Which of the following statements about IAD196 functions and features are CORRECT? (Multiple Choice)

Question

Options

• AOne IAD196 supports 196 POTS users at most.
• BOne IAD196 provides 1 main control board slot and 3 interface board slots.
• CIt supports local switch.
• DWhen configured with ASI board, it is capable of power-off survival.

• A
  11% (3)
• B
  71% (20)
• D
  18% (5)

Explanation

B and C are correct because the IAD196 is physically designed with exactly 1 main control board slot and 3 interface board slots - this is a fundamental hardware specification of the chassis. Local switching is also a supported feature, allowing subscriber-to-subscriber calls to be handled locally without traversing the upstream network.

Option A is wrong because the "196" in IAD196 refers to the device model designation, not a hard cap of 196 POTS users. The actual maximum user capacity depends on which interface boards are installed across the 3 slots, so the user count can vary.

Option D is wrong because power-off survival (the ability to maintain basic POTS service during a power failure) is typically provided by a dedicated power-fail transfer mechanism, not the ASI (Analog Subscriber Interface) board. The ASI board handles analog voice conversion, not emergency power routing.

Memory tip: Think "1 brain, 3 hands" - the IAD196 has 1 control board (the brain) and 3 interface board slots (the hands that connect users). Local switching means the hands can talk to each other directly without phoning home.

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