Hi, I am a Linux newbie having problems using ISDN. I have RedHat 5.0, dual booting on a separate partition of 1 gig. All RPMs seemed to be installed. Under Win95 I use a Racal Extol BRI Terminal Adapter (in association with Acotec ISDN for Windows). As I believe Linux automatically supports ISDN with TA - interpreting as a simple modem - I guess I do not need any additional software loaded. However, I get no response from "ping" or ATDT calls to my own number - which is on a separate line. One confusion is the identity of the serial ports used under Win95. The TA1 is shown as COM5 and TA2 as COM6. I thought these should equate to cua4 & cua5 but these are not shown in Modemtool & linking using # ln -s /dev/cua4 /dev/modem (etc) does not seem to work either. I know that Racal is not the most popular TA around and I don't wish to get new hardware or go back to normal modem if I can help it. Any help would be much appreciated. Meyrick -- PLEASE read the Red Hat FAQ, Tips, Errata and the MAILING LIST ARCHIVES! http://www.redhat.com/RedHat-FAQ /RedHat-Errata /RedHat-Tips /mailing-lists To unsubscribe: mail [EMAIL PROTECTED] with "unsubscribe" as the Subject.