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Quectel UC20

Quectel UC20
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UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 28 / 32
4 Operation of UMTS&LTE Module
4.1. Power On
1. Connect the UMTS&LTE module to the connector J101 on UMTS&LTE EVB, charge with the 5V
power adapter or USB cable and then pull S201 to ON state, then D103 will be light.
2. Press the S302 (PWRKEY) for at least 100ms. The module will be in the power-on mode and D101
(STATUS) will be light.
The follow tables show the modules working state which can be judged by D102 and D104.
Table 12: UMTS&LTE Module Indication of D102 and D104
The indication of D102 and D104 varies in different modules. Please refer to related Hardware Design for
detailed information.
Reference
State
Description
D102
NET_STATUS
0.2s On/1.8s OFF
Network searching
1.8s On/0.2s OFF
Idle mode
0.125s On/0.125s OFF
Data transfer is ongoing with GSM/3G/4G network
Always ON
Voice calling
D104
NET_MODE
Always ON
Registered to 3G network (UC20)
Registered to 4G network (EC20)
Always OFF
Others
NOTE
Quectel
Confidential

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