CTI Products EXB-232 Asynchronous Serial System Extender - Manual (Page 6)

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2
The second type of EXB module is the EXB-Serial Module. This module interfaces with a
virtual RS-232 communications channel (such as a high speed fractional T1 circuit). Figure 2
shows an example system using the EXB-Serial modules to connect networks in two remote
buildings.
CA-80301-100
BUILDING 1 BUILDING 2
COMPARATORS
CIB
CIB
IIB
IIB
CONSOLE
ELECTRONICS
1
T
P/S
T
IN
IN
OUT
OUT
P/S
EXB
IN
OUT
IN
OUT
T T
OUT
IN
OUT
IN
EXB
2
CONSOLE
VIRTUAL
RS-232
CHANNEL
Figure 2 MCN modules in two buildings connected with EXB-Serial Modules
EXB modules are used when two multi-node MCN networks are separated by a distance beyond
the reach of conventional wired media (typically 4000 feet). This distance could be across a
large building, business campus, city, etc. Additional networks can be added to this unified
network by simply adding an EXB module pair per network.
The EXB module is identified by the model number found on the rear panel of the module. The
table below shows the model numbers and the type of EXB it represents.
Model Number EXB Type
S1-60603 EXB-TELCO 1.25 Mbps Network
S1-60602 EXB-TELCO 78 Kbps Network
S1-60656 EXB-Serial 1.25 Mbps Network
S1-60655 EXB-Serial 78 Kbps Network
Throughout this manual, any reference to an EXB module includes both the EXB-TELCO and
the EXB-Serial modules.
1.1 Reference Documents
1. Monitoring and Control Network Comparator Display System Manual
Part Number S2-60425