Designing VoIP security system for organizational network

Communication is one of an important aspect in life that supports a lot of activities. Along with the development of technology, method for communicating is also increasing. One of those methods for communication that created by advanced technology is called VoIP or Voice over Internet Protocol. At the present time, VoIP is used by a many organizations. It is because implementing VoIP has many benefits for them to support their communication system. However, implementing VoIP to support organization communication system is not always helping their organizational activities. In many cases, implementing VoIP is disturbing the communication process. Usually, it is because security threat that affects the quality of services provided by VoIP system. The solution for that security problem is building a VoIP security system that considers the QoS of VoIP services.