Having major problems with constant drop out. Modem lights on internet and voip drop out every few minutes. This has been an ongoing problem since swiching over to NBN. Telsta has checked the line to the house in the past and told us all is fine. Thinking it might be a fauly modem. Any help would be great. The conceting has droped out 5 times while writing this short message. And of course we have no phone line while it is down. ... View more