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usbprt.hlp
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OS/2 Help File
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2001-12-07
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6KB
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147 lines
ΓòÉΓòÉΓòÉ 1. USB Port Properties ΓòÉΓòÉΓòÉ
Use this window to display or configure the properties of the USB port. It
will allow the user to adjust the timeouts for errors or terminate the
connection to the printer.
Port name : This field shows the name that identifies this port.
Status : This field shows the current status of the USB printer linked to this
port. Possible Status states are ONLINE (ATTACHED) and OFFLINE (DETACHED).
ONLINE (ATTACHED) means that the USB printer is connected and powered on.
OFFLINE (DETACHED) means that the USB printer is powered off or not connected
to the USB host. No actions should be performed with the printer while it is in
the offline state.
Advanced : Display advanced USB port properties dialog.
OK : Save any changed information and close the window.
Undo : Reset all values to their states when the window was opened.
Default : Reset all values to their states when the system was installed.
Cancel : Do not save changes and close the window.
For a detailed explanation of other fields, select from the list below:
Timeouts
Auto monitor
Advanced Properties
ΓòÉΓòÉΓòÉ <hidden> Timeouts ΓòÉΓòÉΓòÉ
These fields set the timeouts that the USB port driver uses to recognize errors
or terminate the printer connection.
Print : The amount of time elapsed before the USB port driver decides that an
error should be returned when communicating with the printer. Default is 45
seconds.
Query : The amount of time to wait after a query has been sent before
terminating the connection to the printer. Set this to 0 to disable closing
the port between jobs. Default is 180 seconds. Only works with bi-directional
printers.
Job : The amount of time to wait after a job has finished before terminating
the connection to the printer. Default is 300 seconds. Only works with
bi-directional printers.
Select the up or down arrow to adjust the number of seconds.
ΓòÉΓòÉΓòÉ <hidden> Auto Monitor ΓòÉΓòÉΓòÉ
This checkbox activates/terminates Auto Monitor feature.
Auto Monitor is activated when the checkbox is set on and terminated when the
checkbox is cleared.
Auto Monitor is a separate application, loaded during system startup, which
detects any changes in USB printer's physical connections and performs
corresponding changes in the system configuration when these events occur. If
Auto Monitor detects a new (not previously installed) USB printer, a new USB
port is installed for this printer and a new Printer Object is created with
output to this port.
Auto Monitor is common for all USB ports and cannot be configured separately
for any installed USB port. The last checkbox state is applied for all USB
ports and is saved in a system configuration file.
Note : under certain conditions, if the port driver fails to activate Auto
Monitor, this checkbox is cleared and cannot be set by a user.
ΓòÉΓòÉΓòÉ 2. USB Port Advanced Properties ΓòÉΓòÉΓòÉ
Use this window to display or configure advanced properties of the USB port.
The advanced properties allow the user to view the device IDs of the connected
printer and adjust the timeouts for the printer.
OK : Save any changed information and close the window.
Undo : Reset all values to their states when the window was opened.
Default : Reset all values to their states when the system was installed.
Cancel : Do not save changes and close the window.
For a detailed explanation of other fields, select from the list below:
Read Timeout
Write Timeouts
View Device
ΓòÉΓòÉΓòÉ <hidden> Read Timeout ΓòÉΓòÉΓòÉ
This field sets the timeout that the USB port driver uses for reading control
information from the printer. The timeout is in milliseconds. It sets the
maximum amount of time to wait for an interrupt indicating that data has been
transferred from the USB peripheral to the USB host. Default is 1000
milliseconds (1 second).
Note : this timeout allows the read request to return sooner.
Select the up or down arrow to adjust the number of milliseconds or input the
number manually.
ΓòÉΓòÉΓòÉ <hidden> Write Timeouts ΓòÉΓòÉΓòÉ
These fields set the timeouts that the USB port driver uses for sending
information to the printer. The timeouts are in milliseconds.
Inter-character : The maximum amount of time to wait for an interrupt
indicating that control data has been transferred from the USB host to the USB
peripheral. Default is 1000 milliseconds (1 second).
Elapsed : The maximum amount of time a write request will wait before returning
to the caller, even if there is more data waiting to be written. The timer
starts when the first data packet is sent to the printer, and the timer runs as
data packets are sent to the peripheral. Default is 60000 milliseconds (60
seconds).
Note : these write timeouts are only used internally by the port driver when in
bidirectional mode. The Print Timeout on the USB Port properties dialog is
the timeout used when returning write failures to applications.
Select the up or down arrow to adjust the number of milliseconds or input the
number manually.
ΓòÉΓòÉΓòÉ <hidden> View Device ΓòÉΓòÉΓòÉ
The selected item from the pull-down list is displayed in the scrollable field
below. It can be the device ID string or a serial number returned by the USB
printer. The default selected item is IEEE-1284 ID.
If the printer is offline or detached and is unable to report its device ID,
the string is retrieved from the port configuration data which was saved during
the USB port installation.
Note : not every printer is able to return all id strings.