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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 MP3 Players VBR Products Shop by Top Models: Apple iPod touch 2nd Generation (8 GB) MP3 Player 14 store offers from $164 - $290 Apple iPod touch 3rd Generation (32 GB) MP3 Player 11 store offers from $225 - $314 Apple iPod touch 3rd Generation (64 GB) MP3 Player 12 store offers from $314 - $501 Apple iPod touch 1st Generation (32 GB) MP3 Player 5 store offers from $255 - $698 Apple iPod nano 5th Generation Black (8 GB) MP3 Player 12 store offers from $120 - $161