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By default, all the adjustable jumpers are open. For analog alarm input jumpers, the open position corresponds to
voltage input, and the closed position corresponds to current input — see Figure 4.14. See Table 4.B for default
jumper settings and descriptions. (Default settings may be different if you ordered a special configuration
NetGuardian.)
Table 4.B.
Jumper descriptions and settings
Jumper
Description
Open
Closed
J4 Analog
1
Voltage* Current
J6 Analog
2
Voltage* Current
J9
Factory use only
N/O*
—
J10
Factory use only
N/O*
—
J5
Factory use only
N/O*
—
J3
Factory use only
N/O*
—
* Factory Default
Front and Back Panel LEDs
4.8
The front and rear panel LEDs display alarm and communication status. Table 4.C and 4.D shows the meaning of
the LED display messages.
Fig. 4.15.
Front panel LEDs
Table 4.C.
Front Panel LED status
LED
STATUS
DESCRIPTION
FA
Solid Red
Fuse has failed
Blink Red
Modem Data receive
Modem
Blink Green
Modem Data transmit
Off
No Modem carrier detected
CD
Solid Green
Modem carrier detected
Blink Red
DCP/LAN Data receive
LAN
Blink Green
DCP/LAN Data transmit
Blink Red
Receiving data from T/NG216-Dialup
Craft
Blink Green
Transmitting data to T/NG216-Dialup