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In Cisco CallManager 4.x, the line status in the Attendant Console is shown as a question mark (?)

Core Issue

The Attendant Console (AC) shows a question mark in the line status field within speed dials and the directory. Call control works fine and the status display is shown correctly.

It does not resolve the issue to log out and back into the AC and then to reset the CTIManager service on the Cisco CallManager Publisher and Subscribers.


Generally this issue is caused if the firewall is enabled on the client computer.

In order to resolve this issue, disable the firewall in the client PC. Or, if it can not be disabled, complete these steps:

  1. If there is a firewall placed between the Telephony Call Dispatcher (TCD) server and AC client, open these ports:
    • Transport Control Protocol (TCP) ports 1099 - 1129

    • TCP port 2748

    • All User Datagram Protocol (UDP) ports. The UDP ports are used for the line status.
  2. In order to control the UDP ports that are used by the Attendant Console for line state, configure the LocalHost IP Address field in the AdvancedSettings Dialog.

    Enter a value in the IP Address:Port format. For example,

  3. Open the UDP 2658 port at the firewall.

  4. Exclude the AC client in the firewall.

  5. Restart the computer telephony integration (CTI) and Cisco Secure Desktop services.