Resolving Stalled Output (‘output hangs’) on Terminals connected to Digi Terminal Concentrators using Digiboard Drivers Prior to 2.3.0

Digiboard drivers prior to Version 2.3.0 (known as Release ‘S’) for Windows NT 4.0 and 3.51 appear to contribute to an output stalling problem. This stalling problem manifests itself on terminals connected to Digi Terminal Concentrators. No more output appears on the terminal, including that of entered characters being echoed. This condition usually shows up by the mvBase process for the affected line having a persistent PIB status of 7F20 (as displayed by the WHERE TCL command).

This could occur in either of the following conditions:

• The Digi Host Adapter is physically located in the system running the mvBase server (thus controlled by the local mvBase workstation).

• The Digi Host Adapter is in a different system to the mvBase server (and thus controlled by the remote mvBase Workstation on that remote system), although this situation has not yet been directly observed in the field.

Digi driver releases that have been shown to manifest this problem include v2.1.0 (known as the ‘R’ release) and v2.2.6 (the 4PS ‘S beta’ release). The ‘S’ release, v.2.3.0, has been tested with mvBase and not shown to exhibit this problem.

We recommend implementing these actions to prevent stalled output:

1. Obtain and install new Digiboard drivers from the Digi International Web Site:

   • http://www.dgii.com/support/index.html

2. At time of publication (12/97) the latest driver (release ‘S’) is obtained by downloading the file 4000821S.exe. This driver covers the following Digi products on Windows NT 3.5.1 & 4.0 on the Intel and Alpha platforms: Xe, MC/Xe, Xi, MC/Xi, Xr, Xem, C/X and EPC/X.

3. Always obtain the latest drivers available for your Digi product, specific to your operating system and platform. This mvBase Technical Tip will not be constantly updated whenever Digi International issue drivers beyond v2.3.0.