Calls made to Contact Center agent extension fails

Per User

1. Login to Configuration Manager for Contact Center
2. Click Users
3. Edit the affected user (the destination agent)
4. On the Phone tab
5. Select a different script for the Script Name - PBX Number
6. Click Save
7. Change the script back to the desired script for Script Name - PBX Number
8. Click Save

In Bulk

If you have many agents affected or you want to complete this for all agents as a precaution. Make a note of your expected PBX Number script by default this is usually the Agent Extension script 

1. Login to Configuration Manager for Contact Center
2. Click Scripts
3. Edit the Agent DID script script

4. Click Assign new channel(s)
5. Check the Agents (Channel type agent virtual #)

6. Click Assign
7. Click Yes when prompted are you sure
8. Click Save
9. Click Back to the script list
10. Edit the expected script (usually Agent Extension script)

11. Click Assign new channel(s)

12. Check the Agents (Channel type agent virtual #)
13. Click Assign
14. Click Yes when prompted are you sure
15. Click Save