User's Manual

LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 45 / 83
3.16. Behavior of the RI
You can use command AT+QCFG=“risignaltype”,“physical” to configure RI behavior:
No matter which port URC is presented on, URC will trigger the behavior on RI pin.
URC can be output from UART port, USB AT port and USB modem port by command AT+QURCCFG.
The default port is USB AT port.
In addition, RI behavior can be configured flexible. The default behavior of the RI is shown as below.
Table 20: Behavior of the RI
State
Response
Idle
RI keeps high level
URC
RI outputs 120ms low pulse when new URC returns
The RI behavior can be changed by command AT+QCFG=“urc/ri/ring”, refer to document [2] for
details.
NOTE