Huawei OptiX OSN 550 Configuration Manual page 454

A Glossary and Acronyms
IGMP Snooping
IMA
IMA frame
Input jitter tolerance
Intelligent power
adjusting
Interface board area
Internal cable
Internet Group
Management Protocol
Inverse Multiplexing
over ATM
IP
IP address
IP over DCC
IPA
IS-IS
ISDN
ISO
ISP
IST
ITU-T
A-16
A multicast constraint mechanism running on a layer 2 device. This protocol manages
and controls the multicast group by listening to and analyzing Internet Group
Management Protocol (IGMP) packets between hosts and Layer 3 devices. In this
manner, the spread of the multicast data on layer 2 network can be prevented efficiently.
See Inverse Multiplexing over ATM
A control unit in the IMA protocol. It is a logical frame defined as M consecutive cells,
numbered 0 to M-l, transmitted on each of the N links in an IMA group.
The maximum amplitude of sinusoidal jitter at a given jitter frequency, which, when
modulating the signal at an equipment input port, results in no more than two errored
seconds cumulative, where these errored seconds are integrated over successive 30-
second measurement intervals.
A mechanism used to reduce the optical power of all the amplifiers in an adjacent
regeneration section in the upstream to a safety level if the system detects the loss of
optical signals on the link. If the fiber is broken, the device performance degrades, or the
connector is not plugged well, the loss of optical signals may occur. With IPA,
maintenance engineers will not be hurt by the laser sent out from the slice of broken
fiber.
The area for the interface boards on the subrack.
The cables and optical fibers which are used for interconnecting electrical interfaces and
optical interfaces within the cabinet.
One of the TCP/IP protocols for managing the membership of Internet Protocol multicast
groups. It is used by IP hosts and adjacent multicast routers to establish and maintain
multicast group memberships.
A technique that involves inverse multiplexing and de-multiplexing of ATM cells in a
cyclical fashion among links grouped to form a higher bandwidth logical link whose rate
is approximately the sum of the link rates.
Internet Protocol
A 32-bit (4-byte) binary digit that uniquely identifies a host (computer) connected to the
Internet for communication with other hosts in the Internet by transferring packets. An
IP address is expressed in dotted decimal notation, consisting of decimal values of its 4
bytes, separated by periods (,), for example, 127.0.0.1. The first three bytes of an IP
address identify the network to which the host is connected, and the last byte identifies
the host itself.
A technology that enables a DCC channel to carry TCP/IP protocol packets. The IP over
DCC technology provides the TCP/IP protocol without using any extra overheads or
service resources to ensure interconnection of management channels.
See Intelligent power adjusting
Intermedia System-Intermedia System
Integrated Services Digital Network
International Standard Organization
Internet Service Provider
Internal Spanning Tree
International Telecommunication Union Telecommunication Standardization
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Copyright © Huawei Technologies Co., Ltd.
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
Issue 02 (2011-06-30)