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LBI-39224
G-6
GETC
Ericsson
G
eneral
E
lectric
T
runking
C
ard – The
GETC
is a
microprocessor-controlled shelf that can be configured to perform
many different signal processing tasks for EDACS radio
communications equipment. In CEC/IMC applications, each GETC
is equipped with a 9600 baud modem that provides serial control data
communications between different radio systems.
GSC bus
G
lobal
S
erial
C
hannel
bus
– The
GSC
bus
is a high-speed serial bus
which provides packetized control data transfers between Controller
Boards in the CEC/IMC Digital Audio Switch.
hard patch
See
Causeway patch
.
hard simulselect
See
Causeway simulselect
.
HDLC
H
ighlevel
D
ata
L
ink
C
ontrol – A standard bit-oriented protocol
developed by the International Standards Organization (ISO). With
HDLC, errors are less likely to occur because control information is
always placed in the same position and specific bit patterns used for
control are much different from those used in representing data.
HSCX
H
ighlevel
S
erial
C
ommunications
C
ontroller e
X
tended – The HSCX
is an integrated circuit (IC) designed to implement high-speed
communications links using HDLC protocols and to reduce the
hardware and software overhead needed for serial synchronous
communications.
IMC
I
ntegrated
M
ultisite and
C
onsole
C
ontroller – The IMC is Ericsson's
EDACS Digital Audio Switch that routes audio, mobile data, and
Aegis data between EDACS radio systems and dispatch consoles. It
is a second generation multisite controller plus a console controller
for the C3 series consoles.
interface module
The term "CEC/IMC
interface module
" is used to refer to a subset of
hardware components within the CEC/IMC that permits it to be
connected or linked to an external device such as a dispatch console
or an EDACS radio system. Each interface module is formed by a
Controller Board and usually one or more Audio Boards. This term
replaces the term "subsystem" and it may sometimes be referred to as
a "node." Examples of CEC/IMC interface modules include: MIM,
CIM, LRIM, VMIM, and RIM.