Your particular speed/price needs and destination determine the size of your line. At-your-door symmetrical bandwidths offered depend on your specific physical address and are generally available at these dedicated levels:

• DS-1 – 1.544 Mbps digital circuit, supporting up to 24 DS-0s
  The most common speed used for voice and data communictaions for small to medium sized locations 
• DS-3 – 44.736 Mbps digital circuit, supporting up to 28 DS-1s or 672 DS-0s
  Commonly used for medium to larger locations
• OC-3 – 155.62 Mbps optical circuit, supporting up to 3 DS-3s or 84 DS-1s
  Good for customers with high bandwidth and mixed-media needs
• OC-12 – 622.08 Mbps optical circuit, supporting up to 4 OC-3s, 12 DS-3s or 336 DS-1s
  Sized right for data center, call center and command connections
• OC-48 – 2,488 Mbps optical circuit, supporting up to 48 DS-3s or 1,344 DS-1s
  Very high-speed SONET transport service when your transaction volumes demand it
• OC-192 – 9.6 Gbps optical circuit, supporting up to 192 DS-3s
  Only for the biggest needs - you know who you are.

These are available options for your Private Line connection:

• Channel configurations – Full –lear or channelized configurations are supported
• Customer Interfaces Available – RJ45, BNC, RS232 and FC, SC, ST optical connectors