G707 multiplexing circuit diagram can only multiplex 2M\34M\140M signals into STM-N.

Question

Options

• ATrue
• BFalse

• A
  29% (12)
• B
  71% (29)

Explanation

B is correct because the G.707 multiplexing circuit is not limited to only 2M, 34M, and 140M signals. The ITU-T G.707 SDH standard supports a broader range of PDH tributaries, including 1.5 Mbit/s (DS1/T1) and 45 Mbit/s (DS3) signals from the North American PDH hierarchy, in addition to the European E-series rates (2M, 8M, 34M, 140M). Modern implementations also support mapping of ATM cells and Ethernet/IP payloads into STM-N frames via GFP and virtual concatenation.

Option A is wrong because it accepts an incomplete and exclusionary description of G.707's capability - stating "only" three specific rates ignores the full scope of the standard's multiplexing structure, which covers both European and North American tributary hierarchies.

Memory tip: Think of G.707 as a universal adapter - it bridges the complete PDH world (both E-series and T-series) into SDH. Any time you see the word "only" paired with a limited list of rates in an SDH question, that's a red flag that the statement is likely False.

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