DT-6XXX IP-SPOOL Application User’s Manual – Build 12.0
04/13/06
Datatek Applications Inc.
13
application on the specified
instance#,
which may be in the range of 1 through 30
2
,
inclusive.
After the IP-SPOOL application is operating, the administrator configures the IP-SPOOL
application by connecting to the administrative interface for this particular IP-SPOOL
instance
. The TCP port number would be at 10,000 + the
instance#
. Configuration of the
IP-SPOOL application involves entering the shared RFC1179 printer’s IP address and the
capture timeout period.
7.2 O
PERATION
The IP-SPOOL application listens for a call to its “virtual printer” TCP port. A device that
previously had a connection to a dedicated printer may then make a connection to that
TCP port. This connection is permanent.
3
When data arrives on the “virtual printer” connection, it will be forwarded to the shared
printer via the RFC1179 protocol (assuming the shared printer IP address is defined). This
is done after the configured capture timeout period has elapsed, or when a high-water
mark in the spooling buffer has been reached.
After the shared printer acknowledges receiving all data sent to it, or a user-configurable
timeout window has elapsed, the connection to the shared printer is disconnected. The
timeout prevents a “hung” connection in the case where the acknowledgement from the
printer was not received, thus allowing other IP-SPOOL instances, as well as any other
host, to attach to the shared printer.
2
For the DT-6260, the range is 1 to 48.
3
Referring back to the example network shown earlier in this document, each DT-4XXX port to which an NE
printer interface is connected would have its PDD
redirected to
an instance of the IP-SPOOL application (DT-
6XXX IP a “virtual printer” TCP port). Similarly, the IP-B2APRT application would be re-
configured to redirect its output to a “virtual printer” instead of a physical printer.
