SDH can transmit any rate signal in the SDH system after being packaged.

Question

Options

• ATrue
• BFalse

• A
  74% (28)
• B
  26% (10)

Explanation

Option A is correct because SDH (Synchronous Digital Hierarchy) uses a flexible container-based packaging mechanism - mapping signals into Containers (C) and Virtual Containers (VC) - that allows it to accommodate signals of virtually any rate, including PDH tributaries (E1, E3, T1, T3), ATM, Ethernet, and others. Once a signal is mapped and packaged into the appropriate container with necessary overhead, it can be transported end-to-end through the SDH network regardless of its original rate. Pointer mechanisms also handle timing adjustments, ensuring smooth transport even when the payload rate doesn't perfectly align with SDH's synchronous frame boundaries.

Option B (False) is incorrect because it implies SDH is rate-inflexible, which contradicts its core design purpose - SDH was specifically engineered to multiplex and transport a wide variety of payload rates through its hierarchical container structure.

Memory tip: Think of SDH containers like shipping boxes - no matter what item (signal rate) you need to ship, you find the right box size (container type), pack it in, label it (add overhead), and the shipping network (SDH) carries it without caring what's inside. "Package it and send it" = SDH's universal transport promise.

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