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Intermate100 and Intermate101 Print Server Administration Manual 123
Processing Facilities: Processing Layers
17.4. Processing Layers
Print jobs sent to the printer are processed in several layers by
the Intermate1xx before the actual printing occurs.
Figure 7. Processing layers. Read from left to right.
When the job starts, a print handler is started as an instance of
the print server, i.e. the Intermate1xx. A process is started
which “carries” the job through the various layers. The protocol
from the print client to the print handler is the one specified in
the service.
The print handler asks the printer request system to give the
job exclusive rights to use the specified target printer. It makes
sure that the job waits until its turn in the print queue and keeps
the following jobs at bay until it is their turn.
HPO stands for Host Print Option. The HPO emulator is used
when the service is an IPDS, TN5250E, or TN3270E host-ses-
sion.
In release levels 2111 and higher it is possible to direct print to
a target printer without having to go through the logical layer.
When you configure a service on older models, you must
always tell it which logical printer to use. In turn, each logical
printer redirects the job to a target printer (or to one pool of tar-
get printers (enabled under NDO)).
Print Client
Printer request
system
Logical
Printer
Target Printer
(physical)
Print Handler
HPO
Emulator
Service Protocol
Input Control
Output Control