Which of the following is the main control board of the UA5000 high-density system?

Question

Options

• AIPMB
• BPVMB
• CTSSB
• DPWX

• A
  76% (19)
• C
  16% (4)
• D
  8% (2)

Explanation

In the UA5000 high-density access system, both the IPMB (Integrated Processing and Management Board) and PVMB (Power and Voice Main Board) serve as the main control boards, with IPMB handling core processing and system management functions while PVMB supports power management alongside voice service control. Together, they form the central control layer of the system, which is why both A and B are correct.

TSSB (option C) is a service subscriber board responsible for connecting subscriber lines, not a main control board, so it operates at the access layer rather than the control layer. PWX (option D) is a power supply unit that provides electrical power to the chassis and is not involved in system control or management functions.

Memory tip: Think of the main control boards as the "brains and backbone" of the system. IPMB = "I Process and Manage" (core intelligence), and PVMB = "Power and Voice Management" (control for power and voice). Boards like TSSB serve subscribers and PWX serves power delivery, neither of which are control-plane functions.

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