Is Voice over IP much less secure and much less robust than good old-fashioned POTS? Let me try to answer the question with a back-to-front thought experiment. One way to manage a risk is to 'share' it. In other words, you pay a premium to an insurance company so that when something goes wrong, the cost falls on the insurer and not on your business. With more and more corporations switching to IP-based telephony to cut costs, if their risks are higher, then an economically rational market...