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Internet Outage: Arris CM550B Modem & Pentagram Cerberus P6360 Router - Multimedia Connection

szpadelxd 46890 11
Best answers LABEL_AI_GENERATED

Why does my Arris CM550B modem lose sync and the Online LED go out, and what should I check when the TV service still works?

If the Arris CM550B cannot synchronize the DS/US signal and the Online LED goes out, the problem is either the signal reaching the modem or the modem itself, so it should be reported to Multimedia support/hotline [#15255394][#15255391] Blinking DS and US LEDs mean the modem is out of sync with the network [#15253429] Check the apartment cabling step by step, including F plugs, splitters, and all connections from the cable entry point to the modem [#15253429][#15253532] Disconnecting the router does not change the symptom, so the router is not the cause [#15253522] Since the TV works, the provider’s service is still present, but the modem is not getting a usable data signal or the modem may be faulty [#15254947][#15255394]
AI summary based on the discussion. May contain errors.
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  • #1 15253420
    szpadelxd
    Level 12  
    Posts: 108
    Rate: 9
    Hello. I haven't been using the Internet for 3 days. After the modem has been reset (Arris CM550B) 4 LEDs are on: Power, ds, us and online blinking. After a while the diona online goes out. I have paid for the Internet from Multimedia, it stopped working suddenly when the computer was turned off. I have a Pentagram Cerberus P6360 router connected to it. I would like to ask for your help, thank you in advance
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  • Blinking DS/US LEDs indicate modem network synchronization loss

    #2 15253429
    jakubwaba
    Level 22  
    Posts: 355
    Help: 58
    Rate: 105
    If the DS and US LEDs are blinking, it means that the modem is out of sync with the network - the problem may be in the cable installation in the apartment (check F plugs, splitters, etc.) and if that does not help, report it to the Internet provider (it may be a problem on the building's network) ), you can also ask neighbors who also have Internet from Multimedia if they are working properly.
  • #3 15253434
    Robert 1960

    Level 32  
    Posts: 2454
    Help: 238
    Rate: 408
    Hello !
    After all, you also have technical support from MM, if you do not want to use it, disconnect the router at the beginning and see what happens!
    Company Account:
    P.U.T. DOMSAT
    Ignacego Rzeckiego 4/39, Lublin, 20-637 | Tel.: 697XXXXXX (Show)
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  • #4 15253522
    szpadelxd
    Level 12  
    Posts: 108
    Rate: 9
    After disconnecting the router, the same thing.
    jakubwaba cables okay.
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  • #5 15253532
    Robert 1960

    Level 32  
    Posts: 2454
    Help: 238
    Rate: 408
    Check the installation in the house, step by step from the cable entry into the apartment to the modem and check the connections!
    Company Account:
    P.U.T. DOMSAT
    Ignacego Rzeckiego 4/39, Lublin, 20-637 | Tel.: 697XXXXXX (Show)
  • #6 15253554
    szpadelxd
    Level 12  
    Posts: 108
    Rate: 9
    All cables and connections are fine.
  • #7 15253561
    Robert 1960

    Level 32  
    Posts: 2454
    Help: 238
    Rate: 408
    Just report it to MM, as far as I know these modems are terribly flawed!
    Company Account:
    P.U.T. DOMSAT
    Ignacego Rzeckiego 4/39, Lublin, 20-637 | Tel.: 697XXXXXX (Show)
  • #8 15253687
    jakubwaba
    Level 22  
    Posts: 355
    Help: 58
    Rate: 105
    And does my colleague, author, apart from the Internet in Multimedia, also have digital TV? If so, is the TV working properly?
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  • #9 15254947
    szpadelxd
    Level 12  
    Posts: 108
    Rate: 9
    Yes, we also have TV, it works.
  • Helpful post
    #10 15255391
    Robert 1960

    Level 32  
    Posts: 2454
    Help: 238
    Rate: 408
    As I wrote earlier - these modems are faulty, contact the MM hotline!
    Company Account:
    P.U.T. DOMSAT
    Ignacego Rzeckiego 4/39, Lublin, 20-637 | Tel.: 697XXXXXX (Show)
  • Helpful post
    #11 15255394
    jakubwaba
    Level 22  
    Posts: 355
    Help: 58
    Rate: 105
    If the digital TV works and the modem does not want to synchronize even the downstream, then either the problem is with the signal coming to the modem or with the modem itself. It remains to report this problem to the service provider.
  • #12 15255796
    szpadelxd
    Level 12  
    Posts: 108
    Rate: 9
    Okey thank you.
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Topic summary

LABEL_AI_GENERATED
The user is experiencing an internet outage for three days with an Arris CM550B modem, indicated by blinking DS, US, and online LEDs, while the online LED eventually turns off. After resetting the modem and disconnecting the Pentagram Cerberus P6360 router, the issue persists. Responses suggest checking the cable installation, including F plugs and splitters, and contacting the internet provider, Multimedia, as the modem may be faulty or out of sync with the network. The user confirms that digital TV services are functioning properly, indicating the issue is likely isolated to the modem or its connection.
AI summary based on the discussion. May contain errors.
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