Nortel Remote Office 9150 Installation And Administration Manual page 399

March 2000
Understanding your network
A good design of the Remote Office network must begin with an understanding
of traffic, and the underlying network that transmits the traffic. You must do the
following preliminary tasks:
1. Calculate Remote Office traffic.
You must estimate the amount of traffic that the Meridian 1 system will
route through the Remote Office network. This, in turn, places a traffic load
on the corporate intranet. This is described in "Remote Office traffic
engineering" on page 375
2. Assess wide area network (WAN) link resources.
If resources in the corporate intranet are not enough to adequately support
voice services, it is normally caused by not enough WAN resources.
"Assessing WAN link resources" on page 386 outlines how you can make
this check.
3. Measure the existing intranet's Quality of Service (QoS).
You must estimate the quality of voice service the corporate intranet can
deliver. "Measuring the intranet Quality of Service" on page 403 describes
how to measure the prevailing delay and error characteristics of an intranet.
After the assessment phase, you can design and implement the Remote Office
network. This design not only involves the Remote Office elements, but can also
require making design changes to your intranet. "Fine-tuning the network
Quality of Service" on page 408 and "Implementing Quality of Service in IP
networks" on page 416 provides guidelines for making modifications to the
intranet.
The following flowchart shows the design and planning decisions that should
take place.
Installation and Administration Guide
Network engineering guidelines
373