Deban Sarge, kernel 2.6.8, kde 3.3.

ATZ
OK
ATM1L1
OK
ATX3
OK
ATDT076610000
CONNECT 50667

Then Kppp shows that it is dialing number. After some time it tries to connect to my ISP, an then
after some 3 or 4 minutes, Kppp (or pppd) shows me this:

The pppd daemon died unexpectedly!
Exit status: 1
See 'man pppd' for an explanation of the error codes or take a look at the kppp FAQ on http://devel-home.kde.org/~kppp/index.html


After clicking on Details...

Jul 1 11:54:44 debian pppd[6347]: The remote system is required to authenticate itself
Jul 1 11:54:44 debian pppd[6347]: but I couldn't find any suitable secret (password) for it to use to do so.
Jul 1 11:54:44 debian pppd[6347]: (None of the available passwords would let it use an IP address.)

And this is situation for all my 5 ISPs.

In MAN PAGES of "pppd", exit status means:
1 An immediately fatal error of some kind occurred, such as an
essential system call failing, or running out of virtual memory.

...But isn°t that - man pages explanation - different from "Details"?!

HELP!

(Taken from the page you included in your post) - Have you tried this yet?

pppd died - The remote system is required to authenticate itself ...
As far as I can tell there are two causes for this problem:

* /etc/ppp/options contains the auth option. Simply put a # comment character in front and try again.
* Your system already has a default route. Have you set up a local network ? In thise case recent versions of pppd will behave as if the auth had been specified. To override this you may add noauth to the pppd arguments in kppp' setup dialog. Alternatively you could take down the local network prior to dialing in. I'd be thankful if someone could provide instructions on how to peacefully combine the two network connections.

I have edit file /etc/ppp/peers/kppp-options. There was #noauth. I remove "#" and left "noauth".