Network speeds

• Telephone modems: up to 56 kbps (bps = bits/second) analogue
• DSL modems: up to 3 Mbps, asymmetrical
• Cable modems: up to 4.5 Mbps, asymmetrical
• Ethernet
  • 10BaseT = 10 Mbps
  • 100BaseT (Fast Ethernet) = 100 Mbps
  • 1000BaseT (Gigabit Ethernet) = 1000 Mbps (coming soon)
  All using unshielded twisted-pair cables!
• Line bandwidths (examples)

  T1	1.54 Mbps
  T3	45 Mbps
  OC3	156 Mbps
  OC12	622 Mbps
  OC192	10 Gbps
  OC stands for optical carrier