I use a dial-up modem for work. I dial out using special software over ym regular landlines. I do not have a dial-up Internet service and I don't connect to the Internet, I simply connect directly to my client. My modem disconnects at roughly the same times each week. I've had my phone company look at my lines four times, and repeatedly they've found no problems. They've changed my switch card, changed my feeder pair at the neighborhood box, changed the office equipement, and changed the copper cable pair to my neighborhood. I've replaced my modem, made sure all my other cords are three inches from my phonje line, and I've added S10=100 to my modem settings. Nothing has worked. What could the problem be and how can I fix it?