I am posting this because I want to share my experience with ghl and customers.....
Tonight, I noticed the red gsm light was flashing fast again indicating no signal....also the yellow light for pab was blinking once every second or half second consistently....which is strange because it usually blinks a lot and randomly, much like the lights on Ethernet/gigabit ports....
I tried to send out messages from module when it was like this but nothing happened, meaning there is actually an issue, not just lights....I powered off the SMS and then back on again and now everything is fine.....nothing else seemed affected.

I am running p3 with my pab chain as follows starting with p3
P3
SMS Module
Profilux Touch
Powerbar
Expansion Box
Powerbar

Any input is welcomed!


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