If you find bi-directional connections unstable when uploading data to your Woovebox, you can use the stability vs speed control to tradeoff throughput for stability.
And vice versa, if you have a very stable connection and wish to increase throughput, you may trade stability for increased speed.
If packet loss is detected on a bi-directional connection on firmware 3157+, this setting is automatically adjusted down in an attempt to enhance connection stability.