Table of Contents
Advertisement
Installing and putting a SINAUT modem into operation
6.3 GPRS/GSM wireless modem MD740-1
LED displays of the MD740-1
The following tables summarize the meaning and activity of the LEDs on the front of the
modem.
Table 6-5
Meaning of the LEDs (DC5V, STAT, LINK, VPN) on the front panel of the MD740-1
LED
Color
Status
DC5V
Green
ON
OFF
STAT
Yellow
Flashing
LINK
Yellow
ON
OFF
VPN
Yellow
ON
OFF
1) Shortly after turning on the MD740-1, the VPN LED is lit briefly although the VPN tunnel is not active. Cause: Self-test of the components
while the device boots.
Table 6-6
Meaning of the LEDs (S, Q, C) on the front panel of the MD740-1
LED
S, Q, C together
S (Status)
Q (Quality)
C (Connect)
Flashes slowly once per second; flashes fast: 4 times per second
1) During an update of the communication software, the LEDs first flash slowly in sequence. Later, only the S LED remains ON.
2) Shortly after logging in, the field strength is always signaled as minimal or unknown by the Quality LED flashing once. Cause: At this point in
time, the device has only detected that there is a field strength present. The actual calculation of the field strength takes place at the next
check after 15 seconds.
232
Meaning
Device turned on, power supply present
Device turned off, no power supply
VPN board operational
Ethernet connection to local computer or LAN established
Ethernet connection to local computer or LAN not established
VPN tunnel established
VPN tunnel not established
Status
Flash on and off in sequence
(fast)
Flash on and off in sequence
(slow)
Flash fast (in sync)
Flashes slowly
Flashes fast
OFF
ON
Flashes slowly
Flashes once at intervals
Flashes twice at intervals
Flashes three times at intervals
Always ON
OFF
OFF
ON
1)
Meaning
Booting
Update
1)
Error
Waiting for PIN input
PIN error/ SIM error
No GPRS connection
GPRS connection exists
Logging into GSM network
Field strength not adequate or unknown
Field strength adequate
Field strength good
Field strength very good
Waiting for PIN
No connection
Connection to partner (with GPRS: Authentication and IP
assignment were successful)
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
2)
Advertisement
Table of Contents
