Cloud PBX Systems

We aim to keep your calls and data secure.

Voice Encryption

To ensure the confidentiality of communications, all voice packets passed between the remote VoIP phone and the Mitel Border Gateway are encrypted using the Secure Real-time Transport Protocol (SRTP), a security profile for RTP, which has emerged as the de facto industry standard for securing voice streams over IP. Secure RTP adds confidentiality, message authentication and replay protection to that protocol. Specifically, Secure RTP defines a set of default cryptographic transforms and allows new transforms to be introduced in the future. The security benefits of Secure RTP include:

• Confidentiality of the RTP payloads, as well as protection against replayed packets
• Low bandwidth cost, i.e., a framework preserving RTP header compression efficiency, and limited packet expansion
• Low computational cost
• High tolerance to packet loss and re-ordering, and robustness to transmission bit errors in the encrypted payload

Secure RTP is ideal for protecting VoIP traffic because it can be used in conjunction with header compression and has no effect on IP Quality of Service (QoS). These attributes provide significant advantages, especially for voice traffic using low bit rate voice codec’s such as G.729.