HP 3000 Manuals HP 3000 Manuals
X.400 Components The following section identifies the components associated with the HP X.400 product. Decoder The decoder takes messages from the Output Queue(s) (OQs) belonging to the client HP X.400/HP Desk Node(s) and decodes them into Interchange Format files. These files are placed in the corresponding Decoder Output Queue (DOQ) for delivery to the HP X.400/HP Desk Node. Elm/Mailx Elm and mailx are the interactive message processing systems for the HP-UX environment. Elm and mailx send and receive messages using the UNIX program Sendmail. Encoder The encoder accepts messages in Interchange Format from one of the HP X.400/HP Desk Node's Encoder Input Queues (EIQs) and encodes them into ASN.1 MPDUs. These MPDUs are placed in the Input Queue (IQ) for processing by the MTA. HP DeskManager HP DeskManager allows the user to exchange mail between HP Desk and the HP X.400 product using HP Desk. HP OpenMail/X.400 Interface The HP OpenMail/X.400 interface passes messages for X.400 users from HP OpenMail to the X.400 MTA for delivery. It also receives messages from HP OpenMail users. HP X.400/HP Desk HP X.400/HP Desk is located on the HP X.400/HP Desk Node and connects HP DeskManager to the X.400 server. It translates HP DeskManager messages into Interchange Format files and transfers them to the Encoder Input Queue (EIQ) belonging to the HP X.400/HP Desk Node, using the Network File Transfer (NFT) service. It also receives Interchange Format files from the X.400 server and translates them into HP DeskManager messages. Message Transfer Agent (MTA) The MTA is a background networking process that monitors the outgoing and incoming queues. The Output Queue (OQ) contains entries for messages which are destined for adjacent MTAs. The Input Queue (IQ) contains entries for messages received from adjacent MTAs via the Reliable Transfer Server (RTS). The MTA also routes X.400 messages and generates delivery/nondelivery reports, if requested, to be sent back to the message originator . NS 3000 NS 3000 allows communication with other HP NS systems. NS 3000 is used with HP Desk. The NS Network File Transfer (NFT) service is used to transfer messages between the HP X.400/HP Desk Nodes and X.400. NS/9000 NS/9000 allows communication with other NS systems. The NS Network File Transfer (NFT) service is used to transfer messages between the HP X.400/HP Desk Nodes and X.400. HP OpenMail HP OpenMail is an X.400 standard-based UNIX mail server that enables users to communicate on private and public mailing systems. OSI Transport Services The OSI Transport Services (OTS) provides the interface to Layers 4 and 5 of the OSI model. OTS supports Basic Activity Subset (BAS) defined by CCITT X.215, X.225, Transport Class 0, Transport Class 2, and Transport Class 4 over X.25, and Transport Class 4 over LAN. Reliable Transfer Server (RTS) The RTS is responsible for reliably transferring Application Protocol Data Units (PDUs) between its user entities and their peers on other systems. It provides a reliable transfer mechanism for transferring messages to/from the MTA that it is serving and to/from target MTAs on other systems. It is responsible for opening and closing session connections and transferring the messages over those connections. Sendmail Sendmail performs internetwork forwarding to deliver messages to their destination. Sendmail sends a message to one or more recipients, routing the message over the necessary networks. X.25 X.25 is a CCITT international network protocol for both public and private networks. X.25 is a level 3 packet switching network. X4mailer X4mailer is designed to accept messages from the UNIX program Sendmail for submission into the X.400 network, and to receive incoming X.400 messages. X4mailer acts as a bridge between the UNIX mail and the X.400 domain. X4xfer X4xfer transfers Interchange Format files created by the decoder from the Decoder Output Queues (DOQs) to the corresponding HP X.400/HP Desk Node using the Network File Transfer (NFT) service.