Voice over Secure Internet Protocol

Definition
Voice over Secure Internet Protocol (VoSIP) is

"[t]he instantiation of Internet Protocol (IP) Telephony on a classified local area network or wide area network infrastructure that provides the routing of voice conversations using the Secure Internet Protocol Router Network (SIPRNet) as the transport medium. The use of the SIPRNet allows users in secure environments to communicate at the Secret level without the need for specialized phones or the use of key material."