Voip vulnerabilities
Imagine receiving spurious calls over your voice network. A sizable number of such calls could render a VoIP telephone system unusable. In fact, VoIP systems are much more sensitive to parasitic operations than email, because of the real-time nature of telephone conversations. With email, a delay of a few minutes is usually not a big deal, but on a telephone system a delay of a few seconds will make it almost impossible to hold a meaningful dialog. So, interference with a VoIP system tends to show up much sooner.
Fraud is another problem, with hackers patching into a telephone system and using the company’s telecom resources to make long distance calls, which may end up costing the enterprise thousands of dollars a month. While this possibility also exists with more traditional PBX systems, VoIP systems are more prone to this type of crime, because the techniques of Internet hacking are much more widely known.