Data Connect DSP19.2 User Manual Page 24

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Installation
24 User’s Manual - DSP19.2 Fast Poll Modem
NOTE:
Be sure switch S1-9 is set to the ON position to enable the remote modem to
respond to remote digital loopback requests. This test is only available in fast-
poll mode at 2400 bps or higher.
Figure 2-8 shows these three loopback diagnostics.
Transmitter
Receiver
Transmitter
Receiver
RTU
Transmitter
Receiver
Transmitter
Receiver
RTU
Transmitter
Receiver
Transmitter
Receiver
RTU
Local (Host) Analog Loop Back
Remote (RTU) Digital Loop Back
Local (Host) Digital Loop Back
Leased Line
HOST
HOST
HOST
Leased Line
Leased Line
Figure 2-8. Loopback Diagnostic Modes
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