said by FiberToTheX:
No. I mean Third Party Internet Access Providers hence TPIAp
I doubt it. It is more likely that you confused cable-specific TPIA for DSL-specific GAS/GAS-FTTN. TPIA is never used to refer to DSL unless in error.
When one takes it upon themselves to apply already-known acronyms to things entirely different that were never used for them before, it only goes to promote further ignorance and confusion.