Nortel Remote Office 9150 Installation And Administration Manual page 434

Network engineering guidelines
Fine-tuning the network Quality of Service
Topics presented in this section deal with issues that impact the QoS of Remote
Office traffic. They are informative for understanding how to fine-tune a
network to improve its QoS, but are not directly involved as a part of network
engineering procedure. These are advanced topics to help a technician fine-tune
the network to improve QoS, but they are not a part of the required procedure for
initial Remote Office network engineering.
Further network analysis
This section describes actions that could be taken to investigate the sources of
delay and error in the intranet. This and the next section discuss several
strategies for reducing one-way delay and packet loss. The key strategies are to
reduce link delay
reduce hop count
adjust jitter buffer size
implement IP QoS mechanisms
Components of delay
End-to-end delay is contributed by many delay components. The major
components of delay are
propagation delay
serialization delay
queuing delay
routing and hop count
Remote Office system delay
router processing delay
LAN segment delay
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Standard 1.0
Remote Office 9150