Which of the following slots can the TSSB board of UA5000 high-density be inserted in?

Question

Options

• A4, 5
• B6, 7
• C16
• D17

• A
  8% (5)
• B
  17% (11)
• C
  3% (2)
• D
  72% (46)

Explanation

Option D (slot 17) is correct because in the UA5000 high-density chassis, slot 17 is the dedicated and only supported slot for the TSSB (Traffic Switching and Synchronization Board) - Huawei's hardware design reserves this specific slot for the TSSB due to its backplane connectivity and synchronization signal routing requirements.

Slots 4 and 5 (option A) and slots 6 and 7 (option B) are service/subscriber board slots, designed for line interface cards rather than switching and synchronization functions. Slot 16 (option C) is reserved for a different system board (typically the control or main processing board), not the TSSB.

Memory tip: Think "TSSB = 17" by associating the "S" in TSSB with "Seventeen" - the Switch board goes in the Seventeenth slot. Since the UA5000 high-density has a fixed chassis layout, remembering that slot 17 is the last dedicated system slot before the subscriber slots helps anchor this fact.

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