The LA152 Has 6 ports
Port A contains 2 RJ12 six wire connectors.All six wires are connected between the 2 A ports.
Port B is a 4 wire RJ14 connector, the outer 2 wires in port A are not connected to port B
Port C contains 2 five wire DIN connectors
Port LMAB contains screw terminalsfor the 4 wires neede to connect ExpressNET.