In the order of a few mSec. Network delay 50 mSec Depends on network load. Jitter Quantifies the effects of network delays on packet arrivals at the receiver. Packets transmitted at equal intervals from the left gateway arrive at the right gatway at irregular intervals.
Excessive jitter makes speech choppy and difficult to understand.
Jitter is calculated based on the inter-arrival time of successive packets. Typically occurs either in bursts or periodically due to a consistantly congested network. Occassional bursts of packet loss can also make conversation difficult. Click on diagram to view close-up Sequence Errors Congestion in packet switched networks can cause packets to take different routes to reach the same destination. Packets may arrive out of order resulting in garbled speech.