CTI Products EXB-IP Ethernet System Extender - Manual (Page 2)

EXB System Extender Modules
EXB 2005-08
MCN, EXB, EXB-IM, EXB-232, EXB-IP & EXB-FI are trademarks of CTI Products, Inc.
Other trademarks referenced are properties of their respective owners. Specifications subject to change or improvement without notice.
Extending Comparator Status & Control Signals
Figure 1 shows a comparator system that is located in a
different building than the console equipment. Standard MCN
CIB modules connect to the comparators and IIB modules
connect to the console.
The length of the MCN network is
normally limited to 4000 feet. As shown in this diagram, a pair
of EXB System Extender Modules can greatly extend the MCN
network using Ethernet channels.
For monitoring, the CIB Comparator Interface Modules in
Building 2 accept the logic level comparator status indications
(Vote, Receive, Disable, and Fail) and send status messages
over the MCN network. The EXB System Extender Module at
Building 2 passes the status messages over the Ethernet
channel to the EXB System Extender Module at Building 1.
The EXB module at Building 1 passes the status information to
the IIB modules over the local MCN Network. The IIB modules
then convert the status messages to logic outputs for use by
the console.
For controlling, the Force-Vote and Disable control functions
from the console in Building 1 are passed through the IIB
modules, through the pair of EXB modules, and to the CIB
modules in Building 2. The CIB modules convert the control
messages to logic levels to control the comparator.
Multiple PCs Monitoring Remote Comparators
Figure 2 shows a way to connect multiple PCs to remote
comparators using a wide-area channel.
The pair of EXB
System Extender Modules extends the MCN network at the
remote site to the local site.
The remote network of CIB
Comparator Interface Modules is essentially re-created at the
local site. Multiple PCs are then connected to the local MCN
network through internal PCLTA cards. The number of PCs at
the local site is limited only by standard MCN system
limitations.
Multi-Site Comparator Networks
Zone & Master/Slave (Sub) Comparators
Many voting systems covering a large geographic area will
have comparators located at multiple sites.
In this way,
comparators for particular zones are located close to their
receivers, with the voted audio brought back to the dispatch
center on Ethernet channels.
Some statewide or citywide systems use Master-Slave (or
Sub-Comparator) systems. In these systems, the City-Wide or
State-Wide channel is broken into zones, each with its own
comparator, called Slave or Sub-Comparators.
The voted
audio from the Sub-comparators is brought back to a Master
comparator at the dispatch location. The Master comparator
then picks the best signal from the sub-comparators.
Figure 2 Multiple Local PC Displays with Remote Comparators using EXB Modules
T
EXB
T
P/S
CIB
CIB
CIB
T
TO COMPARATORS
REMOTE SITE
CA-80675-100
EXB
COMPARATOR
DISPLAY
COMPARATOR
DISPLAY
IP, Telco, etc.
PCs WITH INTERNAL
PCLTA CARDS
T
CHANNEL
CA-80672-100
COMPARATORS
CIB
CIB
IIB
IIB
CONSOLE
ELECTRONICS
1
T
P/S
T
CONSOLE
P/S
EXB
T T
BUILDING 1 BUILDING 2
EXB
2
IP, Telco, etc.
CHANNEL
Figure 2 Extending Comparator Status & Control Signals to a Console with EXB Modules Figure 1 Extending Comparator Status & Control Signals to a Console with EXB Modules