V5.2 signalling

Hi dears .
I need freepbx channel driver for v5.2 on dahdi/zaptel E1 interfaces.
V5.2,SS7,PRI is a Telecommunication protocol for connecting Access Network(ONU) to TDM Local Exchanges with E1. freepbx support ss7 and pri but no support V5.2?

I think it can not support V 5.2 so far.