Browse Prior Art Database

User Notification of Device Capacity Exceeded on a Workstation Controller

IP.com Disclosure Number: IPCOM000104896D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 74K

Publishing Venue

IBM

Related People

Manulik, RJ: AUTHOR

Abstract

Disclosed is a software method for informing a workstation user that the attachment of his workstation to a host computer has exceeded the limit of maximum attached workstations for that host computer. The method of attachment to the host computer may be through either a communication or workstation controller (WSC), and this controller may be either local or remote. The workstation may be either a Non-Programmable Terminal (NPT), Programmable Work Station (PWS), printer, another computer or actually any type of attached peripheral device.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

User Notification of Device Capacity Exceeded on a Workstation Controller

      Disclosed is a software method for informing a workstation user
that the attachment of his workstation to a host computer has
exceeded the limit of maximum attached workstations for that host
computer.  The method of attachment to the host computer may be
through either a communication or workstation controller (WSC), and
this controller may be either local or remote.  The workstation may
be either a Non-Programmable Terminal (NPT), Programmable Work
Station (PWS), printer, another computer or actually any type of
attached peripheral device.

      The existing ASCII and twinaxial workstation controllers for
the AS/400* have limitations on the maximum number of devices which
can be simultaneously active.  These limitations are due to memory
and performance limitations of the WSC.  However, despite these
limitations, it is possible to physically attach more devices.  This
is actually allowable as long as no more than the maximum number of
supported devices are active simultaneously.

      The problem arises when more than the allowable maximum number
of devices attempts to become active.  In the case of the twinaxial
WSC, this condition is detected by polling.  In the case of the ASCII
WSC, this condition is detected on the RS232 interface lines.  In
both cases, this condition is reported to the system via an error
log.  However, the user of the display receives no information as to
why his display session will not become active.  This is a customer
satisfaction problem.

      This invention proposes that when a device attaches which
causes the WSC to exceed its maximum number of supported devices,
then a screen image or message (or printed message if the device is a
printer) be sent to this device to inform the user of the problem.
The error can still be log...