Abbreviated Alert: An alert order that informs the user that a previous function selected is still active.>more
Absorption: Dissipation or loss of electromagnetic energy in the medium through which the energy passes. Measured is decibels (dB).>more
Access Attempt : A sequence of one or more access probe sequences on the Access Channel containing the same message. See also access probe and access probe sequence. cf. Analog access channel>more
Access Channel: A reverse communication channel used by a mobile station to communicate to a base station when not assigned to a traffic channel. The Access Channel is used for short signaling message exchanges...>more
Analog: An analog means continuously varying in frequency and amplitude. Television and telephones have traditionally used analog technology for re-creating voice and pictures. Analog technology is much...>more
Application sharing: A feature supported by many desktop videoconferencing systems that allows participants at both ends of a videoconference to view and edit the same computer application or document.>more
Asynchronous communication: Interaction between two or more people that is time delayed, that is, separated by minutes, hours, even days. Correspondence courses and e-mail are asynchronous forms of distance learning. The...>more
Audio Conferencing: Voice communications, traditionally accomplished using standard telephone lines, with new technologies, such as Internet telephony gaining a portion of the market. When more than one person is in...>more
Backhauling : The carrying of cellular calls between the cell sites and the cellular switch(MSC) via a landline network prior to re reaching the PSTN.>more
BRI - Basic Rate Interface: A digital communications circuit with 128 Kbps of bandwidth. ISDN BRI circuits can send three digital signals over a single pair of copper wires: 2 voice (B) channels and 1 signal (D) channel.>more
Broadband: A high-capacity communications circuit. It usually implies a speed greater than 1.544Mbps.>more
Codec: Coder-Decoder. Videoconferencing hardware that codes the outgoing video and audio signals and decodes the incoming signals. Prior to transmission, the codec converts analog signals to digital...>more
Compressed video: When the vast amount of information in a normal television transmission is squeezed into a fraction of its former bandwidth by a codec, the resulting compressed video can be transmitted...>more
Digital: Information stored in a binary language of ones and zeros. Computer technology is digital. Audio/video signals represented by discrete variations (in voltage, frequency, amplitude, location,...>more
Drive: A drive is the power electronics which is used to control the speed of a motor. Common names used for drives are inverter or amplifier. Drives may be smart or dumb. * Smart drive - has some...>more
H.320 standard: A widely-used video compression standard that allows a wide variety of videoconferencing systems to communicate. The H.320 standard was approved by the International Telecommunications Union...>more
ISDN: Stands for Integrated Services Digital Network. ISDN is a digital network that provides for communications of voice, video, and data between desktop videoconferencing systems, group...>more
Narrowband: A low-capacity communications circuit. It usually implies a speed of 56Kbps or less. >more
Networking: The connecting of multiple sites for the transfer and/or exchange of information via computers. >more
PWM Drive: A drive is the power electronics board which is used to control the speed of a motor. Drives may use various techniques to control speed. A moderately low-cost form of drive for controlling...>more
SCR Drive: A low-cost form of drive for controlling DC motors makes use of a special type of power transistor called an SCR. Hence the term SCR drive. An SCR acts as a gate to allow a precise amount of...>more
Synchronous communication: An interaction between individuals or groups that occurs at the same time. That is, with no appreciable delay between the end on one message and the beginning of another. Face-to-face,...>more
Teleconferencing: The use of electronic channels to facilitate communication among groups of people at two or more locations. Teleconferencing is the generic term that refers to a variety of technologies and...>more
