Jitter and Jitter Buffer
Jitter refers to the variation in the arrival time of voice packets. To ensure that conversations are understandable, the jitter buffer collects the packets first and then sends them to the receiver at an even pace. Sometimes though, the jitter buffer can be wrongly configured, which can result in dropped packets and low quality voice calls.
A hack that you can try here involves the dynamic jitter buffer, which is software-based and can be reconfigured. (The static jitter buffer is hardware-based.) Have your network administrator do the reconfiguration based on what you’re experiencing. Ideally, this should be set between 30 to 50 millisecond in depth.
Remember that packets are dropped when the buffer is too small. You will experience conversation gaps if this is the case. On the flip side, if the buffer is too big, you will experience increased delays in voice packet delivery.