Which three events describe the relationship of an IP phone to its secondary subscriber in a Cisco Unified Communications Manager system? (Choose three.)

Question

Options

• AThe IP Phone sends a TCP connect message.
• BThe IP Phone sends a TCP keepalive message every 30 seconds.
• CThe IP Phone sends a TCP keepalive message every 60 seconds.
• DThe IP Phone registers with the primary system when the secondary system is unavailable.
• EThe IP Phone attempts to register with the secondary system when the primary system is
• FThe IP Phone registers with all the Cisco Unified Communications Manager subscribers in the

• A
  74% (35)
• C
  4% (2)
• D
  6% (3)
• F
  15% (7)

Explanation

The phone-to-CUCM relationship for a secondary subscriber involves three key behaviors. (A) The IP phone sends a TCP connect message to establish the SCCP or SIP connection to the secondary subscriber when registering. (B) The IP phone sends a TCP keepalive message every 30 seconds (not 60) to maintain the connection and detect if the server has become unreachable. (E) When the primary CUCM becomes unavailable, the IP phone attempts to register with the secondary system listed in its configuration file. The phone does not register with all subscribers simultaneously, and the keepalive interval is 30 seconds, not 60.

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