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MODEM MD720 in Terminal Mode
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4.2
Operating requirements in Terminal Mode: GPRS
subscriber contract
To use the MODEM MD720 in Terminal Mode it is required:
SIM card of a GSM network operator including CSD data service 9600 Bit/s
and an extra telephone number for data calls,
Availability of a GSM network.
4.3
Functions of the LEDs in Terminal Mode
The device has 3 LEDs, which indicates the current operation status:
S
(Status)
Q
(Quality)
C
(Connect)
LED
Status
Meaning
S, Q, C
combined
Fast lighting in sequence
Boot procedure
Synchronous slow blinking
Service mode
Slow lighting in sequence
Update
Synchronous fast blinking
Error
S (Status)
Blinks slowly
Device waiting for PIN input
Blinks fast
PIN error / SIM error
Q (Quality)
Blinks slowly
Booking into GSM network
1x intermittent blinking
Field strength not sufficient
2x intermittent blinking
Field strength sufficient
3x intermittent blinking
Field strength medium
ON permanently
Field strength high
OFF
Waiting for PIN input
C (Connect)
Blinks
Terminal mode active
Blinks slowly: 1 time each second
Blinks fast: 4 times each second