Most definitions found in this glossary are adapted with permission from this text book:

Maheu, M., Whitten, P., & Allen, A. (2001). eHealth, Telehealth & Telemedicine: A Guide to Startup and Success. New York: Jossey-Bass.

Browse the glossary using this index

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A basic message unit for communication in packet-switched networks. A single file may be broken up into packets for transmission, with each packet finding its own path to the destination, where the packets are reassembled. Most information transmitted over the Internet is in the form of packets.
Entry link: Packet


Any externally connected device attached to a videoconferencing or telemonitoring system to augment its communication or medical capabilities. Examples include electronic stethoscopes, otoscopes, ophthalmoscopes, dermascopes, graphic stands, and scanners.
Entry link: Peripheral


Pip stands for "Picture-in-a-picture" and allows you to see yourself in a small screen while having contact with your client. This allows you to see how you appear to whomever you are addressing. If you see half your face, just your armpit, or another person in your room -- this is exactly what your client sees when she speaks with you.
Entry link: PIP


The smallest and most fundamental picture element of a digital image. The greater the number of pixels in an image, the higher its resolution.
Entry link: Pixel


Describing the transfer of data from one computer to another.
Entry link: Point-to-point

Point-to-point Video Conference

Point-to-point video conference is a term used by ITU-T in the H.323 standard, and is in fact a basic point-to-point video call. Since per definition every call in H.323 is a conference call, the term 'point-to-point conference call' was coined.
Entry link: Point-to-point Video Conference


A Web site that is intended to be the first one people see when using the Web. A portal typically has a catalogue of Web sites, a search engine, or both, and may also offer e-mail and other services to entice people to use that site as their main "point of entry" to the Web.
Entry link: Portal


Plain old telephone service. The analog public switched telephone network used throughout the world, capable of voice and data transmission at up to 56 Kbps.
Entry link: POTS


A system of guidelines and procedures, applying to both hardware and software, that controls communication between computer devices. Protocols are primarily concerned with three aspects of the communication process: how data are symbolized and coded, how data are transmitted, and how errors and failures are recognized and corrected.
Entry link: Protocol