You receive HL7 version 2.x messages via the MLLP transport protocol using the HL7 Module MLLP listener. To manage the lifecycle of the HL7 Module MLLP listener, you configure an MLLP port where Integration Server listens for requests. The MLLP port is part of the WmHL7 package functionality and is only available after you install HL7 Module and enable the WmHL7 package. When configuring an MLLP port, you can specify which Integration Server service will be invoked by the MLLP listener when it receives an HL7 message via the MLLP transport protocol.