CatDV includes no device drivers and cannot directly interact with LTO or any other tape device at a hardware level.
The integrations we speak of here are with the various software packages that control the drives. Atempo, PresSTORE and in the case of the Cache-A units, they have hardware and software in one unit.
If the Tivoli software can be accessed from a command line interface, then the CatDV worker can be scripted to hand off archive jobs to it, but this is a custom function and is usually done on a job by job basis.
Generally your integrator should be able to engage Squarebox or their own team to help you set up scripts such as this. I'll take a look and see if I can find any Tivoli documentation to see if it allows for outside control.