2.1.5.2. Jitter Buffer Modes 
The jitter buffer of the gateways HG 3500/3575 can be operated in
two different modes, depending on the connection:
- Static jitter buffer
- adaptive (dynamic) jitter buffer
The adaptive jitter buffer is designed specifically for voice transmission.
While the average packet delay remains constant in static mode, it automatically
adapts to the situation in adaptive mode. Figure 5 Difference between static and adaptive jitter buffer
illustrates the difference between static and adaptive jitter buffers
in a situation where several packets with longer delays arrive.
In the adaptive jitter buffer, the average delay is simply the start
value for the average delay. This is automatically adjusted to the respective
receive ratios during operation (green line).
Figure 5. Difference between static and adaptive jitter buffer
