CGU 04i DESCRIPTION
10
2.6. Module status indication
There are two LED indicators on the front panel informing on its status.
Colour Description
Description
GREEN
PWR
Flashes once a sec………..….proper function
Lights permanently……….…...fault
Off…………………………...….no DC supply or sleep mode
RED
GPRS
Lights permanently…………...neither serial established
Flashes rapidly……………......serial connection being established,
Flashes slowly………….……..serial connection established
Flashes together with PWR….station activation failed
Inverse flashing to PWR……..no DNS connection
Off………………………….......GSM GPRS communication established
Flashes dimly…………….…...GPRS transmission or reception
z
Serial connection
– Establishment connection in face of GSM network at the level AT
commands.
z
Station activation
– Modem authentication in global DNS, reference
[1]
.
z
DNS connection
– Establishment connection with distributed database for interface
address translation to IP address.
z
GPRS
– General Packet Radio Services is transfer technology, which it work on co-
called „transfer data packet“, when the GPRS simply make use of free space
(space=slot) in GSM network.
