Glossary and Abbreviations
hertz (Hz)
A unit of frequency equal to one cycle per second.
high-reliability system
A system having the following: two control carriers, duplicate expansion interface (EI) circuit packs in the PPN (in R5r with CSS), and duplicate switch node clock circuit packs in the switch node (SN) carriers. See also duplicated common control, duplication, duplication option, and
HNPA
See home
holding time
The total length of time in minutes and seconds that a facility is used during a call.
home numbering-plan area code (HNPA)
The local area code. The area code does not have to be dialed to call numbers within the local geographical area.
hop
Nondirect communication between two switch communications interfaces (SCI) where the SCI message passes automatically without intermediate processing through one or more intermediate SCIs.
host computer
A computer, connected to a network, that processes data from
hunt group
A group of extensions that are assigned the Station Hunting feature so that a call to a busy extension reroutes to an idle extension in the group. See also ACD work mode.
Hz
See hertz (Hz).
I
I1
The first information channel of DCP.
I2
The second information channel of DCP.
I2 Interface
A proprietary interface used for the DEFINITY Wireless Business System for the
I3 Interface
A proprietary interface used for the DEFINITY Wireless Business System for the cell antenna units. Each wireless fixed base can communicate to up to four cell antenna units.
IAS
ICC
Intercabinet cable or intercarrier cable
Issue 5 January 1998 |
