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90 ITG engineering guidelines

IP Trunk 3.01 (and later) is targeted towards the Enterprise customer who

has a Meridian 1/CS 1000M system installed for providing corporate voice

services and an intranet for corporate data services. A customer is expected

to use the IP Trunk 3.01 system to move trafﬁc from a PSTN-based network

to the intranet. Voice and fax services which depended on circuit-switched

and Time Division Multiplexing (TDM) technology are transported using

packet-switched and statistical multiplexing technology.

This chapter provides guidelines for designing a network of IP Trunk 3.01

(and later) nodes over the corporate intranet. It describes how to qualify the

corporate intranet to support an IP Trunk 3.01 (and later) network and how

to determine changes required to maintain the quality of voice services

when moving those services from the PSTN. It addresses requirements for

the successful integration with the customer’s existing LAN. By following

these guidelines, the IP Trunk 3.01 (and later) network can be designed

so that the cost and quality tradeoff is at best imperceptible and at worst

within a calculated tolerance.

Pre-installation analysis of the data network enables IP Tr unk 3.0 (and later)

to be provisioned correctly. For proper analysis and deployment, obtain a

network diagram or a description of the network topology and hierarchy.

Nortel recommends using a data network analyzer (for example, Sniffer

)

for evaluation and troubleshooting.

Audience

This chapter is intended for telecom and datacom engineers who design and

install the IP Trunk 3.01 (and later) node portion of the VoIP network. It is

assumed that the telecom engineer is familiar with engineering the Meridian

1/CS 1000 system and obtaining system voice and fax trafﬁc statistics. It is

assumed that the datacom engineer is familiar with the intranet architecture,

LAN installations, tools for collecting and analyzing data network statistics,

and data network management systems.

For information on designing a Meridian 1/ CS 1000 network, refer to the

following NTP:

•

Meridian 1 Small System Planning and Engineering (NN43011-220)

•

Communication Server 1000M and Meridian 1 Large System Planning

and Engineering (NN43021-220)

•

Communication Server 1000E Planning and Engineering (NN43041-220)

Equipment requirements

The IP Trunk 3.01 (and later) system was designed for operation on a

well-provisioned, stable LAN. Delay, delay variation or jitter, and packet loss

must be minimized end-to-end across the LAN and WAN. The design and

conﬁguration of the LAN and WAN that link the IP Trunk 3.01 (and later)

Nortel Communication Server 1000

IP Trunk Fundamentals

NN43001-563 02.01 Standard

Release 5.5 21 December 2007