Media encryption

Last Updated : Sep 22, 2016 |
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Communication Manager supports encryption for IP bearer channel voice data transported in Real Time Protocol (RTP) between any combination of gateways and IP endpoints. Encryption provides privacy for media streams carried over the IP network
Digitally encrypting the audio or voice portion of a VoIP call can reduce the risk of electronic eavesdropping. IP packet monitors, sometimes called sniffers, are similar to wiretaps for circuit-switched (TDM) calls. However, an IP packet monitor can monitor and capture unencrypted IP packets and play back the conversation in real-time or store it for later playback.
With media encryption enabled, Communication Manager encrypts IP packets before the packets traverse the IP network. An encrypted conversation sounds like white noise or static when played through an IP monitor. End users do not know that a call is encrypted because:
  • Visual or audible indicators are not present to indicate that the call is encrypted.
  • Encrypted calls and nonencrypted calls do not differ in voice quality.