You try to initiate the dialer in Windows 7 and only found that it doesn’t work and returned with an Error 651: Your modem (or other connecting device) has reported an error. You had tried to restart your PC, your router, your modem etc. and the problem doesn’t go away.
The Possible Solutions
It is not hard to find that there are a number of users encounter this issue on the internet, but surprisingly this error bugs some of the Windows 7 (Beta or even RTM) users and it seems that there is actually no official solution for it.
There are, however, a lot of workarounds, suggested, of course, by other users. If you have this problem in Windows 7 (or may be Windows Vista/XP as some of the solutions works on these operating systems, too), check out what I have found for the possible solutions for this error: