Sky+ & Telephone

[woofas]

I have noticed that sometimes during a call I get a signal burst which sounds like someone dialling on my line. After tracking it down, I discovered that the culprit seems to be my Sky+ box as immediately after hearing this signal the "online" light is on. It is not usually on at any other time.
Anyone with the same problem &/or know how to cure it?

[ACtheTROLL]

can't cure it - from time to time the box phones home ... perfectlt normal