Am I supposed to be pulling up/down the RI (Ring Indicator) line of the GM862? RI appears to stay HIGH (2v8) eternally, during a phone call it stays the same (Though the modem does echo “RING” to the terminal)
I thought maybe it’s a faulty modem, but i’ve tried another to the same effect. Nothing is attached to RI at the moment, the modem is powered properly, all the lines I’ve used have proper level shifting setup (courtesy of XN04312 transistor arrays!)
Do I need to pull RI up / down, or issue an ‘AT’ init directive for it to raise/lower RI during a call?
Am I supposed to be pulling up/down the RI (Ring Indicator) line of the GM862? RI appears to stay HIGH (2v8) eternally, during a phone call it stays the same (Though the modem does echo “RING” to the terminal)
I thought maybe it’s a faulty modem, but i’ve tried another to the same effect. Nothing is attached to RI at the moment, the modem is powered properly, all the lines I’ve used have proper level shifting setup (courtesy of XN04312 transistor arrays!)
Do I need to pull RI up / down, or issue an ‘AT’ init directive for it to raise/lower RI during a call?
Many thanks in advance
The manual shows that it is an output line so no resistors should be needed to pull it to one of the rails. I would think that before the module has answered the call, that line should go low and once the module has answered it should return to high.
