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Maximum Dedicated Bandwidths

How fast is fast? Chart puts into perspective line speeds used in Internet backbones, LANs, and WANs.

How fast is fast? This chart puts into perspective line speeds used in Internet backbones, LANs, and WANs.

Speed of Internet backbone standards

13.21 GbpsOC-255
10 GbpsOC-192
4.976 GbpsOC-96
2.488 GbpsOC-48, STS-48
1.866 GbpsOC-36
1.244 GbpsOC-24
933.12 MbpsOC-18
622.08 MbpsOC-12, STS-12
466.56 MbpsOC-9
155.52 MbpsOC-3, STS-3
100 MbpsCDDI, FDDI, Fast Ethernet, Category 5 cable
51.84 MbpsOC-1, STS-1
44.736 MbpsT-3, DS-3 North America
34.368 MbpsE-3 Europe
20 MbpsCategory 4 cable
16 MbpsFast Token Ring LANs
10 MbpsThin Ethernet, category 3 cable, cable modem
8.448 MbpsE-2 Europe
6.312 MbpsT-2, DS-2 North America
6.144 MbpsStandard ADSL downstream
4 MbpsToken Ring LANs
3.152 MbpsDS-1c
2.048 MbpsE-1, DS-1 Europe
1.544 MbpsADSL, T-1, DS-1 North America
128 KbpsISDN
64 KbpsDS-0, pulse code modulation
56 Kbps56flex, U.S. Robotics x2 modems,
33.6 Kbps56flex, x2 modem communications rate
28.8 KbpsV.34, Rockwell V.Fast Class modems
20 KbpsLevel 1 cable, minimum cable data speed
14.4 KbpsV.32bis modem, V.17 fax
9600 bpsmodem speed circa early 1990s
2400 bpsmodem speed circa 1980s

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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