I have an openwrt with RG500Q-EA on it, I flashed firmware R11A06 on it, but he works fine, but he can’t dial up, I looked at the openwrt kernel logs and it shows that he keeps dropping and reconnecting, and when I turn off the dialing program, it also drops and reconnects when I send an AT less than 3 times or for 3 to 10 seconds, how can I fix this?
Is the power supply to the modem adequate?
Yes I am using a 125V5A power supply！
If that’s 2A into a router, with that router supplying a portion of that current to the modem, then you may not have enough power at the modem.
I don’t think that’s likely. One of the prototypes had one of these
echo "ATI" | socat - /dev/ttyUSB2,crnl
You should also drop the “\n” character from your AT commands. It’s not part of AT command syntax.
Unable to use this command and using the dial-up software module reboots, I am now trying to replace the module to verify that it is working
You may need to install socat.
Most modem spontaneous reset/reboot/hangup problems on getting a connection are caused by inadequate power supply.
Here signal levels are critical. The modem’s transmit power amplifier is a major current drain.