Nortel Meridian 1 Description, Installation And Operation page 70

Page 70 of 262 IP Telecommuter Engineering Guidelines
553-3001-119 Standard 2.00 April 2000
In order to offer good voice quality, the technician should keep the network
σ operating region within a "Good" or "Excellent" QoS level.
.
Mean
If the expected QoS levels of some or all routes fall short of being "Good",
the technician will need to evaluate the options and costs for upgrading the
intranet. Using Table 6 data, the technician can estimate the amount of
one-way delay or percentage packet loss that needs to be reduced to raise the
QoS level.
If the decision is to keep costs down, and accept a "Fair" QoS level for a
particular route, the technician will need to closely monitor the QoS level,
reset expectations with the end users, and be receptive to user feedback to
make changes.