/mcpTo verify the number of concurrent login and logout requests, use the Cisco Unified Real-Time Monitoring Tool to view the Requests In Progress counter in the Extension Mobility object. For more information, see the Cisco Unified Real-Time Monitoring Tool Administration Guide at http://www.cisco.com/c/en/us/support/ unified-communications/unified-communications-manager-callmanager/products-maintenance-guides-list.html Note Database Error Problem “Error 6 Database Error” appears on the phone. Solution Check whether a large number of requests exists. If a large number of requests exists, the Requests In Progress counter in the Extension Mobility object counter shows a high value. If the requests are rejected because of a large number of concurrent requests, the Requests Throttled counter also shows a high value. Collect detailed database logs. Dev Logon Disabled Problem “Error 22 Dev Logon Disabled” appears on the phone. Solution Verify that you checked the Enable Extension Mobility check box in the Phone Configuration window (Device > Phone). Device Name Empty Problem “Error 207 Device Name Empty” appears on the phone. Solution Check that the URL that is configured for Cisco Extension Mobility is correct. See the Related Topics section for more information. Related Topics Configure the Cisco Extension Mobility Phone Service, on page 406 EM Service Connection Error Problem “Error 207 EM Service Connection Error” appears on the phone. Solution Verify that the Cisco Extension Mobility service is running by selecting Tools > Control Center—Feature in Cisco Unified Serviceability. Extension Mobility Performance During Upgrade Problem Extension Mobility (EM) login performance during Publisher switch version after the upgrade. Solution If Extension Mobility (EM) users are logged in during the switch version upgrade of Unified Communications Manager Publisher, and if the Publisher is inactive, EM login data is lost during the switch version and EM profiles are logged out. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 417 Receiving Calls Database Error