MicroGate SDLC Adapter is Not Being Allowed Time to Reset DSR

ID: Q180931

The information in this article applies to:

Microsoft SNA Server versions 3.0, 3.0 Service Pack 1 (SP1), 3.0 SP2, 4.0

SYMPTOMS

Microsoft SNA server is trying to dial out too quickly and not giving the MicroGate SDLC adapter and modem time to reset the interface leads. The SDLC link service should implement a hold-down timer after dropping DTR before it raises it. This should be configurable in the registry and default to 100 ms.

STATUS

Microsoft has confirmed this to be a problem in SNA Server versions 3.0, 3.0 SP1, 3.0 SP2, and 4.0.

This problem was corrected in the latest SNA Server versions 3.0 and 4.0 U.S. Service Packs. For information on obtaining these Service Packs, query on the following word in the Microsoft Knowledge Base (without the spaces):

   S E R V P A C K

MORE INFORMATION

Once the hotfix is applied, SNA Server will have a default delay of 1000ms once DTR is dropped. To configure this delay:

1. Apply the hotfix.

2. Start the Windows NT Registry Editor (Regedt32.exe) and find the

   following key:

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet
      \Services\SnaSDLC1\Parameters\

3. Add the following entry to this key:

      Value Name: DropDTRDelay
      Data Type: REG_DWORD
      String: <delay in milliseconds>

The MicroGate SDLC adapter is manufactured by MicroGate, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

Keywords          : sna3rdparty kbbug3.00 kbbug3.00.sp2 kbbug3.00.sp1 snasdlc 
Version           : WINDOWS:3.0,3.0SP1,3.0SP2
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbfix

Last Reviewed: September 27, 1998