To test the Digi ports under Windows NT 4.0, use the Windows NT HyperTerminal application.
Windows NT will only recognize port names above COM9 if they are prefixed with "\\.\". For example, to access COM10, use "\\.\COM10". For the sake of consistency, this convention may also be used for COM1-COM9, if desired. Most communications applications handle this automatically; consult your application's documentation to see how it handles port names.
The Windows NT device driver supports ALTPIN software re-wiring of the DCD and DSR signals to facilitate the use of 8-pin RJ-45 connectors with adapters which support RJ-45 connections.
Please note, however, that Microsoft RAS does not support ALTPIN. Therefore, if your adapter is equipped with RJ-45 connectors, and you intend to attach modems, you must use full 10-pin RJ-45 connectors.