HT G11 / G12 GSM Terminal Instruction Manual
7
1.4 LED Descriptions
1.
4 level LED
:
It indicates GSM signal quality. If all 4 are on, it has the
best signal. If a single LED or none is on, it is recommended to amplify
the signal with a wired antenna (ANT 03 or ANT 07).
2.
When the LED is steady, it indicates the server connection has been
established. When it is flashing, it is attempting to establish a connection.
3.
No server connection is established.
4.
The SIM card is not inserted, or the PIN code is not cancelled.
5.
It indicates a communication problem in RS-485 line.
6.
A query is sent from the terminal via RS-485 port.
7.
A response comes to the terminal from RS-485 port.
8.
It indicates a communication problem in Optical/RS-232 line.
9.
A query is sent from the terminal via optical/RS-232 channel.
10.
A response comes to the terminal from optical/RS-232 channel.
11.
Power LED:
It indicates whether there is power or not in the device.
