CTI Products EXB-IP Ethernet System Extender - Manual (Page 3)

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.
Figure 3 shows a way to monitor and control the comparators
in a Zone or Master/Slave (Sub) Comparator system. Each of
the remote sites has its comparators connected to CIB
modules on its own MCN network.
Each remote site is
connected back to the central (master) site through EXB
System Extender modules.
The master site has its Master
Comparator connected to CIB Comparator Interface Modules.
Since all the MCN networks are connected together at the
master site, the PCs there can monitor comparators at multiple
sites simultaneously. If, for instance, a wide-area channel has
3
sub-comparators, the PCs can monitor all 3 sub-
comparators and the master comparator simultaneously.
High-Speed Backbone (1.25 Mb)
The standard EXB System Extender Modules are furnished
with a standard 78 Kbps MCN network interface.
For large
multi-site systems, the EXB System Extender Module is also
available in a high-speed 1.25 Mbps network version for
increased performance at the central site. In a large system,
standard EXB System Extender Modules would be used at the
remote sites, and high-speed modules would be used at the
central site. Our engineers will help design a system to meet
your system needs.
Router Configuration & Traffic Segmentation
The EXB System Extender Modules are typically factory-
configured in repeater mode, which passes network traffic for
all MCN groups in all directions. This works well for systems
up to 16 Comparator Interface modules. In systems with EXB
System Extender Modules configured for repeater mode, all
traffic will be seen at all sites,
When systems use more than 16 comparator interface
modules, the peak network traffic can become too high for
EXB System Extender Modules in repeater mode, causing a
slow-down in display updates.
For these systems, CTI Products can custom-configure the
EXB System Extender Modules for Configured Router mode.
This allows only the messages for a certain number of MCN
groups to be passed over a particular link.
For example, in Figure 3, the pair of EXB System Extender
Modules serving Remote Site 1 could be configured to pass
traffic for the Site 1 CIB modules. Likewise, the EXBs for Site
2 would be configured to pass only traffic for only the Site 2
CIB modules. This would allow traffic from the remote CIBs to
pass to the central site, but the traffic from the site 1 would not
clog the WAN channel or the local MCN network for Site 2
(and vice versa).
T
EXB
P/S
CIB
CIB
TO LOCAL
COMPARATORS
T
P/S
CIB
CIB
CIB
T
T
P/S
CIB
CIB
CIB
T
TO COMPARATORS
TO COMPARATORS
COMPARATOR
DISPLAY
REMOTE SITE 1
REMOTE SITE N
CA-80674-100
EXB
EXB
EXB
COMPARATOR
DISPLAY
PCs WITH INTERNAL
PCLTA CARDS
T
ETHERNET CHANNEL
ETHERNET CHANNEL
Figure 3 Multiple Remote Comparator Sites combined with EXB Modules