LTE-A Module  Series 
                                                            EM120R-GL&EM160R-GL Hardware Design 
EM120R-GL&EM160R-GL_Hardware_Design                                                                         48  / 79 
 
 
 
The following table shows the RF status indicated by WWAN_LED# signal. 
 
Table 18: RF Status Indications of WWAN_LED# Signal 
 
 
RF function is turned off if any of the following circumstances occurs: 
⚫  The (U)SIM card is not working.  
⚫  W_DISABLE1# signal is at low level (airplane mode enabled). 
 
3.10.4. WAKE_ON_WAN# Signal   
The WAKE_ON_WAN# signal is an open collector signal, which requires a pull-up resistor on the host. 
When a  URC returns, a 1s low level pulse signal will be outputted to wake up the host. The module 
operation status indicated by WAKE_ON_WAN# is shown as below.   
 
Table 19: State of the WAKE_ON_WAN# Signal  
 
Output a 1s low level pulse signal 
Call/SMS/Data is incoming (to wake up the host)