One thing that i must tell you that network security is different form VoIP security
. If your network is secure that doesn't mean that your VoIP system is secure too. VoIP can be used in business communication only if its vulnerabilities are removed. The biggest nightmare would be that your phone's IP address is spoofed and someone else is enjoying VoIP talk on your expenses.Authentication and encryptiopn techniques are required to be developed to keep unwanted intruders and eaves droppers at bay. As we all know, Session Initiation Protocol is the main signalling protocol used in VoIP Technology. There are laws to prevent eavesdropping in traditional phone systems but IP Telephony is still very young to be governed by any law. Spamming too is one such threat that need to be discussed.
tags: VoIP Security