i know there is a while list of GPRS timers to change when you have VSAT link.. the “satellite” recommended values are available in the customer documentation (look for “satellite” at the main page)
otherwise, there are many other reasons, absolutely not related to VSAT link 🙂 I don’t know if you want to dig into that ?
on top of my mind, but with a very small chance of it being correct :
– GPU or anything else is frozen (try MFS/GPRS reset)
– GPRS power control is activated (try alpha = gamma_tnx = 0)
– some other feature is activated (???)
– try lowering the CS & MCS init