What is the maximum one-way latency and jitter tor voice before quality issues arise?

Industry best practices and recommendations for voice quality standards, often cited by organizations like ITU-T and networking vendors like Cisco, indicate that one-way latency should ideally be kept below 150 ms and jitter below 30 ms to prevent perceptible degradation of voice quality. Exceeding these thresholds can lead to noticeable delays, echo, and choppy audio, impacting user experience.

While these values (100 ms latency, 10 ms jitter) would provide excellent voice quality, they are stricter than the generally accepted maximum thresholds before quality issues arise.

These values (300 ms latency, 60 ms jitter) are significantly too high and would almost certainly result in very poor and unacceptable voice quality, characterized by severe delays and choppy audio.

While 90 ms latency is good, 30 ms jitter is generally accepted. However, 150 ms latency is the more widely recognized maximum for one-way latency before significant issues.