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Voice over Internet Protocol (VoIP) represents the biggest change in the telecom industry in years, and its deployment is bringing dramatic changes to how businesses operate on a day to day basis. Its rich feature set has allowed smaller companies to gain access to high-end features, and and its low cost and collaborative technologies has ushered in a new era of collaboration across great distances. But despite the many advantages, there is still resistance to its deployment, largely due to a few incorrect misperceptions about the technology and the industry. Here are a few of these myths:

VoIP is less secure. It is incorrect to believe that standard PSTN(Regulard Analog Line) telephony is absolutely secure—anyone with physical access to the wire can easily tap into your calls. VoIP, as an Internet-based technology, does have security issues of its own, but these have been addressed with new technologies, encryption, and VoIP-compatible firewalls.
Sound quality is poorer than the PSTN. Again, not true. Early VoIP implementations did indeed suffer from poor sound quality, jittery calls and dropped connections, although VoIP experts have expended a great deal of energy and capital in its development. Call quality for VoIP is now equivalent to that of the PSTN.

Reliability is poorer than the PSTN (Regular Analog Line). The incidence of dropped calls, or inability to place a call during peak times was a real concern during the early days of VoIP, but these too have been addressed with new reliability techniques, prioritization schemes for VoIP packets, and more widespread use of high-bandwidth Internet connections.

VoIP is only useful when calling other offices with the same system. This is still a common myth and one that is absolutely incorrect. With most VoIP systems, you can place a call to anyone, anywhere in the world, regardless of what type of phone system they use, even to mobile phones.

Switching to VoIP requires a major capital investment. A hosted system requires no capital investment at all, and an on premises system does not usually call for any greater capital expenditure than you would have with a standard phone system.
You still need PSTN lines when with a VoIP deployment. There is no reason to maintain PSTN lines if you are using VoIP. All of your telephony needs can be met with the VoIP system.

You can’t send a fax over VoIP. Fax-over-IP has become very common and is highly efficient, offering greater quality and convenience than standard analog fax devices.
You need to make your calls through a computer. Computer-to-computer or computer-to-phone calls can certainly be made easily, but you don’t need to have a computer at your desk to make a VoIP call.

It’s only for small companies. In fact, companies of all sizes are moving to VoIP, and larger companies use it to great advantage not only for their office phone system, but also to establish convenient links between branch offices.

VoIP vendors are still too new to be reliable. The market is full of providers, both new and established—and many established telecom providers that have been in business for decades are now rolling out VoIP offerings.