Doorway version 2.32 is no longer compatible with non-FOSSIL communications, and should use the SYSF option to enable FOSSIL support. For non-FOSSIL environments version 3.31 or earlier should be used instead.

Doorway v2.32 - Doorway Remote Access for DOS. Released October 20, 2006. (http)

Doorway v2.31 - Doorway Remote Access for DOS. Released February 2, 1996. (http)

Doorway v2.22 - Doorway Remote Access for DOS. Released September 1, 1993. (http)

MicroTelnet 1.0b2 - Doorway compatible Win32 telnet terminal. Released October 24, 2006. (http)