The Question is:
How and/or what is the best way to send PCL commands to printers?
The Answer is :
Via telegraph, telephone, stenographer and courier, network, dog sled,
signal flags, or whatever appropriate communications mechanism is
available? (And never underestimate the bandwidth of a truckload of
DVD+R disks -- the latency isn't so good, but the bandwidth is huge.)
If you wish to see an example of PCL commands and particularly the use
of the device control library mechanism that are available within the
OpenVMS printing environment, please see topics (1020), (2771), and
(5271) here in the Ask The Wizard area.