Is a protocol that ensures secure communication between the client and server on the network. When a server communicates with the customer, TLS ensures that no third party can eavesdrop or tamper with any message being passed between these parties. TLS is the successor to the Secure Sockets Layer (SSL).
The account administrator may wish to encrypt the voice data on a user’s calls. To do this, the administrator can turn call encryption on or off at the user level.When TLS encryption is enabled, the signalling information is handled using TLS, and the voice data (the SIP packets) are encrypted using SRTP. If a user enables TLS, all the SIP packets will be encrypted to assure that the content cannot be read by malicious people. The SRTP is enabled automatically when TLS is turned on.