If you experience this phenomenon, please share your modem, router and network combination.Īt the moment, I am looking at my MikroTik dual 3G wan setup, with the 8ta E367 (steady blue indicator) and the Cell C white stick ZTE MF190 (green circular indicator flashing 2 seconds on/2 seconds off). Only way to fix has been either unplug the modem and plug it in again, or power cycle the router.
I have found that not even a soft reboot of any of the routers resolves this condition, as none of them remove USB port power to the modem on reboot.
HUAWEI MOBILE BROADBAND E173 CE0682 SERIAL
The MikroTik for example pops up a warning "modem did not respond" and attempts to send it serial commands fail. On occasion, I have had the modem indicator light remain on solid blue or cyan, but no internet communication.Īlmost all of the times this happens, the router is unable to communicate with the modem if I try to force a disconnect or reconnect. ZTE MF190 (indicator flashes slow green normally when PPP session is connected, opposite to others) So far, I have seen this happen at completely random intervals at different geographical locations, over the last few months, with the following combinations of routers, modems and networks: It's almost as if the modem gets into some state, where it does not respond to serial communications on the USB port from the router anymore. I have experienced this issue now over a variety of modems, routers and mobile networks.įor some reason the PPP session is disconnected and the modem sits with a flashing blue light, showing that it is apparently connected to the mobile network, but will not respond to the routers attempts to initiate a reconnect.