Alternatives to SBC?

bionic-john asks: "We are a relatively small shop running 11 point-to-point T-1's carrying both voice and data. It seems weekly we have an issue, and it takes SBC at least a day from notification to resolution. To my knowledge, they are the only game in Chicago since they control all the copper which resellers just resell. The data bit is easy -- DSL with VPN, but what about the voice and central voice-mail? I have spoken with other vendors offering pseudo-VOIP using a hardware layer between their CO and our voice-switch, but it seems like the technology is still in its infancy, is not fully tested, and it's still SBC copper out the door. The strange thing with all this is, that we have just as many PRI's, and probably 1/20th of our issues involve those. It's always the point-to-point. What am I missing? What can I do?"