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In the sample matrix above, the display on port 1 would have a default print ID of
03 because that is the only printer that the display is authorized to use, and it is not
a member of any class. The displays on ports 2, 3, 4, 5, and 9 would have default
ID of 71, and the display on port 6 would have default ID of 00.
The ID can be changed by the operator by using the IDENT function.
Local Copy Operation
Printer Selection
The display operator can initiate a local copy function using the PRINT key
sequence. The host application can initiate a local copy operation by sending a
write-type command to the display with the Start Print bit turned on in the WCC.
This section describes the responses to these local copy requests. The responses
depend upon the availability of printers within a selected print class. When a
selected print class contains two or more printers, and no printers are available, the
print request is queued. Printers are unavailable if they meet one of the following
criteria:
• Processing a display printout for another display
• Allocated as LU type 1 or LU type 3 and is in session with a host application, in
"in brackets" state
• Not functioning for one of the following reasons:
The printer is not physically attached to the 3708.
The printer is not powered on.
The printer is attached to a switched line and a call has not been established.
The printer is part of a display-with-printer configuration and the display is
not active in an LU type 2 protocol conversion session.
The printer is configured to be "owned" by the other SNA host. That is,
when a display is in session with host A, but the printer is defined to host B,
the display is not permitted access to the printer.
Note: The LU associated with the printer does not have to
be
active (ACTLU
does not have to
be
received) for local copies to be performed; however, the
printer must be defined to belong to an SNA host (must be included in the SNA
host's printer device list).
The print ID for a display determines how the 3708 chooses a printer to direct local
copy requests.
When a display's print ID is a class, the 3708 selects the available printer with the
lowest port number. The printer must be a member of the specified class and
authorized to accept local copy requests from the display.
When the display's print ID is a printer port number, only one printer is selected.
The print request runs on that printer when it becomes available. The display
terminal operator may connect to another authorized printer by using the IDENT
key sequence.
Chapter 4. Protocol Conversion Mode
4;.85
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