Don't confuse the SRL API (standard runtime library) used for event processing between host library and firmware communications with that of SR (system release software) in this case.
In anycase, the 6.0 software and all board based products were sold off to Sangoma last year and no longer own by dialogic. So if you were really looking to use that going forward you would have to contact them for more information.
But I suspect that is not really the case. Overall, I feel it might be worthy for you to have some conversation with a dialogic field (FAE) sales rep to get you in the right direction.
If you PM me your information i can see if that is a possibility...