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Cable modems can theoretically run up to 38Mb/sec downstream, and 10Mb/sec upstream.

Most providers cap (limit) you depending on your service plan. A common number is 1.5Mb(down)/128Kb(up).

Ask your provider for their numbers.

Feedback received on this FAQ entry:
  • My comment on your "common number is.... " From My Charter Cable Service, I pay for 25Mb Down & 8Mb Up. I never get less than 19 Mb Down and 5 Mb Up.

    2012-09-05 19:03:19 (Fox Mulder See Profile)

  • DOCSIS 3.0 with 4 channels (minimum required) has a theoretical downstream throughput of 152 Mbit/s with a upstream of 108 Mbit/s For more information on DOCSIS (Data Over Cable Service Interface Specification) throughput see: http://www.cablelabs.com/cablemodem/ http://en.wikipedia.org/wiki/DOCSIS

    2011-08-13 22:35:06 (bishun See Profile)

  • This section is a tad out of date. The DOCSIS modems that support channel bonding may have different theoretical upper limits, and common downstream and upstream speeds should probably be omitted since they change all the time.

    2008-03-08 13:52:57 (Andypro See Profile)

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by Raydr See Profile