Visitor

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2 Messages

Wednesday, June 24th, 2026 6:13 PM

XB8 stuck on sub-split upstream -- no mid-split, upload capped at 35 Mbps

My XB8 (CGM4981COM) is ranging only on subsplit upstream channels (10–40 MHz), with no midsplit and no OFDMA upstream, so my upload is capped at ~35 Mbps despite a 1.2 Gig plan. Please check whether midsplit is live on my node, and if so push the enhancedupload bootfile and reprovision my upstream. If frontline can't, please open an engineering ticket.

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Visitor

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2 Messages

11 hours ago

Following up — still seeing sub‑split‑only upstream, no OFDMA; can someone from Xfinity Support take a look?

Contributor

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20 Messages

9 hours ago

Hi im having the same problem neighbor has lower speed plan there getting over 100mb upload im stuck at around 40mb upload on Gigabit extra we both have a xb8 gateway? My signals levels are even better to then there's we both have ofdm on both download and upload signals. so must be the configuration boot file ? Reason im not getting mid or high split speed we both are wired direct to street no splitters at all.

What should i do to fix mine can you send a update ?

(edited)

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