SIM800H datasheet(34/73 Pages) SIMCOM

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SIM800H датащи(PDF) 34 Page - SIMCom

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4.6. RI Behaviors

Table 12: RI behaviors

State

RI response

Standby

High

Voice call

The pin is changed to low. When any of the following events occur, the pin will be changed

to high:

（

1）Establish the call

（

2）Hang up the call

Data call

The pin is changed to low. When any of the following events occur, the pin will be changed

to high:

（

1）Establish the call

（

2）Hang up the call

SMS

The pin is changed to low, and kept low for 120ms when a SMS is received. Then it is

changed to high.

URC

The pin is changed to low, and kept low for 120ms when some URCs are reported. Then it is

changed to high. For more details, please refer to document [10].

The behavior of the RI pin is shown in the following figure when the module is used as a receiver.

Figure 27: RI behaviour of voice calling as a receiver

Figure 28: RI behaviour of data calling as a receiver

SIM800H&SIM800L_Hardware Design_V2.02

2015-07-27

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