How To Fix T5103 - No recipient could be determined for call to number &1

SAP Error Message - Details

• Message type: E = Error

• Message class: T5 - SAPphone: Messages for telephony

• Message number: 103

• Message text: No recipient could be determined for call to number &1

What causes this issue?

The telephone number called could not be assigned to a user. There are
a number of possible causes:
The number could not be assigned to a telephony server (it may be that
the available telephony servers are not maintained correctly).
The called number together with the telephony server is not assigned to
a work center. The telephone number and the telephony server must be
assigned correctly before the work center can be determined.
No user could be assigned to the work center (it may be that no-one is
using the device at present).

System Response

Function canceled. The call is not displayed on screen or processed
further.

How to fix this error?

Please check the called telephone number. If the number is correct, you
should check the work center-specific and the client-wide settings.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message T5103 - No recipient could be determined for call to number &1 ?

  The SAP error message T5103 "No recipient could be determined for call to number &1" typically occurs in the context of using the SAP system to initiate a communication, such as a phone call or sending a message, where the system is unable to identify a valid recipient for the specified number.
  
  Cause:
  
  Invalid Number Format: The number provided may not be in the correct format or may be missing required components (e.g., country code).
  Missing Master Data: The recipient's master data (e.g., telephone number) may not be maintained in the system.
  
  Configuration Issues: There may be issues with the configuration of communication settings in SAP, such as missing or incorrect settings in the communication method.
  User Authorization: The user may not have the necessary authorizations to access the recipient's data.
  Integration Issues: If the system is integrated with external communication systems, there may be issues with the integration setup.
  
  
  Solution:
  
  Check Number Format: Ensure that the number