Broadband issue. any ideas?

I live in a ground floor flat. Bt broadband run by cable. Whenever somebody leaves or enters our block its cuts out. Is there any logical explantion?

I live in a ground floor flat. Bt broadband run by cable. Whenever somebody leaves or enters our block its cuts out. Is there any logical explantion?

or:I live in a ground floor flat. Bt broadband run by cable. Whenever somebody leaves or enters our block its cuts out. Is there any logical explantion?

or:Tell your cable company that service is erratic. They are the ones who keep it working.

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