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joed0819's avatar
joed0819
Aspirant
Jan 01, 2021

Nighthawk CM1200 Modem installed and now Sonos is not working

I have recently upgraded to a nighthawk CM1200 modem.  My sonos systems keeps telling me that my phone is not on the same network as my sonos system.  I have tried all the troubleshooting steps suggested on the app with zero success.  I have moved and plugged in one of the speakers (a 2nd generation play 5) locally at the modem.  The speaker still is not recognized as being on the system.  I also tried do the same with a 1st generation play 5 speaker connecting locally with the modem and speaker with the same unsuccessful results. Is there a way to change the network name and password within the sonos app?   Are there any additional steps I can try to get the sonos system and iphones, ipads and imac all on the same network?
I am operating on iphones, ipads and an imac.  
 
Any help would be appreciated.

 

3 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Jan 01, 2021

    What is the MFr and model# of the wifi router you have connected to the CM series modem? 
    You'll need to make sure your devices are connected to the wifi router. 

  • plemans's avatar
    plemans
    Guru - Experienced User
    Jan 02, 2021

    You put you have plugged the sonos into the modem. 

    The CM1200 has 4x ethernet ports but for the average user, only 1 device can be connected to it. Reason why is the majority of isp's (not all) only allow 1 public ip address. And that goes for the router. 

    The exceptions to this is the rare isp that does allow more than 1 public ip address, those with a business class line, and those who pay their ISP for more than 1 public ip address. 

     

    So make sure you're going: 

    CM1200------>google router/mesh----->sonos device/devices. 

     

    They (sonos) shouldn't connect directly to the modem.