nope... i used this setting for voip in ub** world . But since i swap to cambium i have to bridge the antenna and pray for the user to upgrade is router :P
the CN pilot would be good for you here, its a pretty awesome little box.
back to the post, as an alternative, if your phone box supports a vlan, you can use your CPE to strip the customers WAN traffic, let the vlan hit the customers ATA and only allow 2 macs to hit the CPE, your customer would have to use a router and one more mac is setup to hit the ATA and you'll end up with the end result your after.