Lucent Technologies 555-233-115 User Manual

Page of 502
DEFINITY Enterprise Communications Server Release 8.2
Upgrades and Additions for R8r  
555-233-115  
Issue 1
April 2000
Glossary and Abbreviations 
GL-25
 
H12
An ISDN information transfer rate for 1920-kbps data defined by CCITT and ANSI standards.
handshaking logic
A format used to initiate a data connection between two data module devices.
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 
, and 
HNPA
See 
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 data-entry devices.
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 
.
Hz
See 
.
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 radio-controller 
circuit packs. Each interface provides communication between the radio-controller circuit pack 
and up to two wireless fixed bases. 
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.