MCI, which in the last century became the first major player in alternative long distance carrier is signaling the market that they are about to be a major player in VoIP, either as a wholesale carrier or a business and consumer service.
Their announcement today about raising their SLA guarantee has to be interpreted that way.
MCI is also introducing a jitter guarantee of one millisecond for U.S. traffic that will enable customers to better carry time-sensitive applications like VoIP over their networks. The new metrics are being applied across all MCI Internet Protocol (IP) services, including dedicated and remote Internet access, IP VPN Dedicated and Remote, and Internet Colocation services, at no additional cost to customers.
If I ever saw a smoke signal, this is one of them from MCI...