ISDNPM 3.x is an OS/2-Dialer with support for modem, CAPI 1.1/2.0 and xDSL (PPPoE). It supports NAT/IP-Masquerading and has many filter options for dial-, timeout- and package filter. It can be used as an ISDN dial-in server with authentification via phone number and/or user id.
http://hobbes.nmsu.edu/cgi-bin/h-search?key=isdnpm302r7.zip
Source: OS2VOICE