How To Fix T5021 - Access to the telephone network failed (0x&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: T5 - SAPphone: Messages for telephony

• Message number: 021

• Message text: Access to the telephone network failed (0x&1)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message T5021 - Access to the telephone network failed (0x&1) ?

  The SAP error message T5021, which states "Access to the telephone network failed (0x&1)," typically indicates an issue with the integration between SAP and the telephony system. This error can occur in scenarios where SAP is trying to access telephony services, such as when using the SAP Telephone Integration (CTI) or SAP Business Communication Services.
  Causes:
  
  Configuration Issues: Incorrect configuration settings in the telephony system or in the SAP system can lead to this error.
  Network Problems: Network connectivity issues between the SAP system and the telephony system can prevent access.
  Telephony System Down: The telephony system may be down or not responding.
  Authorization Issues: The user or system may not have the necessary permissions to access the telephony services.
  Software Bugs: There may be bugs or compatibility issues in the SAP software or the telephony software.
  
  Solutions:
  
  Check Configuration: Verify the configuration settings in both the SAP system and the telephony system. Ensure that all parameters are correctly set up.
  Network Connectivity: Test the network connection between the SAP system and the telephony system. Ensure that there are no firewalls or network policies blocking access.
  Telephony System Status: Check the status of the telephony system to ensure it is operational. Restart the telephony services if necessary.
  User Permissions: Ensure that the user or system has the necessary permissions to access the telephony services. Review user roles and authorizations.
  Logs and Traces: Check the SAP application logs (transaction SLG1) and the telephony system logs for any additional error messages or clues.
  Update Software: Ensure that both the SAP system and the telephony system are updated to the latest versions to avoid any known bugs.
  Consult Documentation: Refer to the official SAP documentation or the documentation for the telephony system for specific troubleshooting steps related to the integration.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the T5021 error.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Support: If the issue persists, consider reaching out to SAP Support for further assistance.
  
  By following these steps, you should be able to diagnose and resolve the T5021 error in your SAP environment.