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H12
handshaking logic
hertz (Hz)
high-reliability system
HNPA
holding time
home numbering-plan
area code (HNPA)
hop
host computer
hunt group
Hz
I1
I2
IAS
ICC
ICD
ICDOS
ICHT
An ISDN information transfer rate for 1920-kbps data defined by CCITT and ANSI
standards.
A format used to initiate a data connection between two data module devices.
A unit of frequency equal to one cycle per second.
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
control
on page 403,
duplication
critical-reliability system
See
home numbering-plan area code (HNPA)
The total length of time in minutes and seconds that a facility is used during a call.
The local area code. The area code does not have to be dialed to call numbers
within the local geographical area.
Nondirect communication between two switch communications interfaces (SCI)
where the SCI message passes automatically without intermediate processing
through one or more intermediate SCIs.
A computer, connected to a network, that processes data from data-entry devices.
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
mode
on page 386.
See
hertz (Hz)
on page 409.
The first information channel of DCP.
The second information channel of DCP.
Inter-PBX Attendant Service
Intercabinet cable or intercarrier cable
Inbound Call Director
International Customer-Dialed Operator Service
Incoming call-handling table
on page 403,
on page 398.
duplicated common
duplication option
on page 403, and
on page 409.
ACD work
Issue 1.0 May 2003
ICHT
409
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