Digital techniques in telecommunications: are they used? Evaluate the statement: “Telecommunications systems do not use digital techniques.” Determine whether this statement aligns with modern communication practices.

Introduction / Context:
Modern telecommunications—from cellular networks and fiber optics to Wi-Fi and satellite—relies heavily on digital modulation, coding, and switching. The statement claims the opposite; this item checks your awareness of the digital revolution in communications.

Given Data / Assumptions:

• We consider contemporary telecom systems: 4G/5G, optical transport, VoIP, WLAN, and satellite links.
• Digital techniques include modulation (QAM/PSK), error-correcting codes, packet switching, and DSP.
• Analog techniques exist historically and at certain interfaces, but the end-to-end system is dominantly digital.

Concept / Approach:
Telecom systems digitize information for robustness, compression, multiplexing, and encryption. Digital modulation and coding increase spectral efficiency and reliability. Network cores are packet-switched and IP-based. Therefore, saying telecommunications does not use digital techniques is inaccurate.

Step-by-Step Solution:

Verification / Alternative check:
Review standards (3GPP, IEEE 802.11, ITU-T); specifications are digital and packet-centric.

Why Other Options Are Wrong:

Common Pitfalls:
Assuming “RF” implies analog end-to-end; RF carries digitally modulated symbols processed by DSP.

Final Answer:
Incorrect