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Maximum Dedicated Bandwidths*
How fast is fast? This chart puts into perspective line speeds used in Internet backbones, LANs, and WANs.
| 13.21 Gbps
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OC-255
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| 10 Gbps
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OC-192
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| 4.976 Gbps
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OC-96
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| 2.488 Gbps
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OC-48, STS-48
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| 1.866 Gbps
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OC-36
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| 1.244 Gbps
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OC-24
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| 933.12 Mbps
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OC-18
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| 622.08 Mbps
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OC-12, STS-12
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| 466.56 Mbps
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OC-9
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| 155.52 Mbps
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OC-3, STS-3
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| 100 Mbps
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CDDI, FDDI, Fast Ethernet, Category 5 cable
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| 51.84 Mbps
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OC-1, STS-1
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| 44.736 Mbps
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T-3, DS-3 North America
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| 34.368 Mbps
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E-3 Europe
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| 20 Mbps
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Category 4 cable
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| 16 Mbps
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Fast Token Ring LANs
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| 10 Mbps
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Thin Ethernet, category 3 cable, cable modem
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| 8.448 Mbps
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E-2 Europe
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| 6.312 Mbps
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T-2, DS-2 North America
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| 6.144 Mbps
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Standard ADSL downstream
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| 4 Mbps
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Token Ring LANs
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| 3.152 Mbps
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DS-1c
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| 2.048 Mbps
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E-1, DS-1 Europe
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| 1.544 Mbps
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ADSL, T-1, DS-1 North America
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| 128 Kbps
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ISDN
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| 64 Kbps
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DS-0, pulse code modulation
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| 56 Kbps
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56flex, U.S. Robotics x2 modems,
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| 33.6 Kbps
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56flex, x2 modem communications rate
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| 28.8 Kbps
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V.34, Rockwell V.Fast Class modems
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| 20 Kbps
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Level 1 cable, minimum cable data speed
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| 14.4 Kbps
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V.32bis modem, V.17 fax
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| 9600 bps
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modem speed circa early 1990s
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| 2400 bps
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modem speed circa 1980s
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Units of Measurement bit= smallest unit of digital information, i.e. ones & zeros
byte= a set of bits
bps= bits per second
Kbps= kilobits per second =1000 bits per second
Mbps = Million bits per second =1,000,000 bits per second
Gbps = Gigabits per second = 1,000,000,000 (one billion) bits per second
Tbps = Terabits per second = 1,000,000,000,000 (one trillion) bits per second
*Editor's note: individual components in the bandwidth measurement chart have not been separated by Open Systems Interconnect (OSI) protocol layer or media.
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