You receive ISO_8583 messages through the TCP/IP transport protocol using the Module for ISO_8583 ISO_8583 listener. To manage the lifecycle of the Module for ISO_8583 ISO_8583 listener, you configure an ISO_8583 port where Integration Server listens for requests. The ISO_8583 port is part of the WmISO8583 package functionality and is only available after you install Module for ISO_8583 and enable the WmISO8583 package. When configuring an ISO_8583 port, you can specify the Integration Server service that the ISO_8583 listener invokes when it receives an ISO_8583 message through the TCP/IP transport protocol.