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STATUS_CTX_RESPONSE_ERROR
The modem rejected the command sequence
This is a modem-command failure in a legacy Terminal Services connection path. It indicates that the configured modem command sequence and the attached modem behavior are not aligned.
It differs from no carrier or timeout conditions: the modem did respond, but not in the way required by the configured script or driver definition.
What to inspect
- Capture the exact modem model, driver definition and initialization string.
- Check whether the modem is operating in voice, fax, data, or incompatible command mode.
- Compare with TAPI/RAS logging before changing Remote Desktop listener settings.
References
- Microsoft: TAPI portal
- Microsoft: Routing and Remote Access Service
- Microsoft: Terminal Services API portal
- Microsoft Open Specifications: NTSTATUS values
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