Nortel-networks NN43001-563 Manual de usuario descargar pdf (Pagina 141)

100

101

Measure intranet QoS 141

In the context of a Meridian 1/CS 1000M system with IP Trunk 3.01 (and

later), Figure 27 "Relationship between users and services" (page 141)

shows the relationship between users and services.

Figure 27

Relationship between users and services

From the diagram, it can be seen that there are two interfaces to consider:

•

The Meridian 1/CS 1000M system, including the IP Trunk 3.01 (and

later) nodes, interfaces with the end users; voice services offered by the

system must meet user-oriented QoS objectives.

•

The IP Trunk 3.01 (and later) nodes interface with the intranet; the

service provided by the intranet is "best-effort delivery of IP packets", not

"guarantee QoS for real-time voice transport." IP Trunk 3.01 (and later)

translates the QoS objectives set by the end-users into IP-or iented QoS

objectives. The guidelines call these objectives

intranet QoS objectives.

The IP Trunk 3.01 (and later) node can be enabled to monitor the intranet’s

QoS. In this mode, two parameters, the receive fallback threshold and the

transmit fallback threshold, on the IP Trunk 3.01 (and later) node dictate the

minimum QoS level of the IP Trunk 3.01 (and later) network. The fallback

thresholds are conﬁgured on a per-site pair basis.

Nortel Communication Server 1000

IP Trunk Fundamentals

NN43001-563 01.01 Standard

Release 5.0 30 May 2007

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