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From any desktop, over any LAN, via any IBM mainframe protocol, the DI3270 MultiProtocol Communications Server gives you end-end connectivity and control while protecting your investment in mainframe data and applications.

The DI3270 MultiProtocol Comm Server connects TCP/IP, IPX, or NetBIOS LANs to IBM mainframes. With the Communications Server running as an independent PC application, the file server is free to do its job, while the Comm Server takes care of mainframe communications. And because it supports the broadest range of host protocols, the DI3270 Comm Server simplifies the planning and installation of LAN-to-host connectivity.

IBM Mainframe Environments

Built to communicate with virtually any IBM 370-class machine, DI3270 connects to hosts running MVS/TSO, MVS/CICS, VM/CMS, and DOS/ VSE, VTAM or BTAM.

Host Communications Protocols

The DI3270 MultiProtocol Communications Server protects your investment in mainframe hardware and software by supporting the host communication protocols you have installed today: SDLC, 802.2 LLC, X.25/QLLC, SNA coax, non-SNA coax, and bisync. And DI3270 includes the network management tools you need: NetView Response Time Monitor, local communications monitor, and diagnostic trace and logging functions.

SDLC: Support for up to 253 concurrent, remote host sessions at speeds up to 128Kbps.

802.2 LLC: Support for up to 253 concurrent host sessions connected via Token Ring or Ethernet.

X.25/QLLC: Support for up to 253 host sessions via switched or permanent virtual circuits at speeds up to 72Kbps.

SNA Coax: Support for up to 40 concurrent host sessions via DI's Multiplexed Coax Adapter.

Non-SNA Coax: Support for up to 32 concurrent sessions into a non-SNA controller via DI's Multiplexed Coax Adapter.

Bisync: Support for up to 32 remote host sessions running binary synchronous protocol.

LAN Protocols

The MultiProtocol Comm Server communicates with client workstations over LANs running IPX, NetBIOS, or TCP/IP LAN protocols. So DI3270 is equally at home with NetWare, Windows NT, OS/2 or other popular LAN OS’s.

NetBIOS: Operates in LANs running IBM's NetBIOS and/or NetBeui, including Windows NT, LAN Manager, OS/2, Lantastic, and others.

IPX: Compatible with LANs running Netware 3.X or 4.X.

TCP/IP: Compatible with LANs running TCP/IP. Also, acts as a TN3270 server in LANs running TCP/IP.

Desktops

Your environment requires that a variety of machines with a variety of operating systems have access to the mainframe. That’s why the DI3270 MultiProtocol Comm Server can run as a TN3270E server to any workstation on the LAN running any TN3270 terminal or printer emulator from any vendor, supporting host access from MS-DOS, Windows, Unix, OS/2 or Macintosh desktops.

MS-DOS: Serves DOS machines on the LAN running either the DI3270 MultiProtocol Workstation or a TN3270 emulator from DI or another vendor.

Windows: Serves machines running Microsoft Windows (3.+, WFW, '95, or NT) via the DI3270 MultiProtocol Workstation or a TN3270 emulator.

OS/2: Supports OS/2 machines running the DI3270 MultiProtocol Workstation in a DOS or Windows box or any other TN3270 emulator.

Unix: Supports any Unix-compatible TN3270 emulator.

Mac: Supports Apple Macintosh machines running any TN3270 emulator.

Management Tools

NetView Support: The DI3270 Multiprotocol Comm Server supports NetView's Response Time Monitor (both local and host statistics display), NMVT alerts, Maintenance statistics (RECFMS/REQMS) and NMVT Product Set ID.

Network Monitor: DI3270's Network Monitor lets the LAN administrator examine Comm Server performance statistics, NetView alerts, SNA state, and bound applications for any Comm Server on the LAN, from any workstation. The Monitor includes a logging function for recording local device status and Comm Server diagnostic data, and permits the enabling and disabling of devices.

Diagnostic Traces: Traces communications between Comm Server and host or between Comm Server and workstation.

Auto Recovery: If a line drop occurs, DI3270 detects line restart without the need to reboot either the Comm Server or workstation machines.

Multiple Comm Server Support: Multiple DI3270 MultiProtocol Comm Servers can operate concurrently on the same LAN connected to different hosts via different protocols. Each workstation can engage in multiple concurrent sessions with different hosts via different MultiProtocol Comm Servers running different host protocols.

Load Balancing: In a multiple Comm Server environment, dynamically allocated LUs are assigned among equivalent gateways to ensure the even distribution of LUs.

Device Allocation: Each device defined at the Comm Server may be 1) dedicated, 2) dynamically assigned, or 3) dedicated to a group of workstations.

Security: Only authorized workstations are able to access a given Comm Server.

Minimum Configuration