Instructions: Answer the following questions in 2-3 complete sentences based on the information in Recommendation G.704.

1. What is the primary scope and purpose of ITU-T Recommendation G.704?
2. List the five hierarchical levels (in kbit/s) for which this recommendation defines synchronous frame structures.
3. In the 1544 kbit/s frame structure, what is the F-bit, and what are its primary functions?
4. Describe the role of the Cyclic Redundancy Check (CRC) as a performance monitoring method within the 1544 kbit/s 24-frame multiframe.
5. What is the basic frame length and frame repetition rate for the 2048 kbit/s interface?
6. Explain the purpose of the Alarm Indication Signal (AIS) as defined for the 44 736 kbit/s signals.
7. In the 44 736 kbit/s multiframe structure, what is the general purpose of the C-bits (C11 through C73)?
8. How are Synchronization Status Messages (SSM) used in the 2048 kbit/s system, and which bits carry this information?
9. What are the two main types of signalling discussed for interfaces like the 1544 kbit/s carrying 64 kbit/s channels?
10. Describe the composition of a multiframe at the 44 736 kbit/s level in terms of M-subframes and bits.