I have the following strange situation:
I have a data connection with my APN and polling the module over another cmux channel for the signal quality etc. However it sometimes happen (seen it twice in two days) that it keeps reporting the same values over and over again, even if I disconnect the antenna in which case it actually should lose network registration. The module also does not report network registration lost -> However I’m unable to ping the device starting from this point.
Currently my only solution for this, is to reset the system…
firmware version: RHL769x.2.27.183100.201809071813.x7120m_3
...
13:33:28 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:33:28 (GSM, INFO) CSQ: 23
13:33:38 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:33:38 (GSM, INFO) CSQ: 23
13:33:48 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:33:48 (GSM, INFO) CSQ: 23
13:33:58 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:33:58 (GSM, INFO) CSQ: 23
13:34:08 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:34:08 (GSM, INFO) CSQ: 23
13:34:18 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:34:18 (GSM, INFO) CSQ: 23
13:34:28 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:34:28 (GSM, INFO) CSQ: 23
13:34:38 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:34:38 (GSM, INFO) CSQ: 23
13:34:48 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
13:34:48 (GSM, INFO) CSQ: 23
13:34:58 (GSM, INFO) KBND: 0002 - GSM 900 MHz and E-GSM
....