The invention is a system and method for processing connections. Connection identifiers are assigned to indexes and stored in corresponding index latches. When communications arrive over a particular connection, the identifier for the particular connection is provided to all of the index latches. The index latch that stores a matching connection identifier provides its associated index. The index can be used to access a memory location that houses a processing instruction for the particular connection. The invention can be used within ATM multiplexers and gateways to facilitate connection processing.