- on Microcontrollers
- Published in issue 7/2002 on page 0
Modem Line Protection
We haven’t yet experienced this first-hand, but it seems to occur more often that when some websites are visited they switch the Internet connection over to a premium rate dial-up number. This is of course very irritating, because it is hardly noticeable and it certainly costs a lot more.This circuit is simplicity itself, but still offers effective protection against these practises.