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PAD Ser vices

Remote PAD Printer Support (x29printd)

Chapter 6140

Figure 6-5 Remote Printer Support

When x29printd begins execution, it examines the /etc/x25/x29hosts

file for all PAD devices configured with a PAD type printer. For each of

these configured devices, x29printd monitors all print requests sent to

the spooling system (see Appendix B, X.25 Configuration Files and

Examples, for an example of the x29hosts file).

When x29printd detects a print request, it establishes an SVC with the

remote PAD printer specified in the remote X.121 address. x29printd

then transmits the print data to the remote PAD printer, closes the SVC,

and waits for another print request.

System Requirements

Because each printing device requires system resources, HP recommends

that the kernel parameters be set to following values (or greater):

• MAX_PAD_PR – is the number of PAD printers to be configured.

• NPTY – is 60 + MAX_PAD_PR

• MAXURPC – is 50 + (3 x MAX_PAD_PR)

• NPROC – is 20 + ((8 x MAXUSERS) + NGCSP + (6 x MAX_PAD_PR))

PAD

HP 9000

Packet-Switching

Network

X.25

Level III

Pseudo-

terminal

drivers

(PTYs)

Kernel

User Level

BSD Sockets

x29printd

LP Spooler

or other

Spooler

Printer

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HP CommonIO Products Bedienungsanleitung Seite 140