It's possable that it's not in /dev/modem .Using KPPP try to use other ports to query the modem, change /dev/modem to /dev/ttyS0 and so on and query again until the modem returns an answer.

If the lucent LTmodem driver installed correctly there should be a new device and /dev/modem should have been set to link to it. Check your /dev file with ls -al | less. You should be able to scroll through the file with the cursor keys.

There should be /dev/modem -> /dev/ttyLT0. /dev/ttyLT0 is not an entry on kppp dialer.

/dev/modem links to /dev/ttys0. Shouldn't it link to the file /dev/tts/LTO ? If so how do I make it?

First check to see that /dev/ttyLT0 was made. If it was not then this suggests an error in installing the LTmodem package. There are 3 commands that you must enter to build a working lucent LTmodem driver and the final one make the link for you. The first command is given in the install instructions after the modem package is extracted. You are prompted for the subsequent commands in the text that scrolls by.

The first command is "./build_module"

You should then be prompted "./ltinst2" and finally "./autoload" (Note these command are from an older version. Double check them on the text that scrolls by.

The "./autoload" command should make the link and write entries to you module.conf file so the the modem modules load on demand.

In summary 1) Delete the modem link to /dev/ttyS0 with rm /dev/modem
2) Rerun ./build_module ./ltinst2 ./autoload
3) Configure kppp with /dev/modem.

I'm typing this from Konqueeror Web Browser. Thanks a lot for all your help.

Stephen