MLB-G1101 DTU User Guide
16
Rev 1.1
The table describes LED function.
Item
Description
Function
1
Power
Power on indication
2
3G
3G status indication
3
Ready
Function working indication
4
Fault
Occur error
5
Net
Bulid connection
6
SIMerr
Sim card error indication
7
Tx
Uart transmit indication
8
Rx
Uart Receive indication
Table 6: LED functions of MLB-G1101
3.4 SIM card holder
In the bottom, The MLB-G1101 DTU is provided with a SIM card reader designed for 1.8V and 3V SIM
cards. It is the flip-up type which can be locked. It can be accessed through removing the battery cover
as shown below.
Figure 6: SIM Card Holder for MLB-G1101
*
Be sure to power off the modem when you replace the SIM card. Otherwise it may cause
damage to the equipment.
The MLB-G1101 fully operates when inserting a SIM card. Some MLB-G1101 functionality may be lost
if you try to operate the DTU without a SIM card