Compare WiFi speeds of rented XB3 DPC3941T cable modem/router combo to the newer AC1900 models.

I am getting ready to start streaming and I need a fast reliable WiFi. I currently have the rented XB3 DPC3941T cable modem/router combo because I love the home phone option. I am not too tech-savvy but I realize that most people are telling me I need at least AC1900 specs. I also realize that this combo is several years old and it probably doesn't meet or exceed these specs. I have searched for specs that made sense or at least addressed similar specifications, but all I get is a handful of Greek figures and empty promises telling me it is capable of speeds in excess of 700mps (and we all know this doesn't happen).

Do you know how the AC1900 protocol speeds compare to this model?
If it is significantly faster and since I want to keep the home phone service (so I need a modem with this feature), can I simply use one of the ethernet wired plugs and connect it to an external WiFi router to bump my speeds? bottom tag _redacted version.jpg

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Accepted Solution

EG

Expert

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110K Messages

5 years ago

@danthetvman wrote:

This link wouldn't open for me https://customer.comcast.com/help-and-support/internet/wireless-gateway-enable-disable-bridge-mode

Hmmm. They must have changed the mapping of the URL. This one works;

https://www.xfinity.com/support/articles/wireless-gateway-enable-disable-bridge-mode

Do you know the speed specs for this cable modem/router?

Comcast rates the DPC3941T for a max of 700.

or perhaps, should I replace the entire cable modem with this https://nbvstore.com/products/motorola-mt7711-24x8-cable-modem-router-with-two-phone-ports-docsis-3-0-modem?variant=32268492406924?

I would ! And save the monthly rental fee, among many other advantages !!

Thanks again for you help

Quite welcome !

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EG

Expert

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110K Messages

5 years ago

@danthetvman wrote:

Do you know how the AC1900 protocol speeds compare to this model?

FWIW, that's not a "protocol". It's a specification

"can I simply use one of the ethernet wired plugs and connect it to an external WiFi router to bump my speeds?

If you are hang a stand-alone / separate router off of the gateway device, and the gateway is not in *bridge mode*, you are cascading 2 routing devices which results in an undesirable "double NAT" condition on your home network.

Google "double NAT" for info about it's potential pitfalls.

You should put it in to bridge mode in order to use a separate / sidecar router with it. Here's how;

http://customer.comcast.com/help-and-support/internet/wireless-gateway-enable-disable-bridge-mode

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EG

Expert

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110K Messages

5 years ago

Can't see your pic. Since you are a new poster, it needs to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting it at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to it here.

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danthetvman

Frequent Visitor

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8 Messages

5 years ago

No worries, the photo was just the label on the bottom of the modem/router.

Thanks for the details, I am slowly piecing this together in my brain.

This link wouldn't open for me (https://customer.comcast.com/help-and-support/internet/wireless-gateway-enable-disable-bridge-mode), but with your help, I found the link below. It went through the procedure and mentioned the pitfalls of using this method:
https://forums.xfinity.com/t5/Internet/ANSWERED-How-To-Turn-Bridge-Mode-on-and-off-on-Xfinity-modem/ta-p/3059708

Do you know the speed specs for this cable modem/router? I think I found that someone mentioned the wifi router is rated as N600, does that make sense? If so, does it makes sense to add a side-car router or perhaps, should I replace the entire cable modem with this https://nbvstore.com/products/motorola-mt7711-24x8-cable-modem-router-with-two-phone-ports-docsis-3-0-modem?variant=32268492406924?

Thanks again for you help

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danthetvman

Compare WiFi speeds of rented XB3 DPC3941T cable modem/router combo to the newer AC1900 models.

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