Why do line states of some directory numbers show an unknown state or a question mark (?)?
A. The main reason some directory line states are unknown and always show a question mark in the line status column is because Telephony Call Dispatcher (TCD) service is not started on all Cisco CallManager servers that have phones homed in. Start TCD services on all Cisco CallManager servers that have phones homed in. If this is an upgrade, make sure that you upgrade the TCD server on all Cisco CallManager servers in the cluster. Note: In Cisco Unified CallManager 5.x/6.x, check to see if the Cisco CallManager Attendant Console service is started on the publisher and all subscribers in the cluster. In order to resolve this issue, complete these steps: • Choose User > Global Directory and look for one of the users that shows the line status as ?. Make sure that the telephone number is the same DN that the user has on his/her IP Phone. • This issue can also arise due to the firewall. Remove/Disable the firewall in order to resolve the issue in this case. Refer to http://www.cisco.com/en
