After updating my Q2686 to newest R184.108.40.206 I found that Status Reports are not now interpreted with our software.
Look at the example:
old PDU format
new PDU format
As you see, now there is no zeroes at the beggining of PDU, which should show us that there is no SMSC information. This is critical - how should we know that we should skip this C634 stuff?
PS: also tested with R7.42 and R7.40. R7.40 does not contain this bug. R7.42 does.