Glossary

  • Bridge - A device that enables the connection of multiple videoconference systems in one conference. A bridged videoconference may also be called a multipoint or a multiway videoconference. TTVN has the capacity of bridging up to 48 sites in one videoconference. (See also MCU.)
  • Broadband - A medium bandwidth data connection. Typically, the term broadband is associated with cable modem or DSL service to homes and small businesses. Broadband service needs to have symmetrical bandwidth to support TTVN videoconferencing. Symmetrical bandwidth is usually available only with business-class cable modem or DSL service. Consumer-class cable modem or DSL service is acceptable for TTVN live video streams.
  • Certified Videoconference Site - Any videoconference site that meets TTVN technical requirements, has provided TTVN with specific site information, and has successfully completed a test videoconference. (See also Registered Videoconference Site.)
  • CODEC - Another common name for a videoconference system. In actuality, a CODEC (or Coder/Decoder) is the core processor of the videoconference system. Videoconference CODECs may be hardware or software.
  • Continuous Presence - A videoconference screen display format enabled by a bridge or MCU. Continuous Presence (CP) displays multiple site video images onscreen simultaneously. CP may display up to nine images on screen. The images are much smaller than the standard full-screen video image and may be arranged in various layouts on the screen.
  • Firewall - A software package or hardware device that controls or limits IP traffic in and out of a network or network device. Firewalls are used to protect the network and network devices from malicious intrusion or unauthorized usage. A certain range of firewall ports must be open for H.323 videoconference data packets.
  • Gatekeeper - Controls access to a network and controls the bandwidth allocated to network traffic such as videoconferences. Gatekeepers also control network addressing.
  • Gateway - A device (frequently integrated into a bridge) that enables the connection of H.323 (IP) and H.320 (ISDN) videoconference systems.
  • H.323 - The current international (ITU-T) standard for IP videoconferencing. Virtually all registered TTVN videoconference sites use H.323 IP videoconferencing.
  • IP - Internet Protocol. IP refers to the transport standards for data traffic over the Internet.
  • Live Video Stream - A one-way, non-interactive audio and video transmission. Most computers and mobile devices can receive a live video stream. A live video stream can be transmitted from any TTVN videoconference site.
  • Live Video Stream Recording - A live video stream recording can be produced for any TTVN videoconference.
  • MCU - Multipoint Control Unit. A device that enables multiple videoconference systems to be connected in one conference. (See also Bridge.)
  • Multipoint Videoconference (also called Multiway) - Connected through a bridge or multipoint control unit (MCU), a multipoint videoconference enables multiple videoconference systems to interact in one videoconference. While most multipoint videoconferences involve less than twelve sites, TTVN has the capacity to connect up to 158 videoconference systems in a single videoconference.
  • Network - A system of communications between two or more devices. An office or campus network may be characterized as a Local Area Network (LAN). TTVN operates a Wide Area Network (WAN) that serves many locations in Texas.
  • Registered Videoconference Site - A certified videoconference site owned and operated by a member campus or agency of the Texas A&M University System.
  • Site Code - A distinct number given to each TTVN videoconference site. Site Codes are used to readily identify and schedule TTVN videoconference sites.
  • Site Contact - A designated person for each TTVN videoconference site who handles site scheduling, user assistance, and general site logistics.
  • TTVN Operations - The technical control center for all TTVN videoconferences and live video stream events. TTVN Operations staff is available for user and technical support during all scheduled videoconferences and live video streams. TTVN Operations can be reached by telephone on 979-862-2241.
  • TTVN Scheduling - TTVN Scheduling coordinates all scheduling of videoconferences and live video stream events. TTVN Scheduling also provides pre-videoconference user consultation and general information about TTVN services. TTVN Scheduling can be reached by telephone on 979-862-2240.
  • Videoconference - An interactive two-way audio and video communication experience.
  • Voice-Activated Switching – Changes the full-screen video image as individuals talk. As an alternative, videoconferences may use Continuous Presence, where multiple site video images are displayed simultaneously on screen.
  • Videoconference - An interactive two-way audio and video communication experience.
  • Voice-Activated Switching – Changes the full-screen video image as individuals talk. As an alternative, videoconferences may use Continuous Presence, where multiple site video images are displayed simultaneously on screen.