Set Qos Expectations - Nortel 1000 Description, Installation And Operation Manual

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Set QoS expectations

Figure 27
Relationship between users and services
- Fallback threshold
- Codec
- Payload size
Deliver voice/fax
service
User oriented QoS
- Roundtrip conversation delay
- Clipping and dropout
- Audio level
- Echo
553-3001-363 Standard 2.00
ITG engineering guidelines
The users of corporate voice and data services expect these services to meet
some perceived QoS, which in turn influences network design. The goal is to
design and allocate enough resources in the network to meet users' needs.
QoS metrics or parameters are what quantifies the needs of the "user" of the
"service".
In the context of a Meridian 1/CS 1000M system with IP Trunk 3.01 (and
later), Figure 27 shows the relationship between users and services.
Delay variation
IP Trunk parameters
IP Trunk
Meridian 1
September 2004
- Silence suppression threshold
- Echo cancellor tail delay size
- Audio gain
Deliver IP service
Network QoS metrics
- One way delay
- Packet loss
-
Jitter
Corporate intranet
55 3- 917 9