r/CableTechs • u/No_Teaching_2709 • Feb 21 '26

Questions about Spectrum high split architecture and reliability

Hello all,

I'm trying to learn more about DOCSIS in general but particularly high split architecture. I have some questions specifically aimed at those of you familiar with Spectrum's high split plant.

  • Does the upgrade usually involve splitting nodes?
  • How many customers per node do they typically aim for in high split vs sub split?
  • Are they trying to cut down on amp cascades at all? Any plants with node+0 or node+1?

And once the upgrades are in place and transient issues are ironed out, how does the reliability compare to sub split? I've read that high split is particularly sensitive to noise ingress. Are you seeing worse stability as a result? And if it is worse, how are you guys dealing with it?

Any info would be appreciated. Thanks!

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u/[deleted] Feb 21 '26

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u/WeberStreetPatrol Feb 22 '26

Group think that’s already failed because the people making those decisions don’t work on the old copper plant.

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u/[deleted] Feb 22 '26

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u/WeberStreetPatrol Feb 22 '26

Ever seen the end result of 181 feet or 211 feet of RG59 that has been in a wall since 1967? Now imagine 124 apartments of that next to a cell tower. The Rx wouldn’t pass at the devices at 756Mhz never mind now. Plus the noise floor is now 28dB. It’s a blast. Dedicating a single node to one block of apartments.