RAS Error 652 with US-Robotics 14400 Sportster (123168)
The information in this article applies to:
- Microsoft Windows for Workgroups 3.11
This article was previously published under Q123168 SYMPTOMS
After you configure the Windows for Workgroups Remote Access Service (RAS)
client with a US-Robotics 14400 Sportster modem, or some Gateway Telepath
and internal modems, for call-back from a RAS server, the modem fails to
reinitialize in call-back mode and the following error message appears:
Error 652: Unrecognized text response received from the device.
Make sure the device you selected in Setup matches your modem.
CAUSE
This problem occurs because the RAS client software in Windows for
Workgroups version 3.11 does not keep the Data Terminal Ready (DTR) signal
state low long enough for the modem to release the line. In this case, DTR
was in the low state for approximately 1 millisecond. The US-Robotics
14400 Sportster modem requires the DTR to be in the low state for at least
5 milliseconds.
STATUS
Microsoft has confirmed this to be a problem in Windows for Workgroups
version 3.11. We are researching this problem and will post new
information here in the Microsoft Knowledge Base as it becomes available.
The US-Robotics 14400 Sportster modem is manufactured by US-Robotics, a
vendor independent of Microsoft; we make no warranty, implied or
otherwise, regarding this product's performance or reliability.
| Modification Type: | Major | Last Reviewed: | 10/29/1999 |
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| Keywords: | KB123168 |
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