User's Manual

GSM/GPRS/GNSS Module Series
MC20 Hardware Design
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3.11. 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 23: Working State of the NETLIGHT
A reference circuit is shown as below.
Figure 36: Reference Design for 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 GPRS data transmission after dialing the PPP connection.