/mcpCallBack Is Not Active Problem The following error message is displayed: CallBack is not active. Press Exit to quit this screen. Possible Cause User pressed the CallBack softkey during the idle state. Solution Follow the recommended action provided in the error message. CallBack Is Already Active Problem The following error message is displayed: CallBack is already active on xxxx. Press OK to activate on yyyy. Press Exit to quit this screen. Possible Cause A user tried to activate Call Back, but it is already active. Problem Follow the recommended action provided in the error message. CallBack Cannot Be Activated Problem The following error message is displayed: CallBack cannot be activated for xxxx. Possible Cause When a user tried to activate Call Back, either the extension is not available in Unified Communications Manager database or there is no QSIG route to the destination (that is, the extension belongs to remote Proxy which is connected via non-QSIG trunk), and the extension is not found in the database. Solution The user must try again, or the administrator must add the directory number to the Cisco Unified CM Administration. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 254 Placing Calls CallBack Is Not Active