T1
T1 has evolved into a service with a distinct set of performance characteristics. It offers contiguous routing of intermediate bit rate bandwidth in increments, using DS0 circuits. T1 service can also be offered as Fractional T1. Fractional T1 first appeared as a response to customer requests for a service with a capacity less than T1 but more than 56 Kilobits per second.
| High-speed bandwidth |
| High traffic volume |
| Fast response |
| Direct connections |
| Digital accuracy |
| Flexible |
| Aggregate voice and data traffic |