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LTE Module Series
EC25 Hardware Design
EC25_Hardware_Design 63 / 112
Figure 27: Reference Circuits of STATUS
3.17. Behaviors of RI
AT+QCFG="risignaltype","physical" command can be used to configure RI behavior.
No matter on which port URC is presented, URC will trigger the behavior of RI pin.
URC can be outputted from UART port, USB AT port and USB modem port through configuration via
AT+QURCCFG command. The default port is USB AT port.
In addition, RI behavior can be configured flexibly. The default behavior of the RI is shown as below.
Table 21: Behavior of RI
The RI behavior can be changed by AT+QCFG="urc/ri/ring" command. Please refer to document [2]
for details.
State Response
Idle RI keeps at high level
URC RI outputs 120ms low pulse when a new URC returns
NOTE