My product uses a MC7750 running on Linux 2.6 kernel, connected to the Verizon commercial LTE network in the US. What we are experiencing, seemingly on both 1.0.9 firmware and 126.96.36.199 firmware, is that sometimes after sitting idle for 10 minutes or more, the unit disconnects from the Verizon network. We have not seen this behavior before in other modules or other networks.
If we are transmitting data continuously through that time, we don’t seem to have the issue.
I see that the MC7750 does not seem to have a built-in connection watchdog and see some evidence that other modules based on other chipsets do. I was curious about anyone else’s experience with the MC7750 and disconnects: is there some sleep or power setting I am overlooking? Are you experiencing similar problems? Is a software-based connection watchdog advisable or always required? Etc.
Any information is greatly appreciated!