При запуске sudo pppoeconf (настройка модема)
выскакивает вот такая ошибка
Sorry, I scanned 1 interface, but the Access │
│ Concentrator of your provider did not respond. Please │
│ check your network and modem cables. Another reason │
│ for the scan failure may also be another running pppoe │
│ process which controls the modem.

что посоветуете?