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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 13 store offers from $170 - $240 Apple iPod touch 3rd Generation (64 GB) MP3 Player 14 store offers from $360 - $527 Apple iPod classic 6th Generation Black (160 GB) MP3 Player 13 store offers from $220 - $400 Apple iPod touch 1st Generation (16 GB) MP3 Player 4 store offers from $166 - $499 Apple iPod touch 3rd Generation (32 GB) MP3 Player 7 store offers from $279 - $299