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6287 ULTRA Users ManualPage xxii
IBM Host Considerations
The ULTRA connects directly to the establishment controller through an
IBM category A device adapter. The port designation for the ULTRA must
be configured for a category A device, not as the system printer.
The ULTRA must be defined to the system as a 3287 printer with a
maximum 4K physical buffer size (and/or with other features required by
the system and supported by the ULTRA).
Host parameters must match what the host expects on the channel to which
the ULTRA is attached. The defaults are as follows:
4K physical buffer size with no EAB support
3440 bytes/buffer logical buffer size
If using SCS data streams, the ULTRA must be defined to the host as an
SNA type 1 logical unit (LU1).
If using DSC data streams, the ULTRA must be defined to the host as a
type 3 logical unit (LU3).
If using a VTAM or another Network Control Program, the ULTRA must
be defined as a type 2 physical unit.
Printer/Controller Configuration
The ULTRA provides all of the necessary functions normally provided by
the operator switches of an IBM 3287. However, practical application of
industry-standard printers does not allow a one-to-one correspondence in
functions. It is accordingly expected that any particular printer/controller
configuration will be a subset of the IBM 3287 function set.