Nortel Remote Office 9150 Installation And Administration Manual page 425

March 2000
Relationship between users and services
Delay variation
The Remote Office node monitors the intranet's QoS. The transition threshold
parameter on the Remote Office node then dictates the minimum QoS level of
the Remote Office network. Note that the transition threshold is set on a per
site-pair basis.
The QoS level is a user-oriented QoS metric and takes on one of ten settings,
which indicates the quality of voice service. Remote Office periodically
calculates the prevailing QoS level per site-pair based on its measurement of
one-way delay
packet loss
codec
Installation and Administration Guide
Remote Office
node (MIG RLC or
unit at remote site)
Deliver voice/fax service
User-oriented QoS
- Round trip
conversation delay
- Clipping and dropout
- Audio level
- Echo
Remote Office
parameters
- QoS transition threshold
- Codec
- Payload size
Network engineering guidelines
Corporate
WAN
Deliver IP service
Network QoS metrics
- One way delay
- Packet loss
- Jitter
Remote Office
parameters
- Silence suppression
threshold
- Echo cancellor tail
delay size
- Audio gain
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