User's Manual

GSM/GPRS Module Series
M35 User Manual
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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
State
Module Function
Off
The module is not running.
64ms On/800ms Off
The module is not synchronized with network.
64ms On/2000ms Off
The module is synchronized with network.
64ms On/600ms Off
The GPRS data transmission after dialing the PPP connection.