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We bought a new router for wireless networking but when we plug in the line from the phone jack, the router detects no connection also, which is very strange is that the home phones in our house go offline.

Start date? you mean when i got the internet? If so then im not sure but i had it for years now, my old router which was not wireless was working until i pulgged in te new router. I bought the router not from the ISP but from cosco

Who is your ISP? Verizon?
What modem do you have? You cannot plug in a router and connect it without the modem to your ISP.
As for the home phones not working, do you have filters installed?
i_Xp/VistaUser

Modem? I dont think i have one, but my old router worked without one, we do have filters also, everythiong was working perfectly until i plugged in the new router

I suspect the router you bought from Costco is not supported by Bell but who knows - so call Bell ISP Tech Support.
i_Xp/VistaUser

I think you didn't install the DSL filters correctly.
Playing to the angels
Les Paul (1915-2009)

They sell 2Wire Modems at Costco that is support by SBC which was bell at one time but got bought by AT&T which still supports those. And, yes your problem is you did not install the filters on all of your phones. The phones need to be filtered and the modem is NOT. Hook the modem direct to the wall.

Let's review;
newly purchased router when connected doesn't work
incidently the phones quit working also.Everything is working otherwise.
Hmm doesn't sound like it has anything to do with filters. They have been working for years according to the OP
Here is what we don't know;
Where is the existing working router and how are things connected to it.When the new router is plugged in, where is it being plugged in? Replacing the old router?
Are these VoIP phones or a single phone number connected to multiple analog phones?
Is the old router actually a combo unit of modem and router which is why Gutsman0X says he doesn't know about a modem?
Very possible the new router is being plugged into the filtered phone line thereby causing a short which explains the phone outage.

"We bought a new router for wireless networking but when we plug in the line from the phone jack"
This is really a Modem he just called it a router.
But you could be right he has not responded yet so we will see.

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