/mcpStep 2 Perform one of the following tasks: a) To update the area code for all gateways, enter the area code in the Area Code field and click Set Area Code . A message displays that indicates that you must click Update to save changes. Click OK. b) To update the area code for specific gateways, enter the area code for each gateway that you want to configure in the area code field for that gateway. Step 3 In the Max No. of Ports field, enter the number of ports for each gateway that you want to configure. The maximum number of ports range goes from 1 to 999. Note CAR uses the values that were provided for the gateway when it was added in Cisco Unified CM Administration. Therefore, some gateways will already have an area code setting or have a zero for maximum number of ports, depending on the details that were specified when the gateway was added in Cisco Unified CM Administration. CAR does not accept 0 as a value for the maximum number of ports; you may be prompted to change the maximum number of ports for all gateways with a value of zero. Step 4 Click Update. You can run reports in CAR on any or all the configured gateways. Set Up Trunk Configure the trunks in CAR for existing Unified Communications Manager system trunks. After you add trunks to Cisco Unified CM Administration, configure the new trunks in CAR. When trunks are deleted from the Unified Communications Manager system, the system automatically removes the trunks (and any configuration settings that you specified) from CAR. Tip CAR uses the area code information to determine whether calls are local or long distance. You must provide the Number of Ports information for each trunk to enable CAR to generate the Utilization reports. This section describes how to configure trunks in CAR. Procedure Step 1 Choose System > System Parameters > Trunk Configuration. The Trunk Configuration window displays. Note If you have not configured trunks in Cisco Unified CM Administration, a message displays that indicates that you have not configured trunks for the system. Step 2 Perform one of the following tasks: a) To update the area code for all trunks, enter the area code in the Area Code field and click Set Area Code. A message displays that indicates that you must click Update to save changes. Click OK. Call Reporting and Billing Administration Guide for Cisco Unified Communications Manager, Release 15 and SUs 35 CDR Analysis and Reporting Set Up Trunk