Subscribe to RSSDomestic and foreign operation business moves IP development present situation
Along with the mobile communication network and the Internet fusion development, 3G network time which soon arrived, the motion grouping service was occupying the main position, this gave the IP address the allocation to bring the new challenge. Moves unceasingly along with the user, user’s IP address needs to redistribute, causes the user to be unable the service which implements in the motion process does not interrupt, this stimulated moved the IP technology the rapid development. Moves IP is in the mobility management mm technology one kind. Its main function implements the cross webpage seamless switch, mainly uses in under the motion condition carrying on the uninterrupted communication or the information access. At present moves IP mainly to use in CDMA2000, carries on the mobility management mm, but in GPRS, WCDMA and TD-SCDMA mainly uses the GTP protocol.
At present, global each big operation business to moved the IP technology the research and the application already makes certain progress, the author interviewed the expert who field several bits moved IP, moved IP to the domestic and foreign operation business the research situation to make some understandings.
Domestic operation business research condition
As for our country domestic operation business that, at present mainly was China moves with the China Unicom two big migration operation business to moves IP to do some research. According to the Chinese Migration Research institute IP Communication Research institute eldest grandson few mausoleums introduces that, at present our country has not moved IP the large-scale commercial deployment. The association passes the CDMA 20001X network to support at present moves IP, but reporter understood from the China Unicom correlation technical personnel, China Unicom in 2004 carried on in the C network moved IP the experimental study, but has not carried on the network deployment. Merely also is at the phase which the experiment just finished, therefore, this function has not begun using. China Unicom estimated after IMS network comprehensive deployment only then can introduce moves the IP technology. As for the place operation business, has also not carried on the correlation according to the understanding the deployment.
According to Sun Shaoling introduces that, at present is merely domestic operation business, the development facility, in the colleges and universities some experimental network has some to move IP the deployment, for instance China moves in the CNGI network had deployed moves IP to conduct some research and the experiment. This kind of condition primary cause is:
(1) moves IP the demand is not extremely urgent. At present moves the IP implementation data service the mobility, but in voice, video frequency and so on grade of service sensitive service comprehensive deployment in front of grouping domain, moves IP extremely urgently the demand not.
(2) moves the IP implementation mobilized effect to wait for the enhancement. China moves in moves IP in the research to detect that, at present moves IP only to be able to implement the second level switch, satisfies service the like this with difficulty and so on voice demands.
Overseas operation business research condition
In under the wireless technical impetus, IETF started in on century 90’s to move the IP technology to carry on studies and has formulated the related technology standard: In 1996 completed the Mobile IPV4 RFC2002’s formulation, in 2004 completes the Mobile IPV6 RFC3775’s formulation, and unceasingly carried on the modification and the consummation in the following time according to technical and the application scene demand to these two protocol race. According to China for moves the IP expert to introduce that, at present, IETF and so on international standard organization still at organization warm discussion, therefore, moves the IP standard the consummation also to need period of time. The present motion IP technology still was at the experimental stage, not yet carries on the large-scale deployment. European and American operation business like TI, Vodafone, BT, Telefonica, Sprint and so on, are moving the IP technology the research aspect comparison attention, quite is also high to the standard organization’s participation enthusiasm.
At present moves IP the deployment to look that, resurgence communication migration core network grouping product project Manager Liu Xiliang introduces to reporter, North America’s motion IP deployment quite many. This is because the North America operation business wireless data network mostly uses the CDMA 1X technology, at development wireless data service time needs to move the IP technology through the deployment to support the user migration data service. Quite is weak in the European operation business support situation, because at present mostly uses in the GPRS network or the WCDMA network interior is the GTP protocol support mobility, only then was considering the GPRS network and the WCDMA network and the heterogenous network exchange, only then uses moves the IP technology.
Moves the IP technology regarding at present widely to deploy by no means in the whole world that, Liu Xiliang summarized three aspect reasons: First, moves the IP technology at present to have the problem which in some actual deployment needs to urgently await to be solved. Although moved the IP technology to raise from on century 90’s, but is limited equally with IPv6 with the demand and the technical reason not valid use, this caused to move the IP technology the question which needed to solve in the actual deployment, always did not have the effective addressing. At present moves the IP existence to affect its deployment the question to include: Moves IP the triangle route question, switches the question fast and moves IP regarding the Qos safeguard question and so on.
Next is may substitute technical the existence. At present in 3GPP, regarding the wireless data service mobility support is GPRS Tunnel Protocol which through operation business and so on the Ericsson raises (G9 7 3 1 2 4 8:
VoIP: The speech superintendent should know any _ makes the toll free number in 0av.info
A VoIP superintendent needs to know the quite specific matter mainly is the video frequency regarding the QoS influence as well as the VoIP latent integration.
Looks like the IP network speech (Voice the over IP,VoIP) to be same, from the network economy prosperous start, the IP network video frequency on both popular and has filled the challenging. We have already experienced time the too many purchase cheat phenomenon, now the majority clients already became suave, when the buyer and did the IT department and how use the video frequency system regarding theirs user the question also to become the reality. In this article, how do we mainly speak the speech superintendent or the network superintendent should face this question to make the decision-making.
VoIP classification
Here is to a IP network video frequency simple classified description.
Flows media (Streaming): It is used mainly for to take the single-channel video frequency content distribution, for instance CEO to staff broadcast, secure warning video frequency, many kinds of trainings and so on. A quite popular stream transmission deployment characteristic is may store the video frequency content in the network edge, the user may “according to need” the access. This is from broadcasts one kind of video frequency which in the technology obtains benefits.
Video frequency conference (Conferencing): Regardless of is two people, two rooms are six rooms, this is a IP network video frequency “the head which discusses” variety. But the very many old video frequency conference system jumped over the IP part to run the video frequency on ISDN.
Network really (Telepresence): This is a relative new thing. It attempts by the high definition video frequency, may at will the reproduce by pantograph picture, the sense of space sound and other identities provides a more real user experience. Said in the theory that, it allows the user to be able to use all body language and written or the non-written mailing address, these all are the traditional video frequency conference cannot achieve.
Now, should say should know matter…
Terminal: This is you uses for to look at the video frequency the device. Least they need to include a video frequency photographic camera and some kind of TV device. You might select “in the room the system” this kind to include the one whole set large-scale to be possible to reappear the entire conference room special purpose equipment, either had the video frequency player and the network camera notebook or table model computer, either was situated between the intermediate some devices.
Here main resolution lies in uses the least expenses to establish the sharing system which a conference room uses and “the desktop video frequency” convenience and identity expenses contrast. If your hoped runs the video frequency on the desktop, must confirm you have already installed the local area network, also must prepare processing many kinds of users the demand support, for instance they attempt simultaneously runs when 30 programs complained the pitiful frame speed, as well as works as they when motion work.
Transmission: How is this you delivers the video frequency from a terminal other mode. Assuming you use IP, you may select use in your unit data WAN or establish a special-purpose video frequency network. ISDN also is a zone which a selection - - or acts according to you to be at, also is possibly a good method.
Expands the gateway: How not only is this you links the video frequency system in your company’s network the method. First, you need to resolve whether this is a demand. In other words, has is not in your unit’s people has the use video frequency conference need. If has, you may select on the Internet or ISDN establish your gateway, or purchases a gateway service from the WAN provider or other service provider there.
Integration: How does this is link yours video frequency system other IT system the method. Including links your video frequency system compared with the popular selection to in yours email and the calendar program, such user may arrange the conference and the conference room, or links it the immediate communications system and on other data cooperation system, causes it to be easier to use, the permission user uses a PC program share picture or works together.
A VoIP superintendent also needs to know the quite specific matter mainly is the video frequency regarding the QoS influence as well as the VoIP latent integration. First, the QoS video frequency stream needs to grade and in view of the data stream safeguarding, you should reserve how many bandwidths to guarantee the queue the size appropriate is a quite difficult question. In you deployed before need confirmed your call management check is running. Next, if you simultaneously have VoIP and the video frequency conference system, this is some your user wants to use the video frequency telephone and wants to let only have the speech traffic capacity user to join to a video frequency conference good opportunity, such speech user has used the VoIP system in yours network.
About author:
Tom Lancaster, CCIE# 8829 CNX# 1105, has 15 year work experience consultation teacher in the network industrial world. He also is many this network books author, recent one is Sybex publication CCSP: Secure PIX and Secure VPN Study Guide.
The VoIP network appraised skill _ makes the toll free number in 0av.info
Question: Our company prepares to use the VoIP implementation, the constructor comes to the network to carry on the appraisal, including lays aside one in the network exit to use SNMP to collect some switchboard data specially the installment. They from the collection data detected here has the delay question, our IT staff and they have the different conclusion, said the SNMP transmission is lower than the IP transmission priority, even compared to VoIP also low. Which is accurate? How should make the network appraisal the conclusion?
Expert explanation:
Usually cannot through SNMP determine the link delays, back and forth time in some MIB by record, but is must calculate in very many situations. The priority and the empties also possibly add the delay time, delays already may delay through SNMP also may delay through Ping carries on the measure. But in certain situations, the SNMP delay digit refers is simply not delays to the next polling time. Simply speaking, you must know these value actual representative’s significance.
In Ping time, when these wrap in certain networks is not carries on the transmission by the low priority, you obtain the better round-trip time, but these all concern with the network. Now, in other words, if the specific link needs to spend more time compared to other links, you may determine that kind linked slowly some. If transmits far then the speed is slower. Not the good electric cable eliminates the need more DSP time or the reduced disturbance.
The best appraisal mode all has the wrong port line cable including the SNMP data and the test. This will let you know you will be supposed to improve the electric cable (possibly to cause question) the hardware. You may create VLAN for yours speech device to obtain on your device certain questions.
The appraisal also should determine you have the same system version on all core device, as well as the buffer has not changed full. You also should examine on the switchboard the mode of transmission, confirmed you place the telephone pressure smallest above. This process avoids you buying more devices (to want to inspect your electric cable same).
Simply speaking, your network should run normally, has the available bandwidth and the good work sequence electric cable device. (Chen Yue peak compile)
The global virtual VoIP operation business foreground analysis reported _ makes the toll free number in 0av.info
Although the present whole world had the number surely telephone subscriber already to regard as VoIP their first choice the voice communication facility, but speaking of the virtual VoIP network operation business, the market competition pressure adds day by day, but they are struggling diligently for the hold existing market share. Virtual VoIP network operation business (VVC) is also called based on the host computer VoIP provider (Hosted VoIP Provider) or the independent VoIP service provider, they faced with were coming from on the other day traditional telephone operation business, mobile communication operation business and the wired service provider and so on the various challenge, because of these operation business already their tradition voice system to IP network transition. Therefore, virtual VoIP network operation business diligently is creating the new business model at present, and attracts more new users.
In such situation, global VVC pioneer Vonage Corporation has faced many challenges on the other day. For example, this March federation court determined it to encroach upon the Verizon Communications patent, because they provided the voice link service from the Internet to the ordinary telephone. At the same time, Vonage Corporation also faces Sprint Nextel Corporation and other telephone company telco’s patent aspect lawsuit. In such situation, Vonage is facing the potential user to lose, the staff drains, the economic problem is even the bankrupt threat. During, Vonage CEO already resigned, the company was facing the unprecedented crisis.
Vonage they not good achievement sums up in order to in the VVO industry chain the weakest link, is the load bearing network. VVO does not have oneself special load bearing network in fact, usually is needs to draw support from other operation business to come user’s call route to the public telephone network (PSTN) on. ABI Research chief wide band analyst Michael Arden pointed out that, the VVO biggest difficult problem is they does not have own network, therefore they have no way to the load bearing to provide the service the network to carry on the check.
In the global scope the VoIP service rapid development has indicated the market latent space. ABI estimated global the VoIP user number 38,000,000 will grow from 2006 to 2012 267,000,000. In the Asian and Pacific area, the user number hoped from last year 14,880,000 to grow to 2012 92,250,000. In Asia, based on the PC VoIP user estimated can 1,740,000 grow from 2006 to 2012 11,800,000. However, to 2012, the Asian zone from 10,800,000 will grow based on DSL/ optical fiber VoIP user to 65,000,000, from 2,350,000 will grow based on the cable TV network VoIP user to 11,450,000. ABI also forecast that, the North America zone also has the same aspect, 23,000,000 will grow based on the PC VoIP user from 2006 to 2012 15,900,000, similar lag in based on DSL/ optical fiber and cable TV network VoIP market.
At the same time, speaking of the virtual VoIP network operation business, the VoIP market also has some urgent questions to need to solve. In the American such market, virtual VoIP network operation business already saw the market rate of increment possibly can bog down, if specially holding of law tradition operation business interferes these services.
Arden indicated, if traditional operation business obtains the law to permit hinders the virtual VoIP network operation business deployment service in theirs load bearing network, then the virtual VoIP network operation business foreground very will be dreary. In Europe, the traditional telecommunication operation business like England telecommunication is erecting their IP network, and migrates the voice feature to the new IP network in. All these have brought the condemnation challenge and the crisis for the virtual VoIP network operation business.
Chinese market present situation
In China, benefits in the national territory recovers broadly, the virtual VoIP network operation business market foreground favors, because they will save the soaring long-distance telephone call expense for the user.
China’s analysts declared that, China’s VVC user number will achieve at the end of this year 1,230,000, but to 2011 longed for will grow to 13,000,000. The analyst believed that, lies in regarding the Chinese client strongest attraction through VVC may save the massive long-distance telephone call expense expenses, therefore will obtain the success in the future virtual VoIP network operation business.
The analyst further pointed out that, VoIP already had the probably 9 years history in China, the present license plate was provides for 6 big traditional telecommunication operation business, carries on based on the special network IP card telephone service. These telecommunication operation business including the Chinese telecommunication, China Unicom, China Netcom, China moves with the Chinese iron passes. At the same time, each big operation business also started the wide band IP telephone experimental network to deploy that, in the nationwide scale VoIP user 50,000 grew from 2004 to 2006 year’s end 720,000.
Although traditional operation business already made first move and got control in the Chinese VoIP market, but speaking of the virtual VoIP network operation business, the price superiority will enable them to favor in the future market competition, although at present also has some limitations in the Chinese virtual VoIP network operation business, for instance their user usually only could carry on PC to the telephone call single item, but will come from the traditional PSTN network call not to be able by the route to the corresponding soft telephone terminal in.
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The Hong Kong telephone special line has any difference _ with the common SKYPE communication to make the toll free number in 0av.info
· the telephone special line has the ordinary Hong Kong solid speech majority of functions, has the Hong Kong solid number clear bidirectional to hit mutually interlocks, comes the electricity display, the call forwarding and the facsimile and so on, may substitute for the ordinary telephone, but SKYPE contacts the ordinary telephone only to be able to split out unidirectionally, is only the ordinary telephone supplement;
The small business must have five kind of high-level VoIP function _ makes the toll free number in 0av.info
The small business also may use some high-level VoIP function through a special method, causes your small business the scale to be bigger in the user eye. The author for you introduced the enterprise must have five kind of high-level VoIP functions.
You already knew when meets the enterprise telephone need, if uses VoIP the technical substitution tradition PSTN telephone line, if or uses together, can brings the enormous advantage in the cost control and the conveniences aspect. Once but you resolved uses the VoIP technology, you also need to carry on other some decisions-making.
When selects the VoIP supplier, PBX as well as/or the IP telephone system, you need to consider you need performance. If your enterprise scales are not big, your complete demand is possibly some basic functions, like the telephone switches over, speech mailbox, tripartite telephone conversation and so on.
Actually, the small business also may use some high-level functions through some special methods. In fact, the better function setting can cause your small business at the client (is specially latent client), the partner, the supplier as well as other some carries on business through the telephone in the human eye to look like looks like a big enterprise.
Let us have a look any type the function to be able to cause the small business to look like the scale to be bigger, more specialized. The following is I thinks the most important 5 functions.
Automated operator
This is the speech mail one kind of expansion function, the automated operator is carries the IP telephone system and IP high the PBX device most basic function. For example, opens in source IP PBX in commonly used Asterisk the automated operator function to be possible to broadcast music in the telephone subscriber standby period or to record the good information in advance, what it uses is the speech mail “the tree” the function, can support the department directory, the staff directory, or extension telephone and so on.
Moreover, the automated operator software can respond hits for the central number telephone, and defers to human’s requirement which enters the telephone to switch over the telephone. For example, enters the telephone the human can select the telephone forwards to the sales outlet, the cost department, account receivable department and so on. In a wife and children molding machine construction, a person or a department possibly simultaneously have completely these functions, the different selection possibly all forwards to the identical extension telephone, but enters the telephone the human did not know this situation, like this your enterprise on probably wants big somewhat compared to the actual scale.
Found me, with me
Moreover one kind of function found me, with me (Find Me, Follow Me, FMFM). This function permits the staff in the organization interior or exterior migration, but still can through receive the telephone in the desktop setting which hits. In the home long-distance work staff, travels on official business in the hotel room, works the technical personnel outside the laboratory, regardless of where their body in all can receive projects on the company the telephone.
You may carry on the configuration to the system, when has the telephone enters, the desktop telephone first the bell, afterwards staff’s handset bell, again then is staff’s household telephone. bell, found the staff until the system. The place which or the staff also may use which the function setting system completely will be typing the telephone shouts “with me” changes to him to be at.
Through this function, the staff had a higher flexibility, can reduce the client and the speech mailbox dialogue probability, enhances opportunity which the client and the staff exchange directly. The different factory provides the FMFM function name possibly differs from, like the call searches or shouts high-level transfers and so on.
Attendance function
This is the FMFM one kind of expansion function. The attendance function is not a position which the passive need user sets them to be going to exist, but is the actual tracing user’s whereabouts. For example, the system could examine the user to use the computer in the cost department to register the email address, or examined in the front end reception area the speech mailbox, then the system could infer the position which the user was at.
The attendance system answers the telephone take the user position as the foundation creation the rule. For example, when you when CEO office, may cause the system through the configuration not to have to call your handset.
Conference function
The good VoIP system should be able to support the audio frequency (or video frequency) the conference. Nurtures the divine or pristine element within oneself high the broadband VoIP conference telephone permission are very many the human in the different position by the normal intonation participation identical conference.
You also may bundle the teleconference function and the IP coordination application function in the same place, like this carries on in the conference, participation can swap the file, the synchronized calendar, the sharing lecture text, even sees other person’s computer desktop. Such function is called the unification exchange (unified communications).
Many enterprises provide the enterprise the unification exchange solution. Microsoft’s plan is Office Communications the Server 2007 (OCS), has provided based on the SIP call, based on arrives the function VoIP call management, short news as well as audio frequency, video frequency as well as based on network conference function.
Fusion function
Changes VoIP and unification communication five kind of situation _ makes the toll free number in 0av.info
The beginning will resolve the implementation flow
About ten years, can appear a pledge each approximately to be able to change the small and medium-sized enterprise (SMB) service operation mode the new technology. We stated this fact the target is not needs to show whether these new technologies do bring the help to the enterprise, but how is must discuss integrates these new technologies in the existing service flow and the system. Obviously, the fusion speech sum also belongs to this kind of new technology according to the network, it can provide IP speech (VoIP), the unification news, Web and the video frequency conference as well as the integrated call core control using the unification communication.
The replacement tradition PBX system work is carrying on methodically, but the basic question has still not obtained the thorough solution: Completes below through any mode converts SMB usually to be able to select the beginning:
Newly built or moves the company
If you are the company which had been established newly, or is moving, will not be able to meet the too many technical question, because you might in not have the original communications system burden, even in will not have under the original data network premise to establish the commercial communications solution.
Deployed brand-new whether succeeds is decided by following several factors:
Plan
Recognition risk factor
Understands the client service demand
Formulates and follows the feasible deployment plan
Attention detail
Merge and merger and acquisition
Not any gives the company compared to the merge or the merger and acquisition, SMB, brings in particular the influence was bigger. Between, all turned two sets suddenly: Two sets of databases, two cost systems, two communication networks. Very many companies all detected that, the merge or the merger and acquisition are actually change the unification communication the timeliness. The formulation merger and acquisition or the merge migration plan usually encompasses five important processes:
The determination deployed progress, sequence and method;
Appraised the existing IP infrastructure is ready the degree;
Establishes between the new old system the interoperability;
The formulation transfers the data and the communication service from the traditional module to the IP module plan;
Carries on the adjustment in view of the new service flow, provides function training for the end-user.
Replaces the existing device
Your firm possibly looks like several thousand enterprises to need to replace PBX or the Centrex system equally, because these systems not flexible or too expensive, cannot support the service development. In the usual situation, the enterprise needs simultaneously to upgrade the data network. By now, should better deploy first the data network, then was divided the phase implementation unification communication solution again.
This kind of migration main challenge is usually not the technical itself question, but is the staff the contradiction which produces naturally to the technical change. In order to solve this problem, the enterprise may participate in the technological transformations plan from the plan phase on attraction company each kind of important personages, and careful formulation detailed migration plan, including:
Function requirement documents
The network is ready the degree documents
Before comprehensive promotion carries on the department to test first
Establishment call core
An investigation carries on which according to Sage Research, not only uses the IP communication in the call core the organization to be able to add the income, but also can enhance the productivity: 74% company’s each bit of sale acted each month to add 5,000 US dollars sales volumes, nearly 50% representative every day could equally the multiprocessing 30 or more telephones.
Deployed when IP call core below, should note the aspect:
Formulates the meticulous plan
Searches solution which may expand
Consults with the manufacturer early
Guaranteed the network can in and has using the integration and the current capacity two aspects satisfies the integrated type call core the requirement, moreover cannot reduce the grade of service or the usability
Listens to staff’s suggestions and the recommendation, guaranteed the project has staff’s support from the very beginning
One time integrates a branch office
“The plan, the test, releases” the dozens of years always is the golden rule which the IT organization carries out, in particular regarding fast development company. Regarding very many SMB, this law similarly is also suitable, they may first test the unification communication in a branch office or the department, then promotes again to other site even entire company.
Regardless of your firm is the new company, plans the replacement obsolete speech system, hoped uses the new technology to reduce the cost and to promote the corporate growth, the unification communication all to be able to provide very many superiority for you. So long as passes through the earnest plan, and obtains the manufacturer help, this technical implementation does not look like the people to expect such complex.
The development facility announces VoIP security loophole
The VoIP security risk is prevents the multi-IT department to use one of this system primary factors. In addition, in order to resist stops refuses to serve attacks (DoS), the buffer overflow attack and the hacker attack, very many companies prepare to discover these hideaways the security loophole.
In which has this kind of company, this kind of resistance will already continue to be near three years half time. In a recent statement, Sipera the VIPER laboratory in view of (was specially AOL,AVAYA,MSN and Nortel Corporation’s product) has given seven new secure recommendations based on the SIP software telephone and based on the WEB immediate message service. Moreover also was Avaya Corporation put forward four proposals based on the SIP hardware telephone.
In 2003, the Sipera system limited company created, is in conspiracy with the correlation association Sipera the VIPER laboratory to find out these to threaten VoIP in the enterprise smooth use security loophole. In carries on the strict test after VoIP and the IP communication, Sipera Corporation announced they already as necessary prepared can hinder the VoIP telephone equipment and the software telephone normal application hole for the manufacturer and user circular these,
“The VIPER laboratory only pays attention to VoIP and the unification communication,” sells responsible cloth Linda to say. “Discovers the hole ahead of time, may cause us at suffers before the attack to complete to VoIP the safeguarding.”
The VIPER laboratory submits these warnings indicated the VoIP software telephone is very easy to appear such as the resource to dry up, the buffer overflow, refuses to serve the attack as well as the SIP parse error question. In order to send out these warnings, the VIPER laboratory first relates the manufacturer, provides the latent hole to them which the hardware and the software exist. Once manufacturer pay attention these holes, Sipera Corporation on submits all results to the consumer, including produces the latent question system as well as these products.
In the recent warning, VIPER had detected massive only produces in the software telephone hole.
“The software telephone has provided the very big flexibility to the communication, but extremely is actually easy to come under the attack. These can cause the VOIP system not merely to suffer the risk, but also can endanger to the network conditions normal operation. Krishna Kurapati (Sipera system limited company founder/chief technology official, Manager Sipera VIPER laboratory) said that,“These unknown holes can destroy the important commercial trade and personal telephone communication, this has suppressed VoIP very many superiority. Sipera is willing changes together with the customer and the manufacturer in the question serious front discovers these risks.”
Is aims at the AVAYA Corporation model specially to the hardware telephone risk recommendation for 4602SW’s telephone, because this kind of model telephone is very easy to fall into is attacked, if camouflages a server to receive the information which these stochastic IP source address transmits, the UDP port exudes Hong, the RTP port exudes Hong. These holes can cause this kind of telephone evil intention call, refuses to serve, with speech drop in quality.
VIPER represented provides in them to in the seller warning also includes these contents, their report of investigation confirmed this may reduce the known hole very greatly the hazardous nature. VIPER thought compares forewarns merely for the seller and the manufacturer, through gives the seller, the manufacturer, the user hole three aspects submits the warning, may better protect the hacker to the existing VoIP attack.
In is inquired about these warnings so are why important, Ziolo emphasizes: “VoIP is Internet’s one kind of application, has its security requirements, understood this point is very important, the enterprise should realize to must establish a secure VoIP network is a very big challenge–Is not not impossible, this need expenditure massive time, do the massive work.”
“The VoIP risk factor cannot prevent the company to implement the VoIP system,” Ziolo supplemented, “they can suppress the company to go to implement the VoIP superiority fully.”
How prevented the hacker intercepts VoIP to converse on the telephone
Because the telephone conversation price is cheap, the VoIP technology already became more and more popular, in particular in the long-distance telephone call and the international telephone expense aspect, VoIP might save the massive communication expense for the enterprise. Moreover, VoIP also implemented the double network to gather a control, called the function high-level, as well as the unification news might let the user through a unified interface direct access speech mail, the email, the text information, facsimile as well as other access communication content.
But, the security still was the VoIP existence question, also is the restriction are very many personal user and the enterprise users deploys VoIP the chief obstacle. The telephone content involves sensitive and the secret content when in particular, the security appeared is more essential. Certainly, VoIP also can receive with the data network same type attack, for instance refuses to serve attacks (DoS) to be possible to let the enterprise the VoIP service paralysis.
But said regarding the VoIP user, but also some special security problem, is the hacker has the possibility to intercept the user the telephone conversation content. In this paper I introduced hacker commonly used some intercept the VoIP telephone conversation content the mode, and studies will be supposed through any mode to prevent the enterprise users the VoIP telephone conversation content is intercepted.
Nearly all people all knew that, the traditional telephone channel is very easy to intercept. For instance will intercept the device to put in the telephone in the receiver, or will connect an interception device on the outdoors line. Moreover, (if if you swap the machine room in the telecommunication legal permission), you also may intercept on some line casually the telephone conversation content.
Also, wireless detects the device to be possible to monitor in the room the non-rope telephone or the honeycomb telephone communication content. Some specialists also may through the high-quality device interception satellite telephone as well as the microwave communication content.
Regarding tradition telephone channel intercepting, the American federation law and the constitution continuously all have the regulations. But the law only then just appeared in view of the VoIP provision. Regarding similarly is suitable without the permission invasion business computer network crime indictment for the hacker to the VoIP network invasion, the attack as well as the interception.
This is a good news, because of intercepts the VoIP communication not to be truly difficult, hacker’s method very are also many, but the law may to frighten the function from a side. Because the majority of VoIP telephone conversation all is transmits through the Internet, the hacker might look like formerly intercepts the ordinary data equally to intercept the voip data packet from any place.
Because VoIP is the speech signal sampling is the digital format, the hacker must reconstruct from the massive binary data the actual speech telephone conversation, therefore monitored the VoIP telephone conversation and the monitor tradition PSTN telephone compares many some difficulties.
Unfortunately, solves this problem not to need any profound programming skill. At present on the network has the very many free crack to be possible to complete the capture, reconstructs and broadcasts complete set work and so on VoIP telephone conversation content. Although the hacker may use these tools not to extract the VoIP telephone conversation content after the confirmation, but these tools also may use in the good aspect. The VoIP administrator may use these tools to test enterprise own network the security.
The user demand resolved VoIP development _ makes the toll free number in 0av.info
Said to the user that, VoIP inexpensive and even the free price is its most attractive place. The different user mainly displays to VoIP each kind of demand in following several aspects:
(1) has the broadband access resource.
(2) is sensitive regarding the price. For example the student, the labourer and so on the low income crowd, they are extremely sensitive regarding the price. This part of crowd is easier to become each category of network telephone the expense main body.
(3) has the massive long-distance telephone call demand. For example the student, leaves home in the outside labourer, as well as has the trunk-line service small and medium-sized enterprise massively, has touches on foreign affairs the service foreign trade company, the stationed in China organization office, has many branch office’s major industry and so on. These communities have the massive long-distance telephone call demand, even is the international long-distance telephone call demand. Therefore, these communities all are the VoIP main latent clients.
(4) is not high regarding the secure requirement. The use network telephone user mostly regarding essential factor requirements and so on security, stability which converses on the telephone is not very high.
(5) accepts ability regarding the new thing. The use network telephone consumer mostly accepts ability regarding the new things quite to be strong, also has certain cultural quality.
(6) increment service demand which provides to VoIP. The enterprise users deployed the VoIP general investment is big, majority of times and enterprise’s informationization construction synchronization carries on, involves the software and hardware and so on many aspects. Except the efficient in consideration, the enterprise also hoped can enhance the operating efficiency through the VoIP implementation, reduces other software and hardware cost and so on many aspects.
