Alcatel-Lucent 1643 AMS Applications And Planning Manual page 297

Glossary
IEEE
Institute of Electrical and Electronic Engineers
IF
Intermediate Frequency
IFT
InterFace Terminal
Integrated Transport Management Craft Interface Terminal (ITM-CIT)
Local manager for SDH network elements in a subnetwork. Also called the to as Craft
Interface Terminal.
Intelligent Synchronous Multiplexer (ISM)
A network multiplexer that is designed to flexibly multiplex plesiochronous and STM-1
tributary port signals into STM-1 or STM-4 line port signals.
Intermediate System (IS)
A system that routes/relays management information. An SDH network element may be a
combined Intermediate and end system.
IPS
Inter Processor Status
IS
In-Service
IS-IS Routing
The network elements in a management network, route packets (data) between each other
using an IS-IS level protocol. The size of a network that is running IS-IS Level 1 is
limited, and therefore certain mechanisms are employed to facilitate the management of
larger networks. For STATIC ROUTING, it is possible to disable the protocol over the
LAN connections and thereby effectively cause the management network to be
partitioned into separate IS-IS Level 1 areas. In order for the Lucent OMS to
communicate with a specific network element in one of these areas, the Lucent OMS
must identify the Gateway network element through which this specific network element
is connected to the LAN. All packets to this specific network element are routed directly
to the Gateway network element by the Lucent OMS, before being re-routed (if
necessary) within the Level 1 area. For DYNAMIC ROUTING an IS-IS Level 2 routing
protocol is used that allows a number of Level 1 areas to interwork. The network
elements that connect an IS-IS area to another area are set to run the IS-IS Level 2
protocol within the network element and on the connection to other network elements.
Packets can now be routed between IS-IS areas and the Lucent OMS does not have to
identify the Gateway network elements.
ISDN
Integrated Services Digital Network
ISO
International Standards Organisation
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365-312-801R7.2
Issue 3, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
GL-13