ITU-T G.704

Definition

ITU-T G.704 is a recommendation from the International Telecommunication Union that specifies the framing structure for synchronous digital hierarchies, particularly in the context of T1 and E1 interfaces. This standard plays a critical role in ensuring error detection and correction, which is vital for maintaining data integrity in telecommunication systems.

5 Must Know Facts For Your Next Test

1. ITU-T G.704 defines a 2.048 Mbps E1 line with a specific frame structure that includes 32 time slots, each 64 Kbps in size.
2. The standard incorporates a mechanism for error detection through the use of a cyclic redundancy check (CRC), which helps identify transmission errors.
3. G.704 is essential for the proper functioning of multiplexing techniques, allowing multiple data streams to be combined into a single transmission channel.
4. It supports both voice and data traffic, making it a versatile solution for telecommunications networks.
5. The recommendation also addresses synchronization requirements to maintain timing accuracy across different network devices.

Review Questions

• How does ITU-T G.704 facilitate error detection in digital communication systems?
  • ITU-T G.704 facilitates error detection by implementing a cyclic redundancy check (CRC) within its frame structure. This method allows the receiver to detect any errors that may have occurred during transmission by comparing the received data against the expected values calculated using CRC. By identifying errors promptly, the system can initiate corrective actions, ensuring reliable communication.
• Discuss the significance of framing in ITU-T G.704 and how it impacts synchronous digital hierarchies.
  • Framing in ITU-T G.704 is crucial because it establishes clear boundaries between different data packets, which is essential for maintaining synchronization in synchronous digital hierarchies like T1 and E1 interfaces. This well-defined structure allows multiple data streams to be organized effectively within a single channel, enhancing bandwidth utilization and ensuring that the correct time slots are allocated for each stream, thereby improving overall network efficiency.
• Evaluate the impact of ITU-T G.704 on modern telecommunications networks and its relevance in current data transmission technologies.
  • ITU-T G.704 has had a lasting impact on modern telecommunications networks by providing a robust framework for error detection and synchronization in digital communication. Its principles are still relevant today as they influence contemporary data transmission technologies such as Voice over IP (VoIP) and Integrated Services Digital Network (ISDN). The continued use of G.704's methods highlights its importance in ensuring high-quality communication standards that can accommodate the increasing demand for reliable data transfer in today's fast-paced digital environment.

Related terms

Framing: The process of delineating boundaries between different data packets or frames to ensure proper synchronization and data integrity during transmission.

Error Detection: Techniques used to identify errors that may occur during data transmission, allowing for corrective measures to be taken.

Synchronous Transmission: A method of data transmission where data is sent at regular intervals, synchronized with a clock signal to ensure proper timing.