I've had the 100 for a few years and gave away my spare to a friend last fall to help them get off a copper landline & save $. Mine works great and I've never had an issue, I just like to keep spares of my IT equip and want to replace that spare. Perhaps I will go for the 200 model, if I find out the 100 has been discontinued....so if anybody has an answer to my question I'd appreciate it. ;-)