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FIBOCOM NL668-LA Series Hardware Guide
Page 29 of 61
5.2 Network Status Indicate Interface
NL668-LA series module provides three network status indicate pins. Pin 5 is network status indicator by
default, AT commands AT+LEDCFG can switch to pin6 or pin61, table 5-4 is the pin definition.
Table 5-4 Network status indicator
PIN Name
I/O
PIN No.
Description
NET_MODE
O
5
Network status indicator (by default)
NET_STATUS
O
6
Network status indicator
STATUS
O
61
Network status indicator
5.2.1 Interface Status Description
Network status indicate pins are used to driven indicate light and describe module’s network status,
NL668-LA series module network indicates light work status description as follow table:
Table 5-5 Network indicator light work status
Mode
Module Network Indicator
Pin Status
Indicator Light Flash/Off
Status
Description
1
600ms High/600ms Low
Flash
600ms on/600ms off
No SIM card
Request SIM PIN
Registering network (T<15s)
Register network failed
2
3000ms High/75ms Low
Slow flash
3000ms on/75ms off
Standby
3
75ms High/75ms Low
Speed flash
75ms on/75ms off
Data link established
4
Low
Off
Voice call
5
High
On
Sleep
NL668-LA series module network indicates light reference design circuits shown as follows: