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Thread: Cable modems with Intel's Puma 6 chip set problem

  1. #1

    Cable modems with Intel's Puma 6 chip set problem

    These links are to DSLreports information regarding Intel's problem with there Puma 6 chip set seen in various Mfr cable modems:
    Initial:
    https://www.dslreports.com/forum/r31...Linear-mistake and
    https://www.dslreports.com/forum/r31...sue-Discussion and https://www.dslreports.com/forum/r31...-ready-to-test

    Recent problem found: 4/25/2017
    https://www.dslreports.com/forum/r31377755-

    Most cable modems with Intel's Puma 6 chip sets are effected. Users may want to contact there modem Mfrs if they are having problems with effected modems.

  2. #2
    Advanced Member chpalmer's Avatar
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    It's deplorable that company's are still churning these out and actually building new products based on this chipset..

    http://badmodems.com
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  3. #3
    Thanks for adding that...Glad it's getting more visibility.

    Quote Originally Posted by chpalmer View Post
    It's deplorable that company's are still churning these out and actually building new products based on this chipset..

    http://badmodems.com

  4. #4

  5. #5
    Administrator Philip's Avatar
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    That's a great price for that modem.. (just note that it is refurbished)

    Seems Comcast has now removed the SB6141 and SB6183 from their "compatible devices" list, at least in my area :/ I am still using a SB6141 though, and it's been working great.

  6. #6
    Found this on one site regarding Comcast: [link removed by admin]
    "End Of Life Modems – ARRIS SB6141? Netgear CM400?

    People are concerned that the (164) Arris or Netgear modems will be end of lifed. These are solid long term DOCSIS 3.0 modems. They are much newer technologies and have enough download channels to sustain all current cable networks and the next waves. However, older (84) modems with only 8 down channels such as the SB6141 or CM400, are starting to be removed from the internal supported devices list. According to several of our readers statements, those modems are no longer on the approved list for Xfinity.
    As for the (164) DOCSIS 3.0 modems, even if they were added to an end of life list in 8 years, they would continue to work if the mac address was already added to your internet account. You just would not be able to activate it on a new account."

    Ya I presume the 8x4s and 16x4s are going to be weeded out as DOCSIS 3.1 comes into play.


    Quote Originally Posted by Philip View Post
    That's a great price for that modem.. (just note that it is refurbished)

    Seems Comcast has now removed the SB6141 and SB6183 from their "compatible devices" list, at least in my area :/ I am still using a SB6141 though, and it's been working great.

  7. #7
    Administrator Philip's Avatar
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    I use Comcast, just checked the Xfinity device compatibility list ( https://mydeviceinfo.xfinity.com/ ) and SB6183 is no longer in the "recommended" list. It is still in the "compatible" list if you search by model number, the only way to find it. I imagine they are just looking ahead into a DOCSIS 3.1 network in a few years, hence not recommending DOCSIS 3.0 modems anymore. I imagine it will be many years before they stop supporting them though, you are right.

  8. #8
    Ya, I presume over time, some modems will fall off. I presume quicker on the major ISPs as they are pushing for faster speeds. On my ISP the SB 6121 and 6120 are supported however not recommended unless you are using there lowest speed tier. The SB 6183 and MB 7420 are supported still.

  9. #9
    Advanced Member chpalmer's Avatar
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    Im loving my new Motorola MB8600 now that my ISP has their act together. The Arris SB8200 also a good choice is based on the same chipset but runs a tad warmer under normal operation. Heads up for anyone looking for a backwards compatible D3.1 solution.
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  10. #10
    I'm liking the MB 7420 16x4. Nice alternative as well if ones ISP supports it.

  11. #11
    Second Most EVIL YARDofSTUF's Avatar
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    I still have the SB6121. Gotten plenty of calls from Comcast telling me to upgrade to maximize my service, but it handles the 30mbps down and 5mbps up just fine. Certainly not paying 200 bucks to get a new modem that supports crap I don't make use of. That is until they make this one not work.

  12. #12
    The SB 6121 is certainly a good modem. Until your ISP stops supporting it on there system and makes you move to a newer generation, keep it. I have the 6121 and it worked well when I had it online. Modems are not spendy, I got my SB6183 and Motorola MB7420 for under $80. You can find good deals on Amazon and such. If your paying for a modem thats $200 then your not looking around finding better deals.

    Quote Originally Posted by YARDofSTUF View Post
    I still have the SB6121. Gotten plenty of calls from Comcast telling me to upgrade to maximize my service, but it handles the 30mbps down and 5mbps up just fine. Certainly not paying 200 bucks to get a new modem that supports crap I don't make use of. That is until they make this one not work.

  13. #13
    Second Most EVIL YARDofSTUF's Avatar
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    Well the 200 bucks was in reference to the recommended model by comcast, the SB 8200. Overkill for the basic connection.

  14. #14
    And you don't have to use the 8200, I'm sure there are other modems that are on there supported modems list that you can use. SB6183, MB7420, etc.

    Quote Originally Posted by YARDofSTUF View Post
    Well the 200 bucks was in reference to the recommended model by comcast, the SB 8200. Overkill for the basic connection.

  15. #15
    Second Most EVIL YARDofSTUF's Avatar
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    SB8200 or SB6190, motorola MB8600, Netgear CM1000, or some linksys router modem combo. I'm aware I dont have to use the 8200, but its the main one they recommend and I think thats ridiculous.

    Honestly all the recommended ones are kinda crazy considering the 6121 still work just fine for most of their tiers.

  16. #16
    Administrator Philip's Avatar
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    Newer modems have a slight advantage of better hardware/newer chipsets and more redundant bonded channels.. That would only play a role in congested nodes that slow down at peak times, or with higher tiers though. In general you wouldn't see much difference.

  17. #17
    They only recommend it as they are eventually trying to get everyone on to newer stuff and better channel handling. If they still support the 6121, then I wouldn't worry about it. Eventually however they can and will stop supporting it. Then you'll need to find the next step up modem to get. I presume any 16x4 channel modem will work that they support. Users don't have to have or use the latest and greatest.

  18. #18
    Update: 8/29/2017
    [link removed by admin]

    ARRIS is receiving firmware releases for the Puma 6 chipset from Intel. As Intel provides these releases, they immediately undergo rigorous testing for the ARRIS devices. Because different versions of the update are required to address multiple operators’ configurations, we are passing the individual releases on to operators as soon as they complete ARRIS testing. Field deployment timing depends on the operator’s determination after their own testing and qualification.

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