Error | "399: line not configured" when registering a Softphone with CUCM

Learn how to resolve the error when attempting to register a softphone with Cisco Unified Communications Manager.

Updated at May 10th, 2023

Message

"399: line not configured" when registering a Softphone with CUCM.


Definition

"399: line not configured" is a message from CUCM meaning it is expecting a specific extension for the Digest User.


 

Solution | Workaround

To resolve, verify that the Digest User extension number matches the User Name field of the Softphone setup. This includes the full extension number. So, if the site uses a 5 digit or 10 digit extension, this must be the same in the User Name field of the Softphone setup.