CALEA – Communications Assistance to Law Enforcement Act

LEA – Law Enforcement Agency

Tap(s) – The point in the network where information is gathered

Probe – The device used to instruct the Tap on what information to gather and to transmit the information to the Mediation Server

Mediation Server – The point where information is translated into the format requested by the LEAs

VPN Tunnel – The secure connection through the Internet, between either the Mediation Server and the Probe or between the Mediation Server and the LEA

TTP – Trusted Third Party – Entity authorized to interface with the LEA on the behalf
of the CALEA Responsible Party

CALEA Responsible Party – Entity who ‘owns’ the end user, who is subject to the intercept request

IP Video Telephony – Format where video signals are sent across the internet for home reception.
These signals can also be used for Video Relay Service

Video Relay Service - A form of Telecommunications Relay Service (TRS) that enables persons with hearing disabilities who use American Sign Language (ASL) to communicate with voice telephone users through video equipment rather than through typed text

PSTN – Public Switched Telephone Network, utilized in the transport and transmission of common
telephone conversations

Warrants – The instrument utilized by LEAs and others to legitimately request the interception of specific information to or from an end user