Bandwidth Comparison Chart

Line Size Data Speed # of DS0's # of DS1's Is Equal to European Equivalent
DS0 64 Kbps 1 - - 64 Kbps
DS1 1.544 Mbps 24 1 - -
- 2.048 Mbps 32 - - E1
DS1C 3.152 Mbps 48 2 - -
DS3 44.736 Mbps 672 28 - E3
DS4 274.760 Mbps 4,032 168 - -
OC1 51.84 Mbps 672 28 1 DS3 -
OC3 155.52 Mbps 2,016 83 3 DS3's STM1
OC9 466.56 Mbps 6048 252 9 DS3's -
OC12 622.08 Mbps 8,064 336 4 OC3's STM4
OC48 2.488 Gbps 32,256 1,334 16 OC3's STM16
OC192 9.953 Gbps 129,024 5,376 64 OC3's STM64
OC255 13.271 Gbps 169,320 7,055 85 OC3's -
OC768 39.813 Gbps 516,096 21,504 4 OC192's 4 STM64's


  • Kbps = kilobits per second - (1,000 bits per second)
  • Mbps = megabits per second - (1,000,000 bits per second)
  • Gbps = gigabits per second - (1,000,000,000 bits per second)

  • T1 & T2 lines use standard copper wire.
  • T3 & T4 lines require fiber-optics or microwave.
  • OC (Optical Carrier) lines use fiber-optics.