At the risk of being labeled as the black sheep here lol it depends on the level of geekery you're willing to undertake, BGW210-700 can be replaced, of course but it does take some work, at&t uses certificate authentication on the payload vlan so one must extract the certificate out of BGW210-700 and implant it into whatever replacement box they wish, that's a lot of work compared to the bridge option. AT&T's architecture decision, imho is inferior to Sonic's and it has to do how they chose to deliver the voice piece. Sonic does that at ONT while at&t does it at the router hence the need to make sure nobody can kick their router off.. I think Sonic did their homework well, many U.S. GPON deployments follow the same principle - voice at ONT so good work guys! Keep it simple and of course - those on Sonic's native GPON plant are one notch above the re-sale customers LOL that's how it should be!