Analysis of problems in VoIP technology and application

For VoIP technology, there are many love, there are many hate. The following is a collection of six "difficult questions" about VoIP applications and reports in the past few years, as well as six reasons not to use VoIP. None of these questions will allow you to eliminate this technology from business considerations. However, all of these problems you have to consider when considering the use of this technology.

1. The headaches of reliability. This is a basic principle of manufacturing engineering, but also a very simple common sense, the less parts of the product is more reliable. If that is true, then VoIP will be in the beginning to face a major blow. Unlike digital networks that require only telephone switching devices, cabling, and telephones, VoIP increases the complexity of the data network. The choices made at those layers outside the VoIP network will consist of or interrupt a voice system. Restarting the router or switch will cause the phone to drop. Lost power and poorly designed data networks do not know where to send the voice.

2. Hidden costs. With 2-3 years of 100mb/s and even 10mb/s infrastructure, there may be plenty of fuel left to use. However, to convert to VoIP, businesses must purchase new devices or even new cable lines. They need switches that can perform 802.1p and 802.1q standards. These switches may also need to be configured with inline Power technology (802.3AF standard) if they are to be maintained during power outages. Overall, the new edge switch will take at least 68 dollars for a 48-port switch. VoIP-enabled routers, such as HP's 7000DL ProCurve security router, are priced at $1173 to $2303 depending on the configuration. This does not include the cost of network design, installation and maintenance contracts.

3. A lot of insecurity. People who blindly believe in VoIP will remind you that eavesdropping on a payphone is just a tricks for any experienced technician. However, what they do not remind you is that although public telephone switched networks have security vulnerabilities, VoIP also has to cope with a combination of global accessibility and easy-to-use hacker tools. Users who do not know how to eavesdrop and war dialer may download "Cain and Abel" or "Trinity" tools to eavesdrop on the phone or implement a mass denial of service attack to paralyze a phone number. Companies that consider using VoIP must fix these vulnerabilities if they want the voice network to be secure.

4. Poor call quality. Digital telephones are very good. Pick up the phone and dial it to call. The voice never sounded like a phone that had been poured into the water. However, using VoIP phones on poorly designed networks, you will find that voice is full of vibrato, echoes, and serious distortion.

5. The legend of the soft telephone. Some radical VoIP providers argue that PCs can be used instead of telephones. Use only one USB headset and one phone software can be done. Businesses can save a lot of digital telephone costs. The fact is that most companies find the performance of this soft phone very erratic. The combination of Windows XP and PCs has so far not provided an efficient way to prioritize voice threading. It is also very difficult to eliminate the echo of the phone. (Computer science)

6. Dilemma: What is the size of the access circuit needed to service 114 telephones on a VoIP network? Don't be annoyed at not knowing the problem. It takes a lifetime for a voice engineer to solve this problem. This problem is very difficult in the digital realm, but it is more complex in the area of VoIP. Is this a public telephone exchange network that leads to VoIP networks? If it is to the VoIP network, what codec does this phone run? What is the basic transmission network? What other applications share this access connection? The implementation of voice engineering on any type of WAN is a very complex science. When this network is a VoIP network, it must be more complex.

Finally, most businesses are turning to VoIP technology to cut spending. They logged off the switch and the upgrade time. They often find that the cost of current maintenance contracts is close to the cost of deploying new IP switches. There are also many reasons to switch to VoIP. But there are few reasons to persuade most companies to switch to VoIP.