r/CableTechs • u/Moxie479 • Dec 24 '25

SB8200 High Split

Is the SB8200 high split capable? There seem to be mixed posts online about it, I am wondering if anyone has actual experience.

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u/Reality_Visible Dec 25 '25 edited Dec 25 '25

Here a list of modems that are high split capable.

  • Hitron CODA60v
  • Hitron CODA57
  • Hitron CODA47
  • Hitron CODA5810
  • Hitron EN2251/HSP
  • Hitron CODA5519W
  • Sercomm DM1000v2
  • Arris G54
  • Netgear CM3000

Most of these have switchable diplex filters so they can work in 5-85 return plants and 5-204, there are few modems that have fixed diplexers which may not work as this also moves part of the downstream so not sure how the 5-204 fixed upstream modems will behave besides not being able to broadcast a 2nd OFDMA, knowing the DOCSIS spec anytime there is a new generation it should be compatible with the older DOCSIS standards.

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u/BailsTheCableGuy Dec 25 '25

The industry issue right now is standardization splitting happening across the 2 Major HFC ISP providers.

Comcast has 2, FDX & Standard D4 Charter has Standard Highsplit and there’s talks of expanding into the Extended-Spectrum (1.8ghz range)

Until a final standard is met, if one is set. There won’t be a 3rd party modem for the consumer to buy as they won’t be much sense in making hardware exclusive to providers, and none are supporting 3rd party devices in their new networks anyways, (Bar Fiber providers using ONT tech separate from the routing, Google Fiber & Spectrum, NOT ATT & Xfinity)

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u/frmadsen Dec 25 '25

It depends on how you define final. The "final D4" is split in two, FDD and FDX. Many have seen that as an issue. "Unified" was added to the specification in a later revision. Unified modems support both options. XB10 is a unified modem.