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252 Gateway and Gateway 4 Manual v1.2
© Tieline Research Pty. Ltd. 2021
Jitter Buffer Settings and Relationship of Latency
and Packet Loss
Least Delay: This setting attempts to reduce the jitter buffer to the lowest possible point, while still
trying to capture the majority of data packets and keep audio quality at a high level. This setting is
the most aggressive in adapting to prevailing conditions, so the jitter buffer may vary more quickly
than with the other settings. It is not recommended in situations where jitter variation is significant,
or occurs in bursts. (E.g. cellular/multi-user wireless networks). It is best for stable and reliable links
such as dedicated or lightly-loaded WAN/LANs.
Less Delay : This setting lies between "Best Compromise" and "Least Delay". It may assist in
reducing latency over a connection without incurring packet loss.
Best Compromise: This default setting is the midpoint between the jitter buffer settings applicable
for "Highest Quality" and "Least Delay." It is designed to provide the safest level of good audio
quality without introducing too much latency. In most situations it will deliver very high quality and
low delay to support live bidirectional communications over cellular and wireless networks.
Good Quality: This setting lies between "Best Compromise" and "Highest Quality." It may assist in
achieving higher quality connections without incurring extreme delays in transmission or significant
packet loss.
Highest Quality: This setting is the most conservative in terms of adapting to prevailing network
conditions to reduce delay. The jitter-buffer will remain higher for a longer period after a jitter spike is
detected – just in case there are more spikes to follow. This setting is best to use where audio
quality is the most important factor and delay is not as critical. Unless delay is irrelevant, this
setting is not recommended over peaky jitter networks (e.g. cellular networks) and is best used on
more stable networks where fluctuating jitter bursts are not common.
Jitter Depth
The jitter Depth setting allows you to select predetermined minimum and maximum jitter settings
within the auto jitter buffer's minimum and maximum jitter limitations. The default setting of 60 to
1000ms is a good starting point for most networks. It may be necessary to increase the maximum
auto jitter latency setting for networks experiencing higher packet latency, or the minimum depth
depending on the reliability of the network.