Intelligent Tunneling

The Gateway C112 at the host site emulates several terminals (in this example, Bisync 3270). The data is converted to TCP/IP and sent through the network to another Gateway (in this example, C112 and C110). The remote Gateway emulates a host and polls the attached ATM. The central site C112 maps the bisync 3270 address to the destination IP address of the remote Gateway. The remote C112 can use the same set of host addresses or different ones. Often times the remote Gateways are configured with the same set of addresses to simplify the installation. The remote Gateway can also use a different protocol than the central site. In this illustration, the C110 uses Visa protocol for one the attached ATM.

This approach preserves the investment in the current system during the migration to a TCP/IP environment.

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