I'm not sure that I know of any foundation software that specifically targets the telecom industry. If you use TnxTower, then you might contact Peter to see if he has any specific recommendations.
Unfortunately, my guess is that he will not. The RISA-3D program interacts with TnxTower, of course. But, that's not for foundations. Then RISAFoundation interacts with RISA-3D. Therefore, there should be a possible work flow where you go from TnxTower to RISA-3D to RISAFoundation. That should work pretty well.
I will point out, however, that RISAFoundation is more geared towards mat slab foundations than it is to caissons. It does offer pile cap analysis and code checks and such. However, the program expects you to enter in the stiffness and capacity of your piles / caissons. Therefore, you have to have a way of calculating those values on your own....