Multi-Tech Systems 40-01459-D0-001 - Manual (Page 29)

TCP/IP Direct Connect 23
Chapter 5. TCP/IP D IRECT C ONNECT
TCP/IP Direct Connect software included with the PCI ESCON Adapter provides
high-performance, point-to-point TCP/IP communications between a Windows server
(Windows 2000 or Windows NT 4.0) and the mainframe. TCP/IP Direct Connect
operates over Channel-to-Channel (CTC) or Multi-Path Channel Plus (MPC+) links.
TCP/IP Direct Connect is not required and does not need to be installed for TCP/IP
Passthrough for Windows NT, Communications Server, Microsoft’s Host Integration
Server or Microsoft’s SNA Server.
TCP/IP Direct Connect provides an interface compliant with the Network Driver
Interface Specification (NDIS). This allows Microsoft’s TCP/IP stack to
communicate with the ESCON adapter in the same fashion it would use to
communicate with any other network interface card (NIC). TCP/IP applications
running on the server can communicate across the ESCON adapter with peer
applications running on the IBM mainframe (Figure 5-1).
Figure 5-1. Point-to-Point TCP/IP
Further, when Windows is properly configured for IP forwarding, any client in a
TCP/IP network can gain immediate access to TCP/IP applications and/or services
running on the mainframe (Figure 5-2).
Figure 5-2. Distributed TCP/IP Applications
Application
TCP/IP
Application
TCP/IP
TCP/IP
Direct Connect
ESCON
Application
TCP/IP
TCP/IP
TCP/IP DC
Application
TCP/IP
TCP/IP
Network