CTI Products EXB-232 Asynchronous Serial System Extender - Manual (Page 10)

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2. The EXB Unit
The EXB unit contains user accessible connectors, indicators and controls to allow efficient use
of the EXB module. This section describes the function of each item. More detail of the use of
each is in section 3. See Appendix A for connector specifications and pinouts.
2.1 The EXB-TELCO Unit
CA-80080-105
1 2 3 4 5 6 7 8 ON
OPTION A
DC IN
ERR
ACT PWR NETWORK OUT IN
RSVC CSVC
AUDIO LINE CD OH
RESET
CMD
NCB NETWORK COMBINER
NETWORK
Figure 5 EXB-TELCO Module Front Panel
"DC IN" connector -- The primary power entry point for the EXB-TELCO module. See
Appendix B for electrical specifications.
"LINE" connector -- connection point for the 2/4 wire leased-line.
"AUDIO" connector -- connection point for a telephone style handset or other audio device to
make use of the simultaneous voice/data feature of the EXB-TELCO module.
"NETWORK" connector -- connection point for the MCN network. The dual RJ45 connector
designated "IN" and "OUT". These designations apply only to DC power that is passed down
unused pairs of the 4 pair network cable. The two pins carrying the network pair are straight-
through. NOTE: Previous versions of the EXB-TELCO module do not have both RJ45 and
terminal strip connectors mounted simultaneously, rather were provided with only a dual RJ45.
The two pin terminal strip connector is not used with the MCN family products.
"PWR" LED (Green) -- Indicates when power is present to the EXB-TELCO module. Flashes
if DC input to module is below minimum required voltage.
"ERR" LED (Red) -- Indicates a diagnostic error has occurred or insufficient configuration
information is present in the EXB-TELCO module.
"ACT" LED (Yellow) -- Indicates a packet has been passed by the EXB-TELCO router.
"OH" LED (Green) -- Indicates the modem is Off Hook.
"CD" LED (Yellow) -- Indicates the modem has detected carrier and completed the training
sequence with the distant modem.