Computer Questions Not Worth Their Own Thread II

[Samson]

What is going on with my parents BT internet?

It makes no sense to me. They have:

• ADSL internet over BT landline, copper I think
• BT supplied and branded router providing wifi and wired internet
• BT supplied lineline "walkabout" phone and base station

If they keep the phone at the other end on the house from the router it works fine. If they bring the phone near the router while they are using it it breaks their internet for about 5 or 10 minutes. It breaks even the wired connection, that has not been transmitted over RF at any point.

My only solution is to get a wired phone, but there must be a way to fix it.

 

[The_J]

The spectrum certain cordless phones send on can interfere also with weakly insulated cables (and other non-cable based transmissions).
So either you need better cables, or a new phone.
Or the ghostbusters, IDK, but the phone is indeed most likely the culprit.