Speed Tables
Maximum raw throughput including overhead (maximum usable throughput without overhead)
| Version | Downstream | Upstream | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Channel configuration | DOCSIS throughput | EuroDOCSIS throughput | Channel configuration | Upstream Throughput | |||||||
| Minimum selectable number of channels | Minimum number of channels that hardware must be able to support | Selected number of channels | Maximum number of channels | Minimum selectable number of channels | Minimum number of channels that hardware must be able to support | Selected number of channels | Maximum number of channels | ||||
| 1.x | 1 | 1 | 1 | 1 | 42.88 (38) Mbit/s | 55.62 (50) Mbit/s | 1 | 1 | 1 | 1 | 10.24 (9) Mbit/s |
| 2.0 | 1 | 1 | 1 | 1 | 42.88 (38) Mbit/s | 55.62 (50) Mbit/s | 1 | 1 | 1 | 1 | 30.72 (27) Mbit/s |
| 3.0 | 1 | 4 | m | No maximum defined |
m × 42.88 (m × 38) Mbit/s | m × 55.62 (m × 50) Mbit/s | 1 | 4 | n | No maximum defined |
n × 30.72 (n × 27) Mbit/s |
Common DOCSIS 3.0 speeds are listed in the table below.
| Channel configuration | Downstream throughput | Upstream throughput | ||
|---|---|---|---|---|
| Number of downstream channels | Number of upstream channels | DOCSIS | EuroDOCSIS | |
| 4 | 4 | 171.52 (152) Mbit/s | 222.48 (200) Mbit/s | 122.88 (108) Mbit/s |
| 8 | 4 | 343.04 (304) Mbit/s | 444.96 (400) Mbit/s | 122.88 (108) Mbit/s |
Note that the number of channels a cable system can support is dependent on how the cable system is set up. For example, the amount of available bandwidth in each direction, the width of the channels selected in the upstream direction, and hardware constraints constrain the maximum amount of channels in each direction.
Note that the maximum upstream speed on all versions of DOCSIS depends on the version of DOCSIS used and the number of upstream channels used if DOCSIS 3.0 is used, but the upstream channel widths are independent of whether DOCSIS or EuroDOCSIS is used.
Read more about this topic: DOCSIS
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