Based on asnwers so far: To put things in perspective The current regulations offer unbundled COPPER loops, as well as an aggregated wholesale last mile access for DSL/VDSL (wholesale also mandated for cable for data but not voice) This may change with the CRTC 2013-551 consultation which reviews a whole bunch of stuff on "essential services" nature, and this includes discussion on whether wholesale access to FTTH served homes should be mandated. As a result, knowing if the architecture of H.248 allows multiple voice service providers to co-exist on the same GPON (one house connected to ILEC voice, the next house connected to CLEC etc) becomes important. If the protocol is such that it does not permit co-existance, then a debate on wholesale voice access is moot. If the protocol does permit it, then providing soe form of evidence (either existing implementations or pointer to specs that show this was explicitely designed into the architecture) would be of great help.