ERROR_CTX_MODEM_RESPONSE_NO_CARRIER - 7013 (0x1B65)
Carrier detect has failed or carrier has been dropped due to disconnect.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_CTX_MODEM_RESPONSE_NO_CARRIER with the numeric value 7013 and hexadecimal representation 0x1B65 indicates that a modem has failed to detect a carrier signal. This typically means that the communication line is no longer active or has been disconnected.
Error Details
This error code is specific to certain Windows API functions related to modem communications, such as those found in the wininet and winsock libraries. It signifies an issue with the connection state of a modem, which could be due to various reasons including line issues, hardware problems, or software configuration errors.
Usage Context
This error code is commonly encountered when attempting to establish or maintain a connection through a modem. It may also appear in scenarios where the system is trying to interpret responses from a modem during data transmission or initialization processes.
Developer Interpretation
When this error code is returned, it should be interpreted as an indication that the communication line has failed to provide a carrier signal. This could mean that the modem is not receiving any data on its input line, which can occur for several reasons such as a dropped connection, hardware failure, or incorrect configuration.
Developers should handle this error by checking the state of the modem and ensuring that all necessary connections are properly established before attempting further communication. It may also be useful to verify the integrity of the communication line and ensure that no external factors are interfering with the signal.
Related Errors
ERROR_CTX_MODEM_RESPONSE_NO_CARRIER(7013, 0x1B65)ERROR_CTX_MODEM_RESPONSE_TIMEOUT(7024, 0x1C88)ERROR_CTX_MODEM_RESPONSE_INVALID(7025, 0x1C89)
FAQ
Q: What does the error code ERROR_CTX_MODEM_RESPONSE_NO_CARRIER indicate?
A: This error indicates that a modem has failed to detect a carrier signal on its input line. It suggests that the communication line is no longer active or has been disconnected.
Q: How should developers handle this error?
A: Developers should check the state of the modem and ensure that all necessary connections are properly established before attempting further communication. Additionally, verifying the integrity of the communication line can help identify potential issues.
Summary
The ERROR_CTX_MODEM_RESPONSE_NO_CARRIER error code is a generic indication that a modem has failed to detect a carrier signal. It should be handled by ensuring proper connection and communication line integrity. Developers are advised to review their implementation context and verify the state of the modem before taking further action.