I started out with 50 Mbps and an Arris SB6141 cable modem. It would do the advertised speed. Then TWC upgraded everyone to 60 Mbps for free. The speed was as advertsed. Now Spectrum has upgraded (not free) everyone to 100 Mbps, and it not going much faster. It was between 60 and 80 Mbps - usually 65 Mbps. So I decided to take advantage of a coupon on Amazon and bought the Arris SB8200. It's DOCIS 3.1 with 32 down and 8 up channels. It's claimed to be capable of gigabit speeds. However, I'm getting a very steady 66 to 70 Mbps with 24 up channels and 4 down channels in use, I have all gigabit hardware and cables. When I copy files over the network, I have seen several hundred MB/sec through my router. Any ideas would be welcome.
Heres my SB8200 status dump:
The status listed show the connection state of the cable modem. They are used by your service provider to evaluate the operation of the cable modem.
|Acquire Downstream Channel||567000000 Hz||Locked|
|DOCSIS Network Access Enabled||Allowed|
|Channel ID||Lock Status||Modulation||Frequency||Power||SNR/MER||Corrected||Uncorrectables|
|9||Locked||QAM256||567000000 Hz||6.7 dBmV||42.1 dB||0||0|
|10||Locked||QAM256||573000000 Hz||6.5 dBmV||41.8 dB||0||0|
|11||Locked||QAM256||579000000 Hz||6.1 dBmV||41.6 dB||0||0|
|12||Locked||QAM256||585000000 Hz||5.6 dBmV||41.4 dB||0||0|
|13||Locked||QAM256||591000000 Hz||5.0 dBmV||41.1 dB||0||0|
|14||Locked||QAM256||597000000 Hz||4.4 dBmV||40.8 dB||0||0|
|15||Locked||QAM256||603000000 Hz||4.7 dBmV||40.8 dB||0||0|
|16||Locked||QAM256||609000000 Hz||5.4 dBmV||41.2 dB||0||0|
|17||Locked||QAM256||615000000 Hz||6.2 dBmV||41.6 dB||0||0|
|18||Locked||QAM256||621000000 Hz||7.2 dBmV||42.2 dB||0||0|
|19||Locked||QAM256||627000000 Hz||7.8 dBmV||42.4 dB||0||0|
|20||Locked||QAM256||633000000 Hz||8.2 dBmV||42.6 dB||0||0|
|21||Locked||QAM256||639000000 Hz||7.8 dBmV||42.4 dB||0||0|
|22||Locked||QAM256||645000000 Hz||8.1 dBmV||42.6 dB||0||0|
|23||Locked||QAM256||651000000 Hz||8.0 dBmV||42.5 dB||0||0|
|24||Locked||QAM256||657000000 Hz||8.2 dBmV||42.6 dB||0||0|
|25||Locked||QAM256||663000000 Hz||8.2 dBmV||42.5 dB||0||0|
|26||Locked||QAM256||669000000 Hz||8.1 dBmV||42.5 dB||0||0|
|27||Locked||QAM256||675000000 Hz||8.2 dBmV||42.2 dB||0||0|
|28||Locked||QAM256||681000000 Hz||7.8 dBmV||42.3 dB||0||0|
|29||Locked||QAM256||687000000 Hz||7.9 dBmV||42.1 dB||0||0|
|30||Locked||QAM256||693000000 Hz||8.1 dBmV||42.4 dB||0||0|
|31||Locked||QAM256||699000000 Hz||8.3 dBmV||42.5 dB||0||0|
|32||Locked||QAM256||705000000 Hz||8.3 dBmV||42.5 dB||0||0|
|1||Not Locked||Other||0 Hz||0.0 dBmV||39.8 dB||15||0|
|Channel||Channel ID||Lock Status||US Channel Type||Frequency||Width||Power|
|1||84||Locked||SC-QAM||37000000 Hz||6400000 Hz||43.6 dBmV|
|2||81||Locked||SC-QAM||17800000 Hz||6400000 Hz||41.4 dBmV|
|3||82||Locked||SC-QAM||24200000 Hz||6400000 Hz||42.1 dBmV|
|4||83||Locked||SC-QAM||30600000 Hz||6400000 Hz||43.4 dBmV|
Current System Time: Mon Mar 12 14:57:28 2018
I do have adaptive QoS set. I just tried it on and off, and find the results interesting. With adaptive QoS on, I just got a solid 80 Mbps, and with it off, I got 68 Mbps. Not what I expected.
Sorry but that modem isn't supported by Spectrum yet.... You're lucky it works at all. ...
Your 6141 should have done 100/10 just fine.
Did you reset the router to factory default then autodetect wan settings?
This is part of the issue and why it is not on the list:
|1||Not Locked||Other||0 Hz||0.0 dBmV||39.8 dB||15|
That's the ODFM channel for docsis3.1 use. It will take TWC/ Spectrum specific firmware and who knows when if ever they will pay to have it written. Right now they have major infrastructure issues with the 1 gig service due to the junk TWC sold them and it doesn't work well on the modem they provide in many areas.
My SB6141 did not work just fine at 100/10 as it should have. This new SB8200 works a bit better - a little faster and much more steady. By steady I mean much more consistant speed. It is also interesting that the front panel of the SB8200 reports that DOCSIS 3.1 is engaged (at least the blue light is on which is supposed to mean that). It is obvious that the hardware sitting in the former TWC building a few miles from here may not be up to the marketing ambitions of Spectrum.
In my research of cable modems I came across a number of people who have the SB8200 working somewhat OK with Spectrum in various parts of the USA. One of the marketing claims for the SB8200 is that it is compatible with DOCSIS 3.0 systems (at least on paper). Since it is working a bit better than my original cable modem, I'll keep it. Besides, how could I have said no to that Amazon coupon?
If you couldn't make 100/10 with a 6141, you should of complained then rather than expecting a new modem to fix coaxial and overloaded nodes... Especially if either was lower than 80%... they are overprovisioned for around 115/12.
If in NYS, contact your state atty gen... lotsa complaints there
BTW, the led's will not indicate anything correctly since it's a non approved modem... All the LED's are programable and that modem does not have spectrum firmware in it, don't blame anything on them until they announce that as an approved modem. Good luck with any service calls until they do.
That odfm ch in the last slot should have a frequency and power level/ s/n listed, it shows correcteds indicating it has issues and probably slowing the normal docsis 3 channels down.