VBR Last modified: Wednesday, February 26, 2003
Short for variable bit rate, or Class B quality of service, an ATM bandwidth-allocation service that allows users to specify a throughput capacity (i.e., a peak rate) and a sustained rate but data is not sent evenly. VBR is often used when transmitting compressed packetized voice and video data, such as videoconferencing. Compare with ABR, CBR and UBR.
•E-mail this definition to a colleague• For internet.com pages about VBR . Also check out the following links!	Data Transfer Rates Networking Standards Videoconferencing ABR ATM CBR QoS throughput UBR videoconferencing Give Us Your Feedback MP3 Players VBR Products Shop by Top Models: Apple iPod touch (16 GB, MA627LL/A) Digital Media Player 7 store offers from $300 - $400 Apple iPod nano Third Gen. Silver (4 GB, MA978LL/A) Digital Media Player 8 store offers from $95 - $190 Apple iPod classic Sixth Gen. Black (80 GB, MB147LL/A) Digital Media Player 8 store offers from $195 - $250 Apple iPod Video Fifth Gen. White (30 GB, MA002LL/A) Digital Media Player 4 store offers from $160 - $499 Apple iPod nano Third Gen. Silver (8 GB, MA247LL/A) Digital Media Player 7 store offers from $170 - $200