All valid external ID prefix values must be specified using the configuration rule ‘callIdPrefix’. If this is not configured, retrieving call and job history by the External ID of a call may not work properly.

External ID prefix is the first few characters of the external ID and is used to identify the system where the trouble call originated (example: If external ID is '2389583093', then '2' can be the prefix indicating that this call came from Oracle Utilities Customer Care and Billing). It is also used to guarantee that each call has unique external ID value.

For more information on configuring and working with Oracle Utilities Network Management System, see the Oracle Utilities Network Management System User Guide. The Building the System Data Model chapter in the Oracle Utilities Network Management System Configuration Guide includes information about connecting customer data to the Oracle Utilities Network Management System electrical model.