Can 660 identify Asynchronous LMI and see its data?

Yes, the 660 does count and process the data within Asynchronous LMI frames. This is a requirement to pass the Sprint/MCI standards test. We do not show Asynchronous LMI frames as a separate result in the LMI test details. We increment the received LMI frame count when we receive either a standard Synchronous or an Asynchronous LMI frame.