Just wondering if the DOCSIS 3.1 OFDM is actually used if you do not have gigabit service. On a Comcast forum thread, I said it should be, but somebody said he had been told it's only used for gig speed. Anyone have a definitive answer?
https://forums.xfinity.com/t5/Your-Home-Network/Docsis-3-1/m-p/3414493
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[Connectivity] Is OFDM used even if you have sub-gig package?
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[Rant] Comcast Horrible Backup Power/Connectivity
It appears during the Texas rotating outages comcast cannot keep their infrastructure up. This is insane, battery backups seemed to last about 5 hours... pathetic. How are they meeting FCC mandate for telephony? The fact that grid power outages took down the system is disturbing and frankly unacceptable in a hurricane prone region. This is in an area without line damage or other infrastructure harm caused by the weather. Just flat power outages with zero reliability, once we rotated back onto the grid, the internet magically came back. We have a genset so we stayed up
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[Equip] Need help with new router suggestions. Old one died
I need help choosing a new router. Needs to be wifi 6 compatible, work with older 2.4ghz stuff, yes I know I still have older 2.4 stuff but lots of wifi 6 stuff to. Needs to be able to handle the gigabit internet I have and multiple people using it at the same time . Was thinking of asus just not sure how they are and how it'll work with all the clients plus gaming , low latency would be nice too. Thanks for suggestions
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[NEWS] Extreme Pro 600 speed increase to Extreme Pro 800 in March.
Customers who subscribe to Extreme Pro will get a boost from 600 Mbps to 800 Mbps sometime before March 31.
So 800mbps plan with 21% overhead will be 968mbps which maxes out Gigabit ethernet.
Also mentions gigabit speed increase to 1.2gbps like Northeast.
https://www.wifr.com/2021/02/03/comcast-increasing-internet-speeds-in-rockford-region/
https://www.sun-sentinel.com/business/fl-bz-comcast-speed-boost-20210204-taz5cufibnflfdsbovfcajn7ye-story.html
https://chicago.comcast.com/2021/02/02/comcast-introduces-the-fastest-internet-speeds-over-wi-fi-across-the-region/
https://www.timesfreepress.com/news/business/aroundregion/story/2021/feb/04/comcast-boosts-internet-speeds-offers-fastest/541014/
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Firmware Update Change Modem Login?
I’ve been using my browsers feature to remember my login information to login to my SB8200. But suddenly it’s saying my credentials are invalid.
I’m using admin and the last 8 digits on the SN. Anyone else experience this? Was there a recently firmware push?
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[Caps] Comcast Postpones Northeast Data Caps until 2022?
Sorry if this is old news, but I didn't see anything posting. Checking my data usage under 'Devices' on my account page and I noticed there was no longer a reference to the 1.2 TB limit. There was also a new message:
Xfinity Internet Data Plan: We are delaying implementation of our data plan in our Northeast markets until 2022. We recognize that our data plans were new for our customers in the Northeast, and while only a very small percentage of customers would be affected by the plan, we are providing them with more time to become familiar with their data usage
Sounds like July 2021 is now Jan 2022 (or later?)
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[Price] Retention deals for areas with new fiber competition
My in-laws are off-promo with their Xfinity Internet service, but their neighborhood is starting to get fiber service rolled out by a competitor. Was planning to talk to Xfinity's loyalty department, bringing up the new fiber alternatives and see if they'd offer a lower rate if we threaten to cancel. Has anyone tried that lately with any success? It sounds like Xfinity's loyalty reps can't offer 'save' discounts anymore, but wanted to check before going down that road.
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[Equip] XB7 Technicolor CGM4331COM/Arris TG4482 - Wireless AX(Wi-Fi 6)
Looks like a new xfinity gateway passed through testing. No idea if it's going to be called the XB6 still, probably XB7 or something. Model number seems to be CGM4331COM. The test report mentions that it has 802.11ax. Looks like this unit may only have 4 antennas(4x4 AX on both bands). The current XB6 are a 2x2 N 2.4 GHz + 8x8 AC 5 GHz design(I believe it has a total of 12 antennas as a result).
See -
https://fcc.io/G95/4331X
Submitted shortly before it, are two other Technicolor devices called the XHR1-TC and the XHU1-TC. The XHU1-TC might be something like the current XB6 power supply, but upgraded? Its description is listed as "LTE power supply." The XHR1-TC is listed as a Zigbee repeater.
No idea if this will have a fan, but the label does say 12V/4.6A, so 55.2 watts, so I guess it will. The original Technicolor XB6(CGM4140COM) had a 60 watt power supply.
Edit: Changed title to reflect XB7
Edit2: Title updated again to mention Arris version if it arrives.
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XB6 in Bridge Mode
Hi,
I currently use an MB7621 for my cable modem. I have switched out XFinity TV for AT&T TV streaming - which will require a switch to unlimited data. Now, I could add this to my current plan for 30 - or switch to a Comcast-owned modem for 25.
I've had bad experiences in the past with Comcast-owned modems in bridge mode - they used to have a nasty habit of popping out of bridge mode on occasion, hosing everything up.
So, my question: If you use an XB6 in Bridge mode, how is it? Does it honestly disable all the wifi (even hidden APs?) Wireless environment in my building is super-congested. Does it retain the setting, or will I have to call in every 6 months to re-set it?
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[Speed] Comcast Upload Update?
Alright, so I remember that roughly one year ago, Comcast stated that increased upload speeds were coming in "2017." (https://www.dslreports.com/shownews/Comcast-Promises-Faster-Upstream-Speeds-Next-Year-137992)
I personally don't care if this increase comes in the form of DOCSIS 3.1, Full Duplex DOCSIS 3.1 (which is still undergoing spec to my knowledge - so I expect this is not the most immediate solution), mid, or high split.
Has anyone seen updates on these phantom upload speed increases?
Some more sources:
http://www.lightreading.com/cable/docsis/comcast-hints-strongly-at-upstream-mid-split/d/d-id/715771 (Ha! This was over two years ago! Riiight...)
http://www.multichannel.com/news/distribution/comcast-eyes-upstream-expansion-it-pulls-fiber-deeper/411718
https://www.dslreports.com/shownews/Comcast-Symmetrical-Cable-Broadband-Coming-in-Next-24-Months-139090
I know the year is not over yet, and it's not like Comcast actually follows through with their time schedules, but it seems like a lot of "upload-to-the-press" to me. Just seeing if anyone has heard something new that I haven't.
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[Connectivity] How are my modem connection stats?
Hi everyone!
Intro
I live in Connecticut and sub for Performance Pro (300/12mbps).
I've had on-again off-again issues with Comcast over the years. After my latest spat with them, I got a 3rd level technician to stop by. Another tech had padded the termination from the pole to my property due to "interference coming from the property." This was taken care of and restored (padding removed).
Something the technician said that triggered alarms for me, along the lines of: "Wow these signals from the amp are screaming, and the signals at the junction are way out of whack, as well as down the street." He put in a work order for the amp, and a tech was working on that the same day.
I've always had high power levels which I attributed to living close to the amp. But I've also had error logs full of T3 timeouts and other errors.
Setup/Configuration
- From the amp to the junction in front of the house is about 50'. From the junction to the house is about 75'.
- The feed from the junction leads to a 2-way splitter with -3.5dB on the legs. One path feeds the cable TVs in the home, and the other leg leads straight to a -6dB FPA directly on the modem (Netgear CM150V)--RG6 btw. The FPA is needed as without any attenuator my power levels exceed +10dB and problems occur. Without an attenuator my upstream power levels are already +42dB.
- From the modem is a straight path to my router (ASUS RT-AC86U).
[att=1]
Modem Stats / Event Log
I'm paranoid, so do things look normal? Does anything seem out of whack? Is there anything I should nag Comcast about? I can post an updated image later as uncorrectables pop up, but with the FPA that doesn't appear to be an issue anymore. I do not know my uSNR, upstream receive power, or IFCR yet.
[att=2]
Fri Feb 19 14:32:50 2021 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 14:32:42 2021 Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 14:32:33 2021 Notice (6) TLV-11 - unrecognized OID;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 14:30:15 2021 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 14:29:44 2021 Warning (5) MDD message timeout;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 14:29:43 2021 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 13:50:25 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 08:30:35 2021 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 13 34; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 08:30:34 2021 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 34; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
Fri Feb 19 08:02:15 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:d3:b7:88;CMTS-MAC=28:52:61:29:69:cd;CM-QOS=1.1;CM-VER=3.1;
PS: Does anyone know where I can get a -3dB FPA, and -8dB/-10dB FPA? I can only find these in packs for $50, but I only need one each. Thank you for any and all help!!!
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Downstream SNR
My down stream snr is around 42-43. My upload power is the same. Are they acceptable? The reason I ask is a lot stuff that's written about it doesn't really mention it that high.
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If you can get Verizon Fios, why do you stay with Comcast?
Just curious
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Comcast installed coax with electrical lines causing major issue
3 years ago or so i had humming sound sub-woofer found coming from coax line it ground loop. Comcast said come back install rod...never did so i bought isolator as fix.
Now im having weird issues computer so upgraded thinking was issue part...nope i got sick troubleshooting build whole new computer as time upgrade anyways. Still picking up interference. I took into another apartment and same thing. I took to work and fine.
Something interfering with my PC and feel in the computer and causing my mouse it get floaty lag almost like acceleration but not that and worst under load because fans and light inside prone interference.
Anyways had electrician in didn't find nothing but didn't really look. Randomly decided to disconnect Comcast again and what shock goes away instantly. But slowly creeps back Problem its coax in wall touching electrical lines....We have 3 floors here and even with it disconnected lines in wall downstairs upstairs sending it to my electrical wires and passing right though my electrical outlet. And how figure this out was shut breaker off for outlets at coax and they still test current from outlet. And if i touch coax to ground it goes away. Mind you also im detecting EMF on my TV on wall and soundbar not even plugged in It radiating through my wall!! Even if i TOUCH THE WALL near electrical line it stops that how bad is keep in mind this is with no power being fed to those outlets my breaker is off it being fed definitely from upstairs anything they do i can feel it in computer. Sometime better and most time worst.
Also cant use wifi it just adds to issue when i fix problem temporarily by moving coax lines in wall just right but always touching somewhere even close proximity just takes longer to build up and effect computer.
I see alot off same problem and no one seem fix other than one guy who moved out. How much wanna bet these all same problem
https://www.reddit.com/r/buildapc/comments/bafhfe/update_after_years_of_mouse_input_lag_and_other/
https://forums.blurbusters.com/viewtopic.php?t=6498
https://www.reddit.com/r/ElectroBOOM/comments/j79say/electricity_causing_input_lag/
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Can the Xfinity XB7 CGM4331COM TG4482A be used in Bridge mode?
I am Considering upgrading to the XB7 , being as I just upgraded to a Wifi 6
ASUS RT-AX88U router.
Is there anyone currently using a XB7 router in bridge mode? , or do we know if Comcast removed this ability with this new model?
Thanks in advance...
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Upgrade to gigabit to improve latency?
I currently have the 600 mbps package and I would like to improve my latency. I read somewhere on xfinitys website that the gigabit package has lower latencies. Maybe because less people get it? I was also thinking of upgrading my hardware. Currently Orbi RBK50 and Motorola MB 7621.
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[NodePlus0] General Discussion of N+0 deployment activity
I would like to start a thread where we can keep track of the areas where Comcast has started deploying N+0 equipment. Earlier this year Comcast started pushing fiber deeper into the neighborhoods around me but close to 10 months after it was strung/buried it is still sitting unspliced and unlit. The comcast plant in my area is an old Adelphia region that is built on a 750MHz architecture so it's due for upgrade but it appears as if comcast is stalling on these upgrades for some reason. Has anyone else noticed any aggressive node splits and/or amplifier reduction in any other markets?
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sb8200 firmware
booted up my sb8200 for giggles, and i noticed the firmware updated on it. i have no idea how to search this forum to see if someone has mentioned it yet.
AB01.02.053.01_112320_193.0A.NSH
in spectrum analyzer it has a link to UDA spectrum analyzer, and it zooms in between 90 mhz and 105 mhz, like the oob zone for mid split, whats this all about? to see if anything around you is causing interference?
then when you are on uda, theres a link to speca, and speca shows you the entire specturm, also noticing on here its actually showing some activity on the upstream, no idea what thats all about because when zooming in, it doesnt show the 5 channels very clearly
[att=1]
[att=2]
[att=3]
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[Equip] XB7 Technicolor CGM4331COM/Arris TG4482 - Wireless AX(Wi-Fi 6)
Looks like a new xfinity gateway passed through testing. No idea if it's going to be called the XB6 still, probably XB7 or something. Model number seems to be CGM4331COM. The test report mentions that it has 802.11ax. Looks like this unit may only have 4 antennas(4x4 AX on both bands). The current XB6 are a 2x2 N 2.4 GHz + 8x8 AC 5 GHz design(I believe it has a total of 12 antennas as a result).
See -
https://fcc.io/G95/4331X
Submitted shortly before it, are two other Technicolor devices called the XHR1-TC and the XHU1-TC. The XHU1-TC might be something like the current XB6 power supply, but upgraded? Its description is listed as "LTE power supply." The XHR1-TC is listed as a Zigbee repeater.
No idea if this will have a fan, but the label does say 12V/4.6A, so 55.2 watts, so I guess it will. The original Technicolor XB6(CGM4140COM) had a 60 watt power supply.
Edit: Changed title to reflect XB7
Edit2: Title updated again to mention Arris version if it arrives.
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Extreme Pro Questions
I have read what is available here on the forum and searched on Xfinity for some answers buy cannot seem to find what I am looking for. I am in Vermont and am currently on Blast which here is 300/10. My questions.. has anyone seen a speed increase to 400 from the 300 in Vermont or in the Northeast because I heard there was going to be a bump to 400? Secondly, the next tier for me would be Extreme Pro. I cannot seem to find what the up/down for that tier are but surmise it would be 600/20 or there about. Before I signup for the Extreme Pro, curious to see if anyone has been bumped to 400. Thanks for the replies.
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