How To Fix T5008 - Communication error: Connection to telephone cannot be created

SAP Error Message - Details

• Message type: E = Error

• Message class: T5 - SAPphone: Messages for telephony

• Message number: 008

• Message text: Communication error: Connection to telephone cannot be created

What causes this issue?

A program is to be started on a remote computer using RFC. The
specified RFC destination is &V2&. The following error occurred during
the call: &V1&.
There are a number of possible causes:
The RFC destination contains incorrect entries, that is, the entry
specifying the location of the program to be started is incorrect.
The program is not installed on the remote computer, is installed in a
different directory or is not ready for use.

System Response

Function canceled.

How to fix this error?

Check the settings for the specified RFC destination.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message T5008 - Communication error: Connection to telephone cannot be created ?

  The SAP error message T5008, which indicates a "Communication error: Connection to telephone cannot be created," typically arises in scenarios where SAP is trying to establish a connection to a telephony system or device, such as a telephone or a VoIP system, but is unable to do so. This can occur in various contexts, such as when using SAP's telephony integration features.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the telephony system.
  Configuration Errors: Incorrect configuration settings in the SAP system or the telephony system can prevent successful communication.
  Telephony System Down: The telephony system or device may be down or not properly configured to accept connections.
  Firewall Restrictions: Firewalls or security settings may be blocking the necessary ports for communication.
  SAP Notes: There may be specific SAP Notes that address known issues or bugs related to telephony integration.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the SAP system and the telephony system is stable and functioning. You can use tools like ping or traceroute to diagnose connectivity issues.
  Review Configuration Settings: Verify the configuration settings in both the SAP system and the telephony system. Ensure that all parameters, such as IP addresses, ports, and protocols, are correctly set.
  Test Telephony System: Check if the telephony system is operational. You may need to restart the telephony service or check its logs for any errors.
  Firewall Settings: Review firewall settings to ensure that the necessary ports for communication are open. Consult with your network administrator if needed.
  Check SAP Notes: Look for any relevant SAP Notes that may provide guidance or patches for the issue. You can search the SAP Support Portal for T5008 or related keywords.
  Consult Documentation: Review the documentation for the telephony integration you are using to ensure that all prerequisites and configurations are met.
  
  Related Information:
  
  SAP Telephony Integration: Familiarize yourself with the specific telephony integration you are using (e.g., SAP CTI, SAP Business Communication Services) to understand its requirements and configurations.
  Logs and Traces: Check the SAP application logs (transaction SLG1) and the telephony system logs for any additional error messages that may provide more context on the issue.
  Support: If the issue persists after troubleshooting, consider reaching out to SAP support or your telephony vendor for further assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the T5008 error in your SAP environment.