What is the Cisco Unified Communications Manager implementation of one-way intercom referred
to as?

A.
One-Way Intercom monitor

B.
Whisper Intercom

C.
Secure Intercom

D.
Silent monitor

Explanation:
Whisper intercom means that only one-way audio exists from the caller to the called
party. The called party must manually press a key to talk to the caller
Link: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_6_1/ccmfeat/fsintrcm.html