What is the recommended minimum SNR for Voice applications for networks?

The correct answer is C. 25. SNR for Voice Applications 25 dB (Option C) is the recommended minimum Signal-to-Noise Ratio for voice applications in enterprise networks, as defined by Cisco and industry wireless standards. This threshold ensures sufficient signal clarity to maintain acceptable call quality, i

Submitted by emma.c· Mar 6, 2026Architecture

Question

Options

How the community answered

(24 responses)

A
8% (2)
C
88% (21)
D
4% (1)

Explanation

SNR for Voice Applications

25 dB (Option C) is the recommended minimum Signal-to-Noise Ratio for voice applications in enterprise networks, as defined by Cisco and industry wireless standards. This threshold ensures sufficient signal clarity to maintain acceptable call quality, intelligibility, and minimal packet loss in VoIP and wireless voice deployments.

Why the distractors are wrong:

Option A (15 dB) is far too low and would result in noisy, degraded audio that is barely usable for data applications, let alone voice
Option B (20 dB) is the typical minimum recommended for basic data applications, not voice - it lacks the headroom voice quality demands
Option D (10 dB) represents an extremely weak signal relative to noise and would produce unintelligible voice communication

Memory Tip: Think of the phrase "25 for Voice to Stay Alive" - voice applications demand the highest SNR threshold among common network applications (data = 20 dB, video streaming ≈ 25 dB, real-time voice = 25 dB minimum). The higher the sensitivity of the application, the higher the SNR required. Voice cannot tolerate noise the way file transfers can.

Topics

#SNR#Voice applications#Wireless network design#Performance metrics

Community Discussion

No community discussion yet for this question.

Full 350-401 Practice