As far as I am aware, our SMT/SMX UPS, depending on the firmware loaded can communicate via ModBus USB. Other than that, I cannot think of any possible solution that we can offer you but let's wait for other members of the community.
As Jon wrote the SMC model UPS uses a proprietary communications protocol (MicroLink) that replaced the older UPSLink protocol. The SMC UPS does offer basic USB connectivity. If you are experienced with programing for USB you will find information on connecting the UPS in this white paper.