There are two scenarios in which we will detect one way audio problems. If an inbound and outbound audio channel exist and:
a) The connection is established and inbound audio channel has traffic, but callstats does not receive any bytes for a certain amount of time (~5s) on the outbound audio channel.
b) Callstats has received some bytes on the outbound audio channel, but afterwards no bytes are received for some time (~5s).
Please note that if a "mute" event is detected, then the silent period will not be classified as one way audio.