/mcpRestrictions Feature Video is not supported with intercom. Video An intercom partition assigned to an item such as calling search space or to a route pattern cannot be deleted. Intercom Partition Intercom calling search spaces that devices, lines (DNs), translation patterns, or other items are using cannot be deleted. Intercom Calling Search Spaces Intercom Troubleshooting Busy Tone When Dialing Out of Intercom Line Problem Phone plays busy tone when user is dialing out of intercom line. Possible Cause The DN is not in the same intercom partition as the calling number. Solution • Ensure that the DN is in the same intercom partition as the calling number. • I f it is, ensure that the dialed-out DN is configured on another phone and that the phone is registered with the same Unified Communications Manager cluster. Intercom Calls cannot use Talkback with Speaker, Handset or Headset Problem User cannot go into talkback mode for intercom calls by using headset, handset, or speaker. Possible Cause This situation exists by design. The only way to go into the connected state for intercom calls is by pressing the corresponding line button. Solution User can end call by using speaker, handset, or headset. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 318 Placing Calls Intercom Troubleshooting