VBR

Webopedia Staff
Last Updated May 24, 2021 7:58 am

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.