In a PON deployment, which active device is installed at the work area?

Question

Options

• AOptical amplifier
• BOptical line terminal
• COptical network terminal
• DSplitter
• EWireless access point

• A
  4% (3)
• B
  1% (1)
• C
  76% (51)
• D
  7% (5)
• E
  10% (7)

Explanation

Option C (Optical Network Terminal) is correct because the ONT is the active device installed at the customer's premises (the "work area") in a PON deployment. It terminates the optical fiber from the network and converts optical signals into electrical signals that end-user devices can use.

Why the distractors are wrong:

• A. Optical amplifier - used mid-network to boost signal strength over long distances, not at the subscriber's location.
• B. Optical line terminal (OLT) - this is the active device at the provider's end (central office/headend), not the customer's end. OLT and ONT are opposites in a PON.
• D. Splitter - a passive (not active) device that divides the optical signal among multiple subscribers; it has no power source and sits between the OLT and ONTs.
• E. Wireless access point - a general networking device, not a PON-specific component and not what terminates the optical connection.

Memory tip: Think of it as a mirror pair - OLT is at the Local exchange (provider), ONT is ON-site at the customer. The "T" in both stands for Terminal, and the middle letter tells you which end - Line (provider side) vs. Network (user side).

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