NT910G
User Manual - Telic AG
Pg 21
5.4.2 DISABLING THE LOW POWER MODE BY USER
▪
Set the DTR control line from Low to High.
▪
Low-power mode should be exited automatically. After sending DTR from Low to High, the
module doesn’t save power, but the module is saving power again after setting DTR from High
to Low.
▪
The RS232 transceiver is activated immediately.
▪
AT channel is available immediately after changing DTR from Low to High.
▪
Send AT command “AT+CFUN=1” to remain in normal mode.
▪
For setting the status LED back to alternate timings again send the AT command AT#SLED=4
5.4.3 DISABLING THE LOW POWER MODE UPON RECEIVING GSM ACTIVITY
▪
The terminal will be connected, in case of an incoming call
▪
DTR must be manually set to „high“ again
▪
Set RTS to “Low” and then to “High” for a working communication
▪
The device automatically jumps back to
“
AT+CFUN=1
”
when the RTS line is set high (if
disabled before) set the status LED back to alternate timings
NOTICE
The user must set DTR line to high in order to activate the RS232 transceiver, this is not done
automatically.
5.5
Operating states / green LED
The modem has a green power up LED, as depicted below, which is used to indicate various operating
states. These states are described in following table.
Default setting:
▪
Set alternate GPIO function: at#gpio=1,0,2
▪
Set alternate Timings: at#sled=4
▪
Safe configuration: at#sledsav
SLED = 2,50 Operating state of LT910 E
Terminal
green LED state
Device off
Permanently off
Net search / not registered
Fast blinking (period=1s, LEDon=0,5s)
Registered full service
Slow blinking (period=3s, LEDon=0,3s)
Low power mode activated
Permanently off
Table 7: Operating states of the green LED
