McDewey

There are two distinct types of delay called fixed and variable.
z Fixed delay components add directly to the overall delay on the connection.
z Variable delays arise from queuing delays in the egress trunk buffers on the serial port connected to the WAN. These buffers create variable delays, called jitter, across the network. Variable delays are handled through the de-jitter buffer at the receiving router/gateway. The de-jitter buffer is described in the De-jitter Delay (Δn) section of this document.
Figure 5-1 identifies all the fixed and variable delay sources in the network. Each source is described in detail in this document.
Figure 5-1: Delay Sources