We can not walk customers through it. Fax machines and some answering machines using the same line that the modem does can cause disconnects. Disable any fax machines or answering machines and try connecting to the Internet without them. Simply turning them off may not have the desired effect. To play it safe, make sure they are unplugged and that your modem has a line straight from the wall.
Some modems just have a hard time staying connected on the Internet.
There are a number of types or specific models of modems that cause more problems than others. The phone lines . What may work for voice communication, may not work well for data communication. Especially high-speed data communication using networking protocols. The Internet is a demanding creature.