Xylem H-2192 - Manual (Page 14)

2.4 LED Descriptions
DTR LED:
The DTR LED indicates the data logger connected to RS-232 port is active. This LED will be on
any time the data logger is sending data to the modem, any time the modem requests data from
the data logger, and when a data connection is active.
Modem Pwr:
On the H-2191, the modem is normally turned off and the unit is in a low power mode.
Incoming calls will be detected and wake up the modem. Once the modem is awake the call can
be answered.
On the H-2192 the modem power must be on to receive a call. For the H-2192 the power can be
programmed to turn on and off and set times or based on a battery voltage, or on always.
DCD LED
This is the Data Carrier Detect signal form the modem used in the H-2191. When a data
connection is valid this LED turns on.
Link LED:
When using the H-2192 this LED indicates the status of the cell phone connection. This LED is
off if the internal modem module is powered off. This LED is on solid if the modem power is on
and the cell modem is not registered on the network. This normally only happens for a few
seconds when the modem module is first powered up. This LED will blink at a rate of once
every 2 to 3 seconds when it is registered on the network and ready for operation. If a call is
active then this LED blinks at a faster rate of about 1 a second.
DL3400 Radio Pwr LED:
The VHF or UHF radio must be powered for operation. This LED indicated the status of the
power supplied to the radio.
NOTE: The Ethernet connector has a couple of LED’s on it also, but it is not activated at this
time.
2-4 Installation
H-219X