I don't believe so. At least I can't think of anywhere to do that. I know on our Comdial systems we can.

The problem sounds like a limitation of the APs. I had a similar problem with some Zyxel Wireless Bridges. Not with VOIP, but just with data. Zyxel said they would work in this configuration, but they never did. Just like with Linksys, just because a manufacturer says something will work doesn't mean it will in every case.