I

Visitor

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2 Messages

Thu, Jul 29, 2021 11:45 AM

CGM4140COM Ethernet port speed slower than WIFI

I have a CGM4140COM modem/router and I am trying to setup a point to point for a new building.  I am experiencing the internet signal dropping out.  After some investigation it appears that I am only getting <100mbps out of the Ethernet ports.  I am paying for 800mbps getting about 500mbps on WIFI.  After reading some on this forum, I see that some ports do not have gigibit capability to support higher speeds.  However, this modem/router is supposed to be gigibit capable.  So what is limiting the speed?

I am using CAT6 cables and yes swapped them to check cables.  I cannot get more than 90mbps.  I am at a loss as to what the next steps are.  I would go buy a new modem/router if I thought that was the solution but I am leery to do so without some guidance that that resolves this issue.

Responses

XfinityAbbie

Official Employee

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477 Messages

2 m ago

Hello, and thank you for taking the time to reach out to us here on Xfinity Community Forums! I am sorry to hear you are having issues with connection and speed. I am not seeing that your modem is listed as a supported device for us. You can see a list of devices we support here:  https://comca.st/3BZmLeK

Visitor

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2 Messages

2 m ago

Well it came directly from Comcast. It may be called an XB6T as well.

XfinityAbbie

Official Employee

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477 Messages

Oh my apologies, I should know the exact model number of our equipment, I assumed it was a modem you purchased. Sorry about that! But yes, you are correct and the XB6 is definitely supported for the speeds you mentioned. I have the same modem and speeds in my home. What I would like to do is get your account pulled up and make sure all the signals look good. 

 

Please send a private message by clicking the Peer to Peer chat icon in the upper right corner of the page, click on the pen and paper icon, then enter “Xfinity Support” in the “To” section. Please include your name and address and I'll be happy to help. 

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EG

Expert

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89.2K Messages

2 m ago

Does the device / computer that you are using to test the speeds have a 10/100/1000 (gigabit) ethernet adapter ?

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