Quote:
Originally Posted by jalzoo
My latency is higher on the SH2 compared to the SH1, My Mini-Slot Size has changed from 128 to 4 on my upstream. after looking around on the virginmedia forums someone spoke to an engineer about it and they said: "the reason the pings were high was due to the mini slot size being 4 and said soon enough a firmware update should sort this". knew i shouldn't have changed something that wasn't broken.
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Basically, the "engineer" was talking utter gollox.
The SH1 which uses the Broadcomm DOCSIS chipset reports the upstream minislot size as the number of symbols per minislot. At 16QAM, that's 4 bits per symbol so Minislot size of 128 = 64 Bytes.
The Puma 5 DOCSIS chipset (which was also used in the old VMNG300) reports the Minislot size as the number of upstream clock ticks each 6.25 Useconds wide.
So into a Minislot of 4 ticks is packed 64 Bytes.
Does that make sense?