Port network connectivity
Issue 2.1 June 2006 51
Chapter 1: Introduction
This document describes procedures for upgrades, migrations, and conversions of Avaya
telecommunications products that use the Avaya Communications Manager software
application.
● An upgrade is an installation of a newer release of software on a media server or a newer
version of firmware on a hardware component. Components include media gateways,
media modules, Ethernet switches, and programmable circuit packs.
For more information on upgrades and upgrade paths, see Upgrades
on page 63.
● A migration is a change in hardware. The types of migration include migrating a
non-Linux-based switch to a Linux-based media server, migrating a Linux-based media
server to a different Linux-based media server; and migrating a media gateway to a
different media gateway. A migration is usually accompanied by an upgrade.
For more information on migrations and migration paths, see Migrations
on page 297.
● A conversion is a change in function or mode, reliability, or connectivity of various
hardware components. Components include media servers and media gateways. A
conversion may be preceded by a migration and may include an upgrade.
For more information on conversions, see Conversions
on page 1035
Port network connectivity
Port networks are connected to each other either by an IP connection or a fiber connection.
IP connections use CAT-5 (category 5) or better Ethernet cables to connect port networks to an
IP network for the transmission of bearer (voice) traffic. Both the control traffic and the bearer
traffic are provided over the IP network.
Fiber connections are sometimes called multiconnect connections. These connections use
fiber-optic cables to connect port networks for the transmission of bearer traffic. The three types
of fiber connections are direct connect, center stage switch (CSS), and asynchronous transfer
mode (ATM).
Direct connect is a special case of fiber connection in which fiber-optic cables connect two or
three port networks without the use of a CSS or an ATM switch.
A configuration can include Internet Protocol port network connectivity (IP-PNC) and fiber port
network connectivity (fiber-PNC) port networks. Migrations and conversions can often result in
this combination of port network connectivity.
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