Glossary
GL-10
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
GR-153-CORE
General Requirements #253 Council of Registrars.
GR-1089
General Requirements #1089.
GUI
Graphical User Interface.
H
Hard reset
The physical removal and insertion of a TCC+ card, also known as reseating a card or performing a card pull.
HDLC
(High-Level Data Link Control). Bit-oriented, synchronous, data-link layer protocol developed by ISO. HDLC specifies a data
encapsulation method on synchronous serial links using frame characters and checksums.
Host number
Part of IP address used to address an individual host within the network or subnetwork.
Hot swap
The process of replacing a failed component while the rest of the system continues to function normally.
I
IEC
1.
1. InterExchange Carrier.
2. 2. International Electrotechnical Commission.
IEEE
Institute of Electrical and Electronics Engineers.
IETF
Internet Engineering Task Force.
Input alarms
Used for external sensors such as open doors, temperature sensors, flood sensors, and other environmental conditions.
I/O
Input/Output.
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