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LBI-39224
G-7
Jessica PBX Gateway
Jessica
P
rivate
B
ranch e
X
change
Gateway
– This advanced
telephone interconnect system is used with CEC/IMC equipment to
provide EDACS radio system users access to local public switched
telephone networks (PSTN). Jessica incorporates the Ericsson
MD110 PBX. It is interfaced to the CEC/IMC via a PIM. (Also see
PIM
.)
LRIM
L
ogging
R
ecorder
I
nterface
M
odule – This CEC/IMC interface
module provides audio outputs for logging recorders. Each output
channel can be programmed to supply audio based on groups or
individual units within the CEC/IMC network.
message trunked call
A
message
trunked
call
is a call which is assigned a working
channel for the duration of the entire communication process, not just
a single PTT sequence. This accomplished by adding hang-time after
each PTT. Emergency and telephone interconnect calls operate in a
message trunked mode. (Also see
transmission
trunked
call
.)
MIM
M
ASTR II/III
I
nterface
M
odule – The MIM connects an EDACS
radio system to the CEC/IMC switch. EDACS radio systems include
EDACS sites, simulcast systems, CNI systems, and SCAT systems.
modem data
Modem
data
includes any system control, digital voice, or user data
transferred via modem equipment using modulated/demodulated
signals. For example, the uplink/downlink control data transferred
between the CEC/IMC location and an EDACS trunked site is
modem (control) data.
MOM
MO
nitor
M
odule – The MOM is a CEC/IMC interface module that
provides serial data connections for the CEC/IMC Manager (MOM
PC) and the System Manager computers. It also provides many
important functions for the CEC/IMC and it stores certain databases
for the CEC/IMC such as the current ("soft" or console)
patch/simulselect settings made from consoles.
MOM PC
See
CEC/IMC
Manager
.
multisite
A
multisite
is a network of multiple EDACS radio systems and
possibly conventional radio systems all linked together for wide-area
communication. In a multisite network adjacent systems do not use
the same radio frequencies.