[VoiceOps] SIP provider that will route to free conference services

In article <D68D2C39A2B8BB45B4E6029C9E4FEB2002D248758C at MB01.hmc.corpwest.com> you write:

We have a few customers who need to reach free conference call services and none of our current carriers will route the calls. Are there any providers out there that will take these calls via SIP? We are happy to pay a fair price per minute if somebody will take it.

Works over Callcentric. R's, John