When we talking about secure communication we consider a communication which cannot intercept by third party, two people can share their information without any third person involvement. In IP Communication security is a big issue naturally this is unsecured communication which can be protected by using some security tools.

Linux is a free and open source operating system it was developed by Linus Torvalds in 1991.Linux operating system also known as fast performing operating system. Unlike Window OS, Linux is an open source and also open publically anyone customize it according to their need.

We cannot ignore the importance of technology in the filed of communication. We also know the importance of communication in every field of life. Technology has change the way of communication. Communication is become fast and reliable which was not before as. Communication in business play a key role to increase the productivity and efficiency.

FreeSWITCH is a communication software solution used for voice and messaging applications. It is a free and open source communication software solution licensed under Mozilla Public License. Using FreeSWITCH, we can build PBX, softphone and softswitch. FreeSWITCH use Sofia Sip stack this stack is fully mature robust and complete.

VoIP communication is a form of communication which enable us to make phone calls by using internet connection instead of using analog telephone lines. Usually VoIP allow you to call those who received the calls on internet. By using interconnected VoIP service you will be able to call landlines number and also received from landlines numbers.

LDAP (Lightweight Directory Access Protocol) is protocol which provide the feasibility of maintaining, organizing, monitoring and distributing of data over an internet protocol network either public Internet, corporate intranet or both. Directory service of LDAP play very useful role for sharing the information of users, services, systems, applications and individuals through the network