | 华为技术有限公司 | Data processing method, communication system and data processing gateway |
| CN102355412A (en) * | 2011-08-26 | 2012-02-15 | 福建星网锐捷网络有限公司 | Method and equipment for transmitting voice call request |
| CN104284035A (en) * | 2013-07-01 | 2015-01-14 | 深圳市共进电子股份有限公司 | Calling control method and device |
| CN104284035B (en) * | 2013-07-01 | 2018-08-14 | 深圳市共进电子股份有限公司 | Calling-control method and device |
| WO2019061070A1 (en) * | 2017-09-27 | 2019-04-04 | 华为技术有限公司 | User equipment access method and apparatus for use with r2 device |
| CN108566574A (en) * | 2018-02-26 | 2018-09-21 | 柳州达迪通信技术股份有限公司 | A kind of multichannel signaling acquisition device and its acquisition method |
| CN108566574B (en) * | 2018-02-26 | 2024-04-16 | 柳州达迪通信技术股份有限公司 | Multipath signaling acquisition device and acquisition method thereof |
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