This operation allows an NMS to request a list of the cross-connects for the specified managed element at the specified layer rates.
The operation will also return cross connections between GTPs.

Operation Exceptions:
1. INTERNAL_ERROR - Raised in case of non-specific EMS internal failure.
2. INVALID_INPUT - Raised when connectionRateList is empty or contains invalid rates.
3. NE_COMM_LOSS - Raised when communication to managed element is lost.
