Hi Tim,

This new addition to the Call History Directory is to support the built-in Intercom capabilities available in CCM 6.x. Have a look;

Intercom Call History

Allows you to view the most recent intercom calls.

From this A-Z Phone feature Guide;

http://www.cisco.com/en/US/products/hw/phones/ps379/products_user_guide09186a00805f165d.html

Intercom

The Intercom feature allows a user to place a call to a predefined target (phone). The called destination auto-answers the call in speakerphone mode with mute activated. This sets up a one-way voice path between the initiator and the destination, so the initiator can deliver a short message, regardless of whether the called party is busy or idle.

To ensure that the voice of the called party is not sent back to the caller when the intercom call is automatically answered, Cisco Unified Communications Manager implements whisper intercom. Whisper intercom provides only one-way audio from the caller to the called party. The called party must manually press a key to talk to the caller.

From these CCM 6.x release notes;

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/rel_notes/6_0_1/601cmrn.html#wp45652

Hope this helps!

Rob