CN101888654B - Call quality test method, device and system - Google Patents
Call quality test method, device and system Download PDFInfo
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- CN101888654B CN101888654B CN 200910136634 CN200910136634A CN101888654B CN 101888654 B CN101888654 B CN 101888654B CN 200910136634 CN200910136634 CN 200910136634 CN 200910136634 A CN200910136634 A CN 200910136634A CN 101888654 B CN101888654 B CN 101888654B
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Abstract
The invention discloses a call quality test method, a call quality test device and a call quality test system. The call quality test method comprises the following steps of: sending double-tone multiple-frequency signals to a tested terminal; testing network call quality according to the received double-tone multiple-frequency signals returned by the tested terminal to obtain a call quality test result; and comparing the pre-stored call quality fault statistical data with the call quality test result to obtain a network call fault type. The call quality test method, the call quality test device and the call quality test system remotely and automatically test the user call quality after user network complaints, avoid manually processing the complaints, reduce the period of processing client complaints, process the call faults in time, avoid repeated complaints of clients, and acquire the fault type of the current test more precisely by comparing the test result with the historical call fault data.
Description
Technical field
The present invention relates to a kind of mobile communication core network technology, relate in particular to a kind of call quality test method, Apparatus and system.
Background technology
In the prior art, the testing process that the generation user network is lodged a complaint after handling is to rely on manual the processing.Accept the circulation program with the fault ticket form, for guaranteeing to solve timeliness, conventional processing method is: client's network once inquires after complaining and namely accepting complaint, and that sends someone to complain the place carries out on-the-spot test and processing, handles to complain and pays a return visit after finishing.To remote covering, inter-provincial roaming, long complaint of processing cycle such as interconnect, there is not good solution at present.Need be sent the special messenger to pay a return visit the client's and be carried out explanation and pacify work, only strive for client's understanding support, avoid the client to repeat to complain.
The network user's single processing procedure of worker of lodging a complaint needs a large amount of repetitive operation; When the network generation unexpected incidents production large tracts of land network fault of lodging a complaint relies on the data processing network user of the artificial means worker that lodges a complaint singly to take time and effort, analysis means and analysis mode also are subjected to bigger restriction, lodge a complaint to network and handle single processing of worker and bring certain difficulty and can't handle.
The speech quality measuring technology that industry is generally used mainly is to use the distributing dial testing system, is dispersed in the place that needs test by each terminal, and the imitation user behavior carries out test calls.Utilize the mobile phone terminal module to carry out test calls, every mobile phone terminal module is connected to center service application service device by special line or GPRS radio channel, carries out uploading of test data and assigning of test assignment.Center service application service device is accepted the test result of each point, and analyzes and handle, as meets alarm conditions, then produces alarm.
At present, quality of wireless network assessment method of testing relatively more commonly used has drive test (DrivingTest, i.e. DT) and test calls (CallQualityTest, i.e. CQT).The Drive Test method is mainly adopted in the overlay area of being convenient to vehicle pass-through, to being not easy to the overlay area of vehicle pass-through, as indoor, building dense district etc., mainly adopt CQT fixed test method.
Because CQT carries out in manual testing's mode, general flow process is to formulate earlier a test plan to transfer to the tester and test to the appointed place, it is mobile phone dedicated that testing tool is generally signal testing, the data of gained all are by tester's hand-kept in this test process, come data are carried out sorting-out in statistics by them again, last manual typing record is also produced analysis report.Manual member has accounted for the overwhelming majority in whole test process, cause test data to exist very big subjectivity to lack authenticity and also in test the sampled data of per call for once make the data deficiency accuracy again.The characteristics that set up the base station in the mobile communication are that quantity is big, distribution is wide particularly in some mountain areas with a varied topography at present, wanting the scope of a large amount of base stations and its covering is carried out signal testing almost is impossible with present method of testing, to such an extent as to some places become the test blind area.
And, because DT/CQT is based on sampling, must guarantee that samples tested quantity is enough big, otherwise assessment result contingency is big especially, is easy to make the mistake of taking a part for the whole.DT stresses road, and the CQT reconnaissance stresses the big place of floating population, all can not reflect user behavior comprehensively.And to speech quality evaluation, present more algorithm and the system that has directly used external maturation, institute's phonetic material of surveying is abundant inadequately, and there is larger difference in different system unifying regional MOS test result, and its objectivity, authenticity are still waiting further checking.
In sum, the speech quality measuring technology has following defective in the prior art:
(1) manual testing's efficient is lower, and test accuracy is lower;
(2) distributing test calls power of test is limited, and is affected by environment bigger, the data upload difficulty, and content measurement is single, and can not handle the problem on the repeat circuit, can only judge this talkthrough or access failure simply;
(3) along with progressively going deep into of investigating and analysing, from the common factor in the not appearance imagination of feedback of client and network terminal two aspects, user's perception and network key performance indicators (KPI) indicate the result not to be inconsistent.
Summary of the invention
First purpose of the present invention is, at speech quality measuring technology in the prior art owing to manually complaint being handled the defective that the efficient that causes is lower and test accuracy is lower, a kind of call quality test method is provided, to reduce the customer complaint cycle, it is higher in time to handle conversation fault and test accuracy.
Second purpose of the present invention is, at speech quality measuring technology in the prior art owing to manually complaint being handled the defective that the efficient that causes is lower and test accuracy is lower, a kind of Internet phone-calling quality test device is provided, can reduce the customer complaint cycle, it is higher in time to handle conversation fault and test accuracy.
The 3rd purpose of the present invention is, at speech quality measuring technology in the prior art owing to manually complaint being handled the defective that the efficient that causes is lower and test accuracy is lower, a kind of speech quality test macro is provided, to reduce the customer complaint cycle, it is higher in time to handle conversation fault and test accuracy.
According to first purpose of the present invention, a kind of call quality test method is provided, comprise sending touch-tone signal to dut terminal; Touch-tone signal test network speech quality according to the dut terminal that receives returns obtains the speech quality test result; Compare according to the speech quality fault statistics data that prestore and described speech quality test result, obtain the Internet phone-calling fault type.
Preferably, call quality test method of the present invention also comprises: described Internet phone-calling fault type is judged; When described Internet phone-calling fault type is the simple fault type, described Internet phone-calling fault type is sent to described dut terminal.
Preferably, call quality test method of the present invention also comprises: described Internet phone-calling fault type is judged; When described Internet phone-calling fault type is the complex fault type, extract position and the relevant base station information at described dut terminal place, and the number of a plurality of networked users' phones in the same base station cell of section at the same time in the described dut terminal region; Described a plurality of networked users are carried out the interactive voice test, according to the test of common conversation fault design, determine the voice call fault type that described networked users occur.
More preferably, call quality test method of the present invention also comprises: extraction need be carried out the dut terminal number of call voice test, according to default testing poll rule described dut terminal is made a call, the lang sound speaking test of going forward side by side obtains the voice call test result; Obtain the voice call fault type according to the speech quality fault statistics data that prestore and described voice call test result.
According to second purpose of the present invention, a kind of Internet phone-calling quality test device is provided, comprising: data acquisition module is used for receiving the touch-tone signal that dut terminal returns; The administrative analysis module is used for the touch-tone signal that receives is analyzed, with the test call quality.
According to the 3rd purpose of the present invention, a kind of speech quality test macro is provided, comprise: Internet phone-calling quality test device, for the touch-tone signal test network speech quality of returning according to the dut terminal that receives, judge the Internet phone-calling fault type of testing according to the speech quality fault statistics data that prestore in the Core server, and described Internet phone-calling fault type is sent to described dut terminal; Core server is used for storage speech quality fault statistics data.
The call quality test method of first embodiment of the invention, Apparatus and system, remote auto ground, back is tested the user's communication quality by lodging a complaint at user network, avoid the manually processing to complaining, reduced the cycle of handling customer complaint, in time handle the conversation fault, avoid the client to repeat to complain.And, compare by result and historical conversation fault data that test is obtained, draw the fault type of this test more accurately.
The call quality test method of second embodiment of the invention, Apparatus and system, by complexity conversation fault is carried out the voice call test, change accident analysis and judged the situation of being operated by past manual, and in each test, speech quality fault type statistics and CQT/TD voice call data are stored, feasible test for speech quality has abundanter phonetic material, samples tested quantity is enough big, can reflect user behavior more comprehensively, the result of speech quality test also test result is true, reliable, can accurately imitate client's perception.
In addition, owing to adopt centralized DT/CQT, can test a plurality of user terminals simultaneously, test result can not be subjected to the influence of environment, and can test multiple business, can handle the repeat circuit problem simultaneously, and speech quality is monitored.
Owing at network terminal speech quality is tested, makes user's perception conform to network key performance indicators (KPI) indication result.Simultaneously, by different terminal types and mobile data services are carried out speaking test, be conducive to improve user's perceptibility and quality of service.
Description of drawings
Fig. 1 is the structure chart of the present invention's first and second embodiment speech quality test macros;
Fig. 2 is the structure chart of first embodiment of the invention Internet phone-calling quality test device;
Fig. 3 is first embodiment of the invention call quality test method flow chart;
Fig. 4 is second embodiment of the invention call quality test method flow chart;
Fig. 5 is third embodiment of the invention call quality test method flow chart.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
As shown in Figure 1, in the first embodiment of the invention, the speech quality test macro comprises:
Internet phone-calling quality test device 204, for the touch-tone signal test call quality of returning according to the dut terminal 206 that receives, judge the Internet phone-calling fault type of testing according to the speech quality fault statistics data that prestore in the Core server 202, and the Internet phone-calling fault type is sent to dut terminal 206;
As shown in Figure 2, Internet phone-calling quality test device 204 specifically comprises:
Wherein, administrative analysis module 2044 comprises: judge submodule, judge the Internet phone-calling fault type of test according to the speech quality fault statistics data that prestore in the Core server; Extract submodule, be used for when described Internet phone-calling fault type is the complex fault type, extract position and the relevant base station information at described dut terminal place, and the number of a plurality of networked users' phones in the same base station cell of section at the same time in the described dut terminal region.
Preferably, Internet phone-calling quality test device 204 also comprises tone testing module 2046, is used for carrying out dut terminal call voice measure of merit.The sound effect test comprises: the unobstructed situation of described dut terminal, up, downlink voice credit rating, the information of the field intensity of signal and residential quarter, base station.
More preferably, Internet phone-calling quality test device 204 also comprises sound card module 2048, in communication process, can select the suitable suggestion voice of replying according to the purpose of test, the type of partner, the signal of reception, instruct the other side of conversation to cooperate, and initiated the calling of specifying test point or send instruction to allow and specify test point calling system central monitoring unit number by user's sensory perceptual system, set up the voice of conversation back test point played pre-recorded, central monitoring unit connects audio amplifier or earphone is experienced the actual call tone quality effect of judgement by the tester.
Among first embodiment, Internet phone-calling quality test device 204 can be independent network element, or is arranged in the network switch.
As shown in Figure 3, the first embodiment of the invention call quality test method comprises:
Preferably, this call quality test method also comprises: step 306, dut terminal is carried out the call voice test.
First embodiment of the invention is tested the user's communication quality by the remote auto ground, back of lodging a complaint at user network, avoids the manually processing to complaining, and has reduced the cycle of handling customer complaint, in time handles the conversation fault, avoids the client to repeat to complain.And, compare by result and historical conversation fault data that test is obtained, draw the fault type of this test more accurately.
Simultaneously, owing to adopt the tone testing module at client speech quality to be tested, make user's perception conform to network key performance indicators (KPI) indication result.Simultaneously, different terminal types and mobile data services are carried out speaking test, be conducive to improve user's perceptibility and quality of service.
As shown in Figure 1, second embodiment of the invention speech quality test macro also comprises tone testing server 208,
Internet phone-calling quality test device 204, be used for extracting to mobile network switch, VLR Visitor Location Register, attaching position register, base station controller position and the relevant base station information at user mobile phone place, extract in the user region of lodging a complaint at the same time a plurality of networked users' telephone numbers in the same base station cell of section;
In the second embodiment of the invention, tone testing server 208 provides an interactive test environment for the user, can guide the user to pass through some and be a series of tests of common conversation fault design, the problem that diagnosis occurs, as calling number, echo, noise, voice quality, etc.In case carried out the voice quality test, the user can obtain a verbal report when EOT, retrieves detailed test result from back-end client's back-up system when opening.If find that voice service has problem, the user can be transferred to the customer support manual position automatically and solve problem.
The background manage software of tone testing server 208 adopts the display mode of Windows user interface, electronic chart and tree type block diagram, by information such as Internet phone-calling quality test device calling and obtaining user (MSC), VLR Visitor Location Register (VLR), attaching position register (HLR), BSC base station cells, position and the current state that shows each user mobile phone point directly perceived, information and the signal monitoring data that can check each website easily.Tone testing server 208 flexible combination several data querying conditions make things convenient for the user to inquire about, and every class data, each time period data all can represent with curve form.
More preferably, also comprise CQT voice call testing equipment 212, have the function of carrying out auto-dial testing and voice quality being carried out objective evaluation.By information such as Internet phone-calling quality test device 204 calling and obtaining user (MSC), VLR Visitor Location Register (VLR), attaching position register (HLR), BSC base station cells, extract each and need carry out call voice test subscriber phone number, risen by central control unit according to the testing poll rule of system's setting by the tone testing server and to exhale, mainly contain the CQT poll test of being initiated by user's sensory perceptual system to all testing type test points, can test judging whether to exist single-pass phenomenon and perception call quality problem.The test of CQT voice call testing equipment 212 is automatic bidirectional CQT test.
CQT voice call testing equipment 212 can also be initiated the calling of specifying test point or send instruction to allow and specify test point calling system central monitoring unit number by user's sensory perceptual system, set up the voice of conversation back test point played pre-recorded, central monitoring unit connects audio amplifier or earphone is experienced caller/incoming call acoustical quality test of judging actual call tone quality effect by the tester.
As shown in Figure 4, the second embodiment of the invention call quality test method specifically comprises step:
Step 504a after Internet phone-calling quality test device 204 and dut terminal connect, sends one section specific touch-tone signal;
Step 504b after dut terminal is received signal, transmits, and beams back Internet phone-calling quality test device 204 again;
Step 504c, the signal that prestores in the touch-tone signal that Internet phone-calling quality test device 204 returns dut terminal and the Core server 202 is compared, obtain the Internet phone-calling fault type of this test, and record this test report data such as access success number of times, the frequency of failure, call completing rate, average turn-on time;
Step 510a, Internet phone-calling quality test device 204 extracts position and the relevant base station information of complaining user 206 places to mobile network switch, VLR Visitor Location Register, attaching position register, base station controller, extracts in the user region of lodging a complaint at the same time a plurality of networked users' telephone numbers in the same base station cell of section;
Step 510b, the 208 couples of a plurality of cellphone subscribers of the described user of lodging a complaint 206 in interior same place of tone testing server carry out the interactive voice test, by a series of tests of some common conversation fault designs, the voice call fault type that diagnosis occurs;
Step 510c, when tone testing server 208 starts, CQT/DT voice call testing equipment 212 makes a call according to default testing poll rule dut terminal, mainly contains the CQT/DT poll test of being initiated by user's awareness apparatus to all testing type test points. and test be can finish and single-pass phenomenon and perception call quality problem judged whether to exist; Or initiated the calling of specifying test point or send instruction to allow and specify test point to call out CQT/DT voice call testing equipment 212 by user's awareness apparatus, set up the voice of conversation back test point played pre-recorded, caller/incoming call that actual call tone quality effect is judged in impression carries out the detection of speech quality.Testing result comprises, unobstructed situation (unobstructed or single-pass), and up, downlink voice credit rating (5 grades of the bests, 3 grades are normal, 1 grade is the poorest) and acoustical quality are tested.The value of test result and the data in the CQT/DT voice call database are compared, and analysis and judgement draws grade and the failure cause of actual speech quality, is sent to tone testing server 208;
Second embodiment of the invention, by tone testing server and CQT/TD voice call testing equipment complexity conversation fault is detected, change accident analysis and judged the situation of being operated by past manual, and in each test, speech quality fault type statistics and CQT/TD voice call data are stored, feasible test for speech quality has abundanter phonetic material, samples tested quantity is enough big, can reflect user behavior more comprehensively, the result of speech quality test also test result is true, reliable, can accurately imitate client's perception.
In addition, owing to adopt centralized DT/CQT, can test a plurality of user terminals simultaneously, test result can not be subjected to the influence of environment, and can test multiple business, can handle the repeat circuit problem simultaneously, and speech quality is monitored.
Because adopting Internet phone-calling quality test device 204 tests speech quality at network terminal, tone testing server 208 and CQT/TD voice call testing equipment 212 are tested speech quality at client, make user's perception and network key performance indicators (KPI) indication result conform to.Simultaneously, different terminal types and mobile data services are carried out speaking test, be conducive to improve user's perceptibility and quality of service.
As shown in Figure 5, the present invention's the 3rd enforcement call quality test method comprises:
The be correlated with speech quality test of step 614, CQT/DT voice call testing equipment 212;
Step 616 is compared the value of test result and the data in the CQT/DT voice call database, and analysis and judgement draws grade and the failure cause of actual speech quality.
Up in the tested user's of majority testing result, downlink voice quality, information such as the field intensity of signal are undesired, send the special messenger to in-situ processing, if having only indivedual tested users' testing result undesired, can automatically the user be forwarded to user management platform seat and solve problem.
In addition, if the situation that continuous several times is not normally connected takes place, illustrate that the fault of immediate intervention needing to have appearred in path BSC or BTS, this characteristic can be used for the real-time monitoring of wireless access network significant trouble.If when finding single-pass or cross-talk scenario are arranged, illustrate that the TRX of wireless side may go wrong, this characteristic can be used for confirming customer complaint, the user's that distinguishes one from the other terminal problem or radio network problems, the workload of minimizing attendant fixed test.
In the third embodiment of the invention, follow the tracks of by 204 pairs of speech qualities of Internet phone-calling quality test device, automatically speech quality is tested, do not need customer complaint, can solve the conversation fault more in time like this, improve user's susceptibility.
It should be noted that: above embodiment is only unrestricted in order to the present invention to be described, the present invention also is not limited in above-mentioned giving an example, and all do not break away from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (15)
1. a call quality test method is characterized in that, comprising:
Send touch-tone signal to dut terminal;
Touch-tone signal test network speech quality according to the dut terminal that receives returns obtains the speech quality test result;
Compare according to the speech quality fault statistics data that prestore and described speech quality test result, obtain the Internet phone-calling fault type;
Described Internet phone-calling fault type is judged;
When described Internet phone-calling fault type is the complex fault type, extract position and the relevant base station information at described dut terminal place, and the number of a plurality of networked users' phones in the same base station cell of section at the same time in the described dut terminal region;
Described a plurality of networked users are carried out the interactive voice test, according to the test of common conversation fault design, determine the voice call fault type that described networked users occur.
2. call quality test method according to claim 1 is characterized in that, described transmission touch-tone signal to the operation of dut terminal specifically comprises:
Receive the fault complaint that user terminal sends, complain according to described fault to send touch-tone signal to described dut terminal.
3. call quality test method according to claim 1 is characterized in that, described transmission touch-tone signal also comprised to the operation of dut terminal:
Network running quality is carried out from motion tracking the dut terminal that obtains breaking down and fault type.
4. according to any described call quality test method in the claim 1 to 3, it is characterized in that, also comprise:
Described Internet phone-calling fault type is judged;
When described Internet phone-calling fault type is the simple fault type, described Internet phone-calling fault type is sent to described dut terminal.
5. call quality test method according to claim 1 is characterized in that, also comprises:
Extraction need be carried out the described dut terminal number of voice call test, according to default testing poll rule described dut terminal is made a call, and the lang sound speaking test of going forward side by side obtains the voice call test result;
Obtain described voice call fault type according to the speech quality fault statistics data that prestore and described voice call test result.
6. an Internet phone-calling quality test device is characterized in that, comprising:
Data acquisition module is used for receiving the touch-tone signal that dut terminal returns;
The administrative analysis module is used for the touch-tone signal that receives is analyzed, with the test call quality; Described administrative analysis module comprises:
Judge submodule, judge the Internet phone-calling fault type of test according to the speech quality fault statistics data that prestore in the Core server;
Extract submodule, be used for when described Internet phone-calling fault type is the complex fault type, extract position and the relevant base station information at described dut terminal place, and the number of a plurality of networked users' phones in the same base station cell of section at the same time in the described dut terminal region.
7. Internet phone-calling quality test device according to claim 6 is characterized in that, also comprises: the tracking and testing module is used for network running quality being carried out from motion tracking the dut terminal that obtains breaking down and fault type.
8. Internet phone-calling quality test device according to claim 7 is characterized in that, also comprises: the tone testing module is used for carrying out dut terminal call voice measure of merit.
9. Internet phone-calling quality test device according to claim 8 is characterized in that, described sound effect test comprises: the unobstructed situation of described dut terminal, up, downlink voice credit rating, the information of the field intensity of signal and residential quarter, base station.
10. Internet phone-calling quality test device according to claim 8, it is characterized in that, also comprise: the sound card module is used at communication process, select the suitable suggestion voice of replying according to the purpose of test, the type of partner, the signal of reception, instruct partner to cooperate.
11. a speech quality test macro is characterized in that, comprising:
Internet phone-calling quality test device, the touch-tone signal test network speech quality for returning according to the dut terminal that receives obtains the speech quality test result; Compare according to speech quality fault statistics data and described speech quality test result that Core server prestores, obtain the Internet phone-calling fault type; And described Internet phone-calling fault type is sent to described dut terminal; Described Internet phone-calling fault type is judged; When described Internet phone-calling fault type is the complex fault type, extract position and the relevant base station information at described dut terminal place, and the number of a plurality of networked users' phones in the same base station cell of section at the same time in the described dut terminal region;
The tone testing server is used for described a plurality of networked users are carried out the interactive voice test, according to the test of common conversation fault design, determines the voice call fault type that described networked users occur;
Core server is used for storage speech quality fault statistics data.
12. speech quality test macro according to claim 11 is characterized in that, also comprises:
CQT voice call testing equipment, be used in described tone testing startup of server, extraction need be carried out the described dut terminal number of voice call test, according to default testing poll rule described dut terminal is made a call, the lang sound speaking test of going forward side by side obtains the voice call test result;
Described tone testing server obtains described voice call fault type according to the speech quality fault statistics data that prestore and described voice call test result.
13. speech quality test macro according to claim 12 is characterized in that, described Core server comprises: dynamic data base is used for each Internet phone-calling quality fault and the voice call quality fault of testing of storage.
14. speech quality test macro according to claim 12 is characterized in that, described tone testing server comprises:
Interactive test module is used for described a plurality of networked users are carried out the interactive voice test, according to the test of common conversation fault design, determines the described voice call fault type that occurs;
Analysis module obtains described voice call fault type according to the speech quality fault statistics data that prestore and described voice call test result.
15. according to any described speech quality test macro in the claim 11 to 14, it is characterized in that described Internet phone-calling quality test device is independent network element, or is arranged in the network switch.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102612062A (en) * | 2011-01-20 | 2012-07-25 | 飞思达技术（北京）有限公司 | Method for testing and analyzing unipath of soft switch system |
| CN102625328A (en) * | 2011-01-28 | 2012-08-01 | 中兴通讯股份有限公司 | Method, terminal, server, system for voice quality remote evaluation |
| WO2013091235A1 (en) * | 2011-12-23 | 2013-06-27 | 华为技术有限公司 | Conversation fault locating method and system |
| CN104064198B (en) * | 2013-03-20 | 2017-03-22 | 中国移动通信集团河南有限公司 | Voice quality assessment method and device |
| CN103974299A (en) * | 2014-05-15 | 2014-08-06 | 华为技术有限公司 | Network optimizing method and device |
| CN107785031B (en) * | 2017-10-18 | 2021-01-22 | 京信通信系统（中国）有限公司 | Method and base station for testing voice damage of wired network side in wireless communication |
| CN109788501B (en) * | 2017-11-10 | 2020-08-18 | 中国移动通信集团公司 | 2G +4G mobile network voice quality joint evaluation method and device |
| CN108494976A (en) * | 2018-03-26 | 2018-09-04 | 安徽德特信息技术有限公司 | Call drop failure auto-alarm-signal keying device uploading system based on signalling analysis and its method |
| CN110493810B (en) * | 2018-05-15 | 2022-06-14 | 中国移动通信集团湖北有限公司 | Method, device, equipment and medium for detecting recording notification fault |
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| CN1992650A (en) * | 2005-12-30 | 2007-07-04 | 中兴通讯股份有限公司 | Method for detecting calling continuity of IP packet carrying network |
| CN101035159A (en) * | 2007-02-12 | 2007-09-12 | 中国移动通信集团浙江有限公司 | Dialed monitoring system for the troubleshooting of the communication network and its monitoring method |
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| CN1992650A (en) * | 2005-12-30 | 2007-07-04 | 中兴通讯股份有限公司 | Method for detecting calling continuity of IP packet carrying network |
| CN101035159A (en) * | 2007-02-12 | 2007-09-12 | 中国移动通信集团浙江有限公司 | Dialed monitoring system for the troubleshooting of the communication network and its monitoring method |
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