06-15-2011 10:18 PM
just installed my "new and faster" Xfinity modem. It works only if connected directly to my PC but when i hook it up to my Linksys Wireless G broadbad Router (model wrt54g) i do not get an internet connection. Is there a compatablity issue between the two. I do not have this issue when i hook up the old modem.
06-15-2011 10:26 PM
This answer exists throughout the forum, in many threads,
If you change the device connected to the modem, you need to power cycle from the wall out. If the Xfinity modem is an eMTA (including phone service), then you need to power cycle it using the recessed reset button. (Due to the battery backup in an eMTA.)
Power cycle the modem, then the router. When all have settled in (lights lit steadily is the general indicator) then boot up the computer.
06-19-2011 01:14 PM
Had to go to the Ubee website to get the model number because there was no
model number in the packing nor the unit itself. It looks like the model number is
DOC SIS 3.0 Modem U10C035.
I appreciate any help.
06-19-2011 01:47 PM - edited 06-19-2011 02:08 PM
Go here (PDF reader needed);
Go to section 2.6.2 for instructions on how to reset the modem to factory defaults. Log in to it and try it.
Instructions for logging in are also there in section 2.4
09-10-2011 11:25 PM
I have this same problem with the same equipment. I have a ubee DDM3513 modem and a Linksys WRT54G wireless router. I have followed through this thread step by step with no success.
My ubee DDM3513 can not be reset to the default settings due to when I log into the modem using 192.168.100.1 and select "modem" in the upper right corner it brings me back to the modem summary page.
If there is a solution to this connectivty problem please point in the right direction.
09-22-2012 09:42 PM
The newest Xfinity modem (black, stands vertical, & has a vertical row of light blue lights) that's shipped from a warehouse, is also a wireless router. I have one. Call 1-800-COMCAST & ask them about one. Shipping is $9.95 & the old modem will ship back free by just taking it to the UPS Store.
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