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.
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 NMS to communicate with
a specific network element in one of these areas, the NMS 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 NMS, 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 NMS does not have to identify the Gateway network elements.
ISDN
Integrated Services Digital Network
ISO
International Standards Organisation
ITU
International Telecommunications Union
ITU-R
International Telecommunications Union - Radio standardization sector. Formerly known
as CCIR: Comité Consultatif International Radio; International Radio Consultative
Committee.
Glossary
...................................................................................................................................................................................................................................
GL-12
Lucent Technologies - Proprietary
See notice on first page
365-312-847R4.0
Issue 4, November 2006