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ERROR_CTX_MODEM_RESPONSE_NO_DIALTONE
Dial tone not detected within the required time. Verify that the phone cable is properly attached and functional.
ERROR_CTX_MODEM_RESPONSE_NO_DIALTONE is Win32 error 7014 (0x00001B66).
What to verify
Verify whether the modem detects a usable dial tone before the configured dialing deadline. Check line connection and dial-tone test, dial prefix and location settings, and modem country profile.
Likely causes
- the telephone cable is disconnected.
- the line requires an outside-line prefix.
- the modem uses the wrong country or line profile.
- the line has no service or incompatible signaling.
Troubleshooting steps
- Collect line connection and dial-tone test.
- Record dial prefix and location settings.
- Correlate modem country profile with TerminalServices operational logs, session and user-configuration records, device or modem diagnostics, and the caller’s connection trace.
Handling, retry, and recovery
Restore line service or correct dialing/location settings, then verify dial tone with the modem diagnostic tool before retrying callback.
Related errors
ERROR_CTX_MODEM_RESPONSE_BUSY means dialing reached a busy destination; this code means dialing could not begin normally
Example
A server moved behind a PBX but the callback number lacks the outside-line prefix. Updating the dialing rule lets the modem detect tone and place the call.
References
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