GSM/GPRS Module Series
M35 User Manual
M35_User_Manual Confidential / Released 58 / 85
RI
Idle Calling
On-hook
Talking
HIGH
LOW
Idle
Figure 37: RI Behavior as a Caller
RI
Idle or
Talking
URC or
SMS received
HIGH
LOW
120ms
Figure 38: RI Behavior of URC or SMS Received
3.12. Network Status Indication
The NETLIGHT signal can be used to drive a network status indicator LED. The working state of this pin
is listed in the following table.
Table 19: Working State of the NETLIGHT
The module is not running.
The module is not synchronized with network.
The module is synchronized with network.
The GPRS data transmission after dialing the PPP connection.
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