CN101217603B - A device to transfer IP voice into TDM voice and corresponding snooping method - Google Patents
A device to transfer IP voice into TDM voice and corresponding snooping method Download PDFInfo
- Publication number
- CN101217603B CN101217603B CN2008100556680A CN200810055668A CN101217603B CN 101217603 B CN101217603 B CN 101217603B CN 2008100556680 A CN2008100556680 A CN 2008100556680A CN 200810055668 A CN200810055668 A CN 200810055668A CN 101217603 B CN101217603 B CN 101217603B
- Authority
- CN
- China
- Prior art keywords
- voice
- network element
- module
- tdm
- signaling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a device to converse IP voice to TDM voice and is applied to a system at least comprising a monitoring network element and a legal monitoring center. The device consists of a signal processing module applied to receiving an IP voice signal sent by the monitoring network element, generating and sending a TDM voice signal according to the IP voice signal to the legal monitoring center, a media conversion module applied to carrying out media conversion processing according to the control of the signal processing module after receiving the IP voice packet sent by the monitoring network element and sending the TDM voice flow converted from the IP voice packet to the legal monitoring center. Correspondingly, the invention also provides a method for converting the IP voice to TDM voice for monitoring. Therefore, the invention ensures that the legal monitoring center can monitor TDM voice and IP voice at the same time, thereby expanding the monitoring scale of the legal monitoring center.
Description
Technical field
The present invention relates to the monitoring technique of the communications field, relate in particular to a kind of device and monitor method thereof that ip voice is converted to the TDM voice.
Background technology
In recent years, development along with the International Politics form, LIC (Lawful Inforination Center, legal monitor centers) more and more paid attention to by each nation's security department, become and safeguard national security, obtain a kind of effective means of obtaining with information that communication network is monitored of necessary national security information.According to ETSI (European Telecommunications Sdandards Institute, ETSI) monitors model, at LIC with between by the monitoring network element, also has a snoop agents equipment, here be referred to as LIG (Lawful Inforination Gateway, Lawful interception gateway).
LIC concentrates on (the Time Division Multiplex to traditional TDM, time division multiplexing) monitoring of network, continuous development along with the communication technology, second generation mobile communication technology, NGN (NextGeneration Networking, next generation network) communication technology and 3G development of Communication Technique, make the client have higher requirement, require LIC can realize monitoring mobile network, NGN network and 3G network etc. to the covering field of LIC.
Various communication network has often defined different monitoring protocols.For example, China, PSTN (Public Switched Telephone Network, public switch telephone network) network has " fixed network calling of switchboard transfer service technical specification ", GSM (Global System of Mobile communication, global system for mobile communications) network can use " TDMA digital cellular mobile communication systems policing interface (lawful interception interface) technical specification ", CDMA (Code Division Muitiple Access, code division multiple access) network can use " CDMA2000 digital cellular mobile communication systems policing interface (lawful interception interface) technical specification ", and the NGN network can be with " specification requirement of soft switchcall server policing interface (lawful interception interface) " etc.
But a lot of audio monitorings of also just supporting the TDM mode of legal monitor centers that present stage uses, development along with technology, the voice communication of IP mode is more and more general, and be the trend of communicating by letter from now on, it is more and more urgent how to allow the legal monitor centers of TDM mode can continue to realize that audio monitoring to the IP mode has become.
In summary, the existing communication monitoring technique obviously exists inconvenience and defective on reality is used, so be necessary to be improved.
Summary of the invention
At above-mentioned defective, the object of the present invention is to provide a kind ofly to convert ip voice the device and the monitor method thereof of TDM voice to, it makes legal monitor centers can monitor TDM voice and ip voice simultaneously, thereby has expanded the monitoring scope of legal monitor centers.
To achieve these goals, the invention provides and a kind ofly convert ip voice the device of TDM voice to, be used for comprising at least one system of being monitored network element and legal monitor centers, described device comprises:
The signaling receiver module is used to receive the described ip voice signaling of being sent by the monitoring network element, and this ip voice signaling is sent to described signaling processing module;
Signaling processing module is used for generating the TDM voice signaling according to this ip voice signaling and sending to described legal monitor centers after receiving the described ip voice signaling of being sent by the monitoring network element;
The medium receiver module is used to receive the described ip voice bag of being sent by the monitoring network element, and this ip voice bag is sent to described media conversion module;
Media conversion module, be used for receive described monitored the ip voice bag that network element sends after, carry out media conversion according to the control of described signaling processing module and handle, and send to described legal monitor centers after converting this ip voice bag to the TDM voice flow;
Described signaling processing module comprises ip voice signaling processing sub-module and TDM voice signaling processing sub:
Described ip voice signaling processing sub-module, after being used to receive that the ip voice of being monitored network element is called out beginning message, the resource of application media conversion resource and medium receiver module, after this resource bid success, send Indication message to described TDM voice signaling processing sub and medium receiver module respectively, the address information with this medium receiver module sends to described by the monitoring network element simultaneously;
Described TDM voice signaling processing sub is used for generating the TDM audio call according to this Indication message of receiving and begins message, and the application relay resource, by this relaying this TDM audio call is begun message and sends to described legal monitor centers;
Described monitored network element and received the address information of this medium receiver module that this ip voice signaling processing sub-module is sent after, send the ip voice bag to this medium receiver module;
Described medium receiver module is used for after receiving this Indication message that this ip voice signaling processing sub-module is sent this ip voice bag being sent to described media conversion module;
Described media conversion module is used for the control according to described signaling processing module, converts this ip voice bag to the TDM voice flow, and the application relay resource, by this relaying described TDM voice flow is sent to described legal monitor centers again;
Described ip voice signaling processing sub-module, also be used for after receiving the described ip voice release message that sends when being monitored network element at the ip voice end of conversation, the media conversion resource that release is applied for and the resource of medium receiver module, and send the release Indication message for TDM voice signaling processing sub;
Described TDM voice signaling processing sub also is used for generating TDM voice release message according to this release Indication message, and by described relaying this TDM voice release message is sent to described legal monitor centers, discharges the relay resource of being applied for then.
According to device of the present invention, described ip voice signaling is the SIP signaling, and described TDM voice signaling is a signalling system No.7; And described ip voice signaling processing sub-module is the SIP signaling processing sub-module, and described TDM voice signaling processing sub is the signalling system No.7 processing sub.
According to device of the present invention, described ip voice signaling processing sub-module, be used for after the ip voice conversation is set up, receive described request of being monitored the resource of modification media conversion resource that network element sends and/or medium receiver module, and judge whether to change resource, if need, then the address information with the new media receiver module sends to by the monitoring network element.
According to device of the present invention, described is PSTN network element, GSM network element, CDMA network element, WCDMA network element, TD-SCDMA network element or NGN network element by monitoring network element.
The present invention also provides a kind of ip voice is converted to the method that the TDM voice are monitored, and comprising:
The signaling process step after receiving the described ip voice signaling of being sent by the monitoring network element, generates the TDM voice signaling according to this ip voice signaling and sends to described legal monitor centers;
The media conversion step, receive described monitored the ip voice bag that network element sends after, carry out media conversion according to the control of described signaling process step and handle, and send to described legal monitor centers after converting this ip voice bag to the TDM voice flow.
The present invention receive monitored the ip voice signaling and ip voice bag that network element sends after, convert this ip voice signaling and ip voice bag to corresponding TDM voice signaling and TDM voice flow respectively after, send to legal monitor centers and realize audio monitoring.Whereby, the invention enables legal monitor centers can utilize general mechanism, monitor the speech business of being monitored network element of TDM mode and IP mode simultaneously, solved the monitoring problem of ip voice effectively, expanded the monitoring scope of legal monitor centers.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram that ip voice provided by the invention converts the TDM voice to;
Fig. 2 is that ip voice provided by the invention converts the method flow diagram that the TDM voice are monitored to;
Fig. 3 is that the preferred ip voice of the present invention converts the method flow diagram that the TDM voice are monitored to.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Basic thought of the present invention is: after receiving the ip voice signaling of being sent by the monitoring network element and ip voice bag, after this ip voice signaling and ip voice bag being converted to corresponding TDM voice signaling and TDM voice flow respectively, send to legal monitor centers and realize audio monitoring.
Fig. 1 shows the apparatus structure that ip voice provided by the invention converts the TDM voice to, this conversion equipment 10 is used for comprising at least one system of being monitored network element 20 and legal monitor centers (LIC) 30 as monitoring interface, it will be monitored network element 20 and be linked to each other with legal monitor centers 30, described conversion equipment 10 includes signaling processing module 11 and media conversion module 12 at least, wherein:
Signaling processing module 11, be responsible for processing and explanation that butt joint is collected mail and made, after receiving the described ip voice signaling of being sent by monitoring network element 20, generate the TDM voice signaling according to this ip voice signaling and send to legal monitor centers 30, and control media conversion module 12 is carried out the media conversion processing.Described signaling processing module 11 is responsible for safeguarding and at least one signalling path of being monitored between the network element 20, and the signalling path between maintenance and control and at least one legal monitor centers 30, medium are transmitted and are subjected to signaling processing module 11 controls, and carry out the forwarding of media data according to the port that signaling processing module 11 provides.
Preferably, described signaling processing module 11 further comprises: ip voice signaling processing sub-module 111 and TDM voice signaling processing sub 112.
Described ip voice signaling processing sub-module 111 is used to handle this ip voice signaling, and sends Indication message to TDM voice signaling processing sub 112 according to this ip voice signaling.
Described TDM voice signaling processing sub 112, the Indication message that is used for sending according to described ip voice signaling processing sub-module 111 generates corresponding TDM voice signaling, and dock with legal monitor centers 30, so that described TDM voice signaling is sent to this legal monitor centers 30.
Described ip voice signaling is to be SIP (Session Initiation Protocol, Session initiation Protocol) signaling, and described TDM voice signaling can be signalling system No.7; And described ip voice signaling processing sub-module 111 can be the SIP signaling processing sub-module of treatment S IP signaling, and described TDM voice signaling processing sub 112 is for realizing the signalling system No.7 processing sub of signalling system No.7.What need to remind is, this ip voice signaling not merely comprises the SIP signaling, can also be H.323 protocol signaling, MGCP (Media GatewayControl Protocol, MGCP) signaling etc.; In like manner, described TDM signaling also not only comprises signalling system No.7.
Media conversion module 12, be used to realize of the conversion of ip voice bag to the TDM voice flow, it is after receiving the described ip voice bag of being sent by monitoring network element 20, control according to described signaling processing module 11, specifically be that the parameter of carrying in the order that issues according to signaling processing module 11 and the order is carried out the conversion of ip voice bag to the TDM voice flow, the TDM voice flow that converts is delivered to the TDM net by connecing the road, deliver to legal monitor centers 30 at last, and then realization makes legal monitor centers 30 can utilize already present mode to realize the monitoring of wider scope to the monitoring of ip voice.
Described conversion equipment 10 also can comprise signaling receiver module 13 and medium receiver module 14, wherein:
Signaling receiver module 13 is used to receive the described ip voice signaling of being sent by monitoring network element 20, and this ip voice signaling is sent to described signaling processing module 11;
Medium receiver module 14 is used to receive the described ip voice bag of being sent by monitoring network element 20, and this ip voice bag is sent to described media conversion module 12.
Further, described ip voice signaling processing sub-module 111, after being used to receive that the ip voice of being monitored network element 20 is called out beginning message, invite message for example, the resource of application media conversion resource and medium receiver module, after this resource bid success, send Indication message to described TDM voice signaling processing sub 112 and medium receiver module 14 respectively, address information with this medium receiver module 14 sends to by monitoring network element 20 simultaneously, and the address information of described medium receiver module 14 comprises IP address and port numbers etc.In addition, after the ip voice conversation is set up, the modification media conversion resource that ip voice signaling processing sub-module 111 reception quilt monitoring network elements 20 are sent and/or the resource request of medium receiver module, and judge whether to change resource, if need, then ip voice signaling processing sub-module 111 sends to the address information of new media receiver module by monitoring network element 20.
Described TDM voice signaling processing sub 112, be used for according to receiving that this Indication message generation TDM audio call that ip voice signaling processing sub-module 111 is sent begins message, and the application relay resource, by this relaying this TDM audio call is begun message and send to legal monitor centers 30.
Described monitored network element 20 and received the address information of this medium receiver module 14 that this ip voice signaling processing sub-module 111 is sent after, send the ip voice bags to this medium receiver module 12.After medium receiver module 12 is received this Indication message that this ip voice signaling processing sub-module 111 sends, this ip voice bag is sent to described media conversion module 12, described media conversion module 12 is according to the control of described signaling processing module 11, convert this ip voice bag to the TDM voice flow, and application relay resource, the TDM voice flow that generates connects the road to the TDM net, by this relaying described TDM voice flow is sent to described legal monitor centers 30 again, for example deliver to legal monitor centers 30 by the E1 interface.
Caller or Called Onhook, the ip voice end of conversation, the described network element 20 of being monitored sends ip voice release message, for example BYE message by signaling receiver module 13 to described ip voice signaling processing sub-module 111.After described ip voice signaling processing sub-module 111 is received this ip voice release message, the media conversion resource that release is applied for and the resource of medium receiver module, and send the release Indication messages for TDM voice signaling processing sub 112.Described TDM voice signaling processing sub 112 discharges Indication message according to this and generates TDM voice release message, and by existing relaying this TDM voice release message is sent to legal monitor centers 30, discharges the relay resource of being applied for then.
Signaling processing module 11 and media conversion module 12 mainly are divisions in logic among the present invention, and physically, both can be arranged at different physical equipments, also can be arranged in two different logical blocks in the same physical equipment.In addition, described can be PSTN network element, GSM network element, CDMA network element, WCDMA (Wideband Code Division Multiple Access by monitoring network element, Wideband Code Division Multiple Access (WCDMA)) network element, TD-SCDMA (Time Division-Synchronous Code DivisionMultiple Access, TD SDMA) network element and/or NGN network element etc.
Fig. 2 shows ip voice provided by the invention and converts the method flow that the TDM voice are monitored to, and it is realized by conversion equipment shown in Figure 1 10, comprises that specifically step has:
The signaling process step after receiving the described ip voice signaling of being sent by monitoring network element 20, generates the TDM voice signaling according to this ip voice signaling and sends to legal monitor centers 30, and controls a media conversion step and carry out the media conversion processing.Described signaling process step is specifically realized by the signaling processing module 11 of conversion equipment 10.
The media conversion step, receive described monitored the ip voice bag that network element 20 sends after, according to the control of described signaling process step, send to legal monitor centers 30 after converting this ip voice bag to the TDM voice flow.Described media conversion step, specifically the media conversion module 12 by conversion equipment 10 realizes.
In fact, described signaling process step and media conversion step are carried out simultaneously, but the media conversion step is carried out under the control of signaling process step.
Fig. 3 shows the preferred ip voice of the present invention and converts the method flow that the TDM voice are monitored to, and it realizes by conversion equipment shown in Figure 1 10, and the ip voice signaling in the present embodiment is the SIP signaling, and described TDM voice signaling is a signalling system No.7; And described ip voice signaling processing sub-module 111 is a SIP signaling processing sub-module 111, and described TDM voice signaling processing sub 112 is a signalling system No.7 processing sub 112, comprises that specifically step has:
Step S301 calls out beginning behind the called off-hook, monitored network element 20 and send invite message to signaling receiver module 13, and described invite message is that the calling in the SIP signaling begins message.
Step S302, signaling receiver module 13 sends to SIP signaling processing sub-module 111 with this invite message.
Step S303, SIP signaling processing sub-module 111 is handled this invite message, the resource of application media conversion resource and medium receiver module.Simultaneously, after SIP signaling processing sub-module 111 is received invite message, give the response message of being monitored 20 times 100trying of network element (provisional response) earlier.
Step S304, after the resource bid success, SIP signaling processing sub-module 11 generates and sends calling beginning message to signalling system No.7 processing sub 112 and medium receiver module 14 according to the explanation situation of this invite message.And SIP signaling processing sub-module 11 is given and is monitored 20 times 200OK response messages of network element, and the address information with medium receiver module 14 in this 200OK response message brings by monitoring network element 20, and described address information comprises IP address and port numbers etc.And, behind the called off-hook, being monitored network element sends the invite message of revising medium for for 20 times SIP signaling processing sub-module 111, SIP signaling processing sub-module 111 checks whether need to change resource, IP address and the port of having applied for, revise if desired just the IP address and the port numbers of new medium receiver module, if need not revise IP address and port numbers with regard to still original medium receiver module, take back to being monitored network element 20 by the 200OK response message, call out thereby set up ip voice.
Step S305, signalling system No.7 processing sub 112 is called out beginning message according to this, generate IAM (the Initial Address Message of signalling system No.7, initial address message) message, it is online to be responsible for that the time slot of the media conversion resource of applying for is received TDM, and the application relay resource, send IAM message for LIC 30 by this relaying.
Step S306 is after being monitored network element 20 and receiving the address information of this medium receiver module 14 that SIP signaling processing sub-module 111 is sent, to these medium receiver module 14 transmission ip voice bags.
Step S307, the calling that medium receiver module 14 is sent according to SIP signaling processing sub-module 111 begins message, and this ip voice bag is sent to media conversion module 12.
Step S308, media conversion module 12 converts this ip voice bag to the TDM voice flow according to the control of signaling processing module 11, and the application relay resource, by this relaying the TDM voice flow is sent to LIC 30.
In fact, above signaling process step and medium treatment step carry out synchronously, but medium are handled the control that need be subjected to signaling processing module 11.
Step S309 during the ip voice end of conversation, is monitored network element 20 and is sent BYE message, i.e. SIP signaling release message by signaling receiver module 13 to SIP signaling processing sub-module 111.
Step S310, after SIP signaling processing sub-module 111 is received SIP signaling release message, the media conversion resource that release is applied for and the resource of medium receiver module, and send the release Indication messages for signalling system No.7 processing sub 112.
Step S311, signalling system No.7 processing sub 112 discharges Indication message according to this and generates the signalling system No.7 release message, remove receive TDM online connect the road, and send the signalling system No.7 release messages to LIC 30 by existing relaying, discharge the relay resource of being applied for then.
In summary, the present invention receive monitored the ip voice signaling and ip voice bag that network element sends after, convert this ip voice signaling and ip voice bag to corresponding TDM voice signaling and TDM voice flow respectively after, send to legal monitor centers and realize audio monitoring.Whereby, the invention enables legal monitor centers can utilize general mechanism, monitor the speech business of being monitored network element of TDM mode and IP mode simultaneously, solved the monitoring problem of ip voice effectively, expanded the monitoring scope of legal monitor centers.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (5)
1. one kind converts ip voice the device of TDM voice to, is used for comprising at least one system of being monitored network element and legal monitor centers, it is characterized in that described device comprises:
The signaling receiver module is used to receive the described ip voice signaling of being sent by the monitoring network element, and this ip voice signaling is sent to described signaling processing module;
Signaling processing module is used for generating the TDM voice signaling according to this ip voice signaling and sending to described legal monitor centers after receiving the described ip voice signaling of being sent by the monitoring network element;
The medium receiver module is used to receive the described ip voice bag of being sent by the monitoring network element, and this ip voice bag is sent to described media conversion module;
Media conversion module, be used for receive described monitored the ip voice bag that network element sends after, carry out media conversion according to the control of described signaling processing module and handle, and send to described legal monitor centers after converting this ip voice bag to the TDM voice flow;
Described signaling processing module comprises ip voice signaling processing sub-module and TDM voice signaling processing sub:
Described ip voice signaling processing sub-module, be used for after receiving that the ip voice of being monitored network element is called out beginning message, the resource of application media conversion resource and medium receiver module, and after this resource bid success, send Indication message to described TDM voice signaling processing sub and medium receiver module respectively, the address information with this medium receiver module sends to described by the monitoring network element simultaneously;
Described TDM voice signaling processing sub is used for generating the TDM audio call according to this Indication message of receiving and begins message, and the application relay resource, by this relaying this TDM audio call is begun message and sends to described legal monitor centers;
Described monitored network element and received the address information of this medium receiver module that this ip voice signaling processing sub-module is sent after, send the ip voice bag to this medium receiver module;
Described medium receiver module is used for after receiving this Indication message that this ip voice signaling processing sub-module is sent this ip voice bag being sent to described media conversion module;
Described media conversion module is used for the control according to described signaling processing module, converts this ip voice bag to the TDM voice flow, and the application relay resource, by this relaying described TDM voice flow is sent to described legal monitor centers again;
Described ip voice signaling processing sub-module, also be used for after receiving the described ip voice release message that sends when being monitored network element at the ip voice end of conversation, the media conversion resource that release is applied for and the resource of medium receiver module, and send the release Indication message for TDM voice signaling processing sub;
Described TDM voice signaling processing sub also is used for generating TDM voice release message according to this release Indication message, and by described relaying this TDM voice release message is sent to described legal monitor centers, discharges the relay resource of being applied for then.
2. device according to claim 1 is characterized in that, described ip voice signaling is the SIP signaling, and described TDM voice signaling is a signalling system No.7; And described ip voice signaling processing sub-module is the SIP signaling processing sub-module, and described TDM voice signaling processing sub is the signalling system No.7 processing sub.
3. device according to claim 1, it is characterized in that, described ip voice signaling processing sub-module, be used for after the ip voice conversation is set up, receive described request of being monitored the resource of modification media conversion resource that network element sends and/or medium receiver module, and need to judge whether the change resource, if need, then the address information with the new media receiver module sends to by the monitoring network element.
4. device according to claim 1 is characterized in that, described is PSTN network element, GSM network element, CDMA network element, WCDMA network element, TD-SCDMA network element or NGN network element by monitoring network element.
An employing as claim 1～4 as described in each device realize the method monitored it is characterized in that described method comprises that step is as follows:
The signaling process step after receiving the described ip voice signaling of being sent by the monitoring network element, generates the TDM voice signaling according to this ip voice signaling and sends to described legal monitor centers;
The media conversion step, receive described monitored the ip voice bag that network element sends after, carry out media conversion according to the control of described signaling process step and handle, and send to described legal monitor centers after converting this ip voice bag to the TDM voice flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100556680A CN101217603B (en) | 2008-01-04 | 2008-01-04 | A device to transfer IP voice into TDM voice and corresponding snooping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100556680A CN101217603B (en) | 2008-01-04 | 2008-01-04 | A device to transfer IP voice into TDM voice and corresponding snooping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101217603A CN101217603A (en) | 2008-07-09 |
| CN101217603B true CN101217603B (en) | 2011-08-10 |
Family
ID=39623964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100556680A Active CN101217603B (en) | 2008-01-04 | 2008-01-04 | A device to transfer IP voice into TDM voice and corresponding snooping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101217603B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841864B (en) * | 2009-03-19 | 2013-03-27 | 中兴通讯股份有限公司 | Call control method and system |
| CN101557603B (en) * | 2009-05-15 | 2011-04-20 | 华为技术有限公司 | Method, device and system for lawful monitoring |
| CN102217279B (en) * | 2011-01-31 | 2013-04-24 | 华为技术有限公司 | Data processing method, communication system and data processing gateway |
| CN111432075B (en) * | 2020-03-12 | 2022-03-08 | 深圳震有科技股份有限公司 | Voice call real-time monitoring method and device based on VOIP network |
| CN115348331A (en) * | 2022-10-17 | 2022-11-15 | 国网浙江省电力有限公司宁波市北仑区供电公司 | Protocol conversion device and method for power grid communication |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040056382A (en) * | 2002-12-23 | 2004-07-01 | 엘지전자 주식회사 | IP-PABX with multi-function switching module |
| CA2464602A1 (en) * | 2003-04-28 | 2004-10-28 | At&T Corp. | Voip hybrid dlc |
| CN1553634A (en) * | 2003-05-26 | 2004-12-08 | 华为技术有限公司 | Monitoring network system and method |
| CN1567752A (en) * | 2003-06-20 | 2005-01-19 | 华为技术有限公司 | A monitoring method |
| CN1738261A (en) * | 2004-08-18 | 2006-02-22 | 华为技术有限公司 | Voice monitoring method and system |
-
2008
- 2008-01-04 CN CN2008100556680A patent/CN101217603B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040056382A (en) * | 2002-12-23 | 2004-07-01 | 엘지전자 주식회사 | IP-PABX with multi-function switching module |
| CA2464602A1 (en) * | 2003-04-28 | 2004-10-28 | At&T Corp. | Voip hybrid dlc |
| CN1553634A (en) * | 2003-05-26 | 2004-12-08 | 华为技术有限公司 | Monitoring network system and method |
| CN1567752A (en) * | 2003-06-20 | 2005-01-19 | 华为技术有限公司 | A monitoring method |
| CN1738261A (en) * | 2004-08-18 | 2006-02-22 | 华为技术有限公司 | Voice monitoring method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101217603A (en) | 2008-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100550890C (en) | Call out the system and method for routing voice through IP | |
| EP1325618B1 (en) | Method for transmission of voice over wireless packet-switched networks | |
| CN101132542B (en) | Method and device for connecting urgent call in wireless network | |
| AU2001249954A1 (en) | A technique for setting up calls in internet protocol mobile network | |
| CN100521631C (en) | System and method for generating ringbace tone | |
| CN101217603B (en) | A device to transfer IP voice into TDM voice and corresponding snooping method | |
| CN100334843C (en) | System and method for realizing packet voice network monitoring | |
| CN101141761A (en) | Monitoring method, system and device | |
| US20100086115A1 (en) | Method and apparatus for providing an audible calling party identification for a call waiting service | |
| CN101237486B (en) | Device for converting TDM media into IP media and method for using this device | |
| CN101489003B (en) | System and method for implementing voice call forwarding through data network | |
| CN101657027B (en) | Wireless faxing method, device and system | |
| CN101507133B (en) | PTT/PTS signaling in an internet protocol network | |
| CN100571306C (en) | A kind of method, system and equipment of indicating terminal device call state | |
| CN101222477B (en) | Method, equipment and system for initiator and receiver cancelling call | |
| CN101406029B (en) | System and method for monitoring video-telephone service in multimedia network | |
| CN102158613A (en) | Call transfer method and equipment | |
| CN102118705B (en) | Method and device for notifying call information | |
| WO2005112410A3 (en) | Providing voice and data service for wireless cellular subscribers operating in a wireless local area network | |
| CN101166111B (en) | A service protection method for access gateway | |
| CN101478771B (en) | System and method for voice monitoring | |
| CN100542196C (en) | The method and system that a kind of toll operator of realization inserts | |
| CN100407861C (en) | Method for implementing multimedia service calling in circuit domain | |
| JP2008141490A (en) | Emergency notification controller, radio communication terminal and base station | |
| CN101222553A (en) | Video adapting method and system based on soft queuing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |