Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
79
Safety precautions
Before delivery, the DMX50 modem is tested at the factory for operation and
safety. The following safety precautions, however, must be taken into
account:
WARNING
Open data lines can have a static charge. Handle the
connection wires especially carefully, do not touch them
during a thunderstorm. The existing voltages can be
dangerous.
LED Indicators
The DMX50 Modem features the following front panel LED indicators:
STATUS Modem operation status; blinking when the processor is
active
RI Ring Indicator
LINE Indicates that the modem is online (off-hook)
CD Carrier Detection (is ON, when the carrier signal is received)
TXD Transmitted Data
RXD Received Data
SPEED Indicates that modem line speed is 2400 bits/sec (blank when
300 to 1200 bits/sec)
MR Modem Ready; blinking once per sec when Test Mode is
active
Connector layout
8-pin RS232C connector:
DSR Data Set Ready
DTR Data Terminal Ready
CD Carrier Detection
RTS Request to Send
CTS Clear to Send
TXD Transmitted Data
RXD Received Data
GND Ground
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