What make/model of TalkTalk router do you have? Is this over a wired or wireless connection? Do you get any error messages & if so, exactly what do they say?
Please can you provide a link to a manual or user guide of this Nest Hub device that covers the connection method? I have had a quick look on line & can't see one on their support site, only other products in this range.
I am not employed by TalkTalk, I'm just a customer. If my post has fixed the issue, please mark it as the Best Answer.
OCE's and Community Stars - Who are they?