VoIP Security Issues and Counter Measures
The number of VoIP implementations in organisations is changing dramatically and many exploit tools are introduced in the market to bring down these VoIP systems. It is necessary to safe guard your VoIP systems by proper designing, deploying and analysing VoIP traffic on a daily basis. Organisations should be prepared to handle such type of attacks and closely consider new solutions to improve the current practice.
Read the full article here - http://resources.infosecinstitute.com/securing-voip-systems/