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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.

 
Related Categories

Data Transfer Rates

Networking Standards

Videoconferencing

Related Terms

ABR

ATM

CBR

QoS

throughput

UBR

videoconferencing

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