Browse Prior Art Database

Method of Managing User Side Terminal Equipment Attached Devices

IP.com Disclosure Number: IPCOM000122515D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 5 page(s) / 191K

Publishing Venue

IBM

Related People

Ellesson, EJ: AUTHOR [+8]

Abstract

Integrated Services Digital Networks (ISDNs) provide attaching clients the capability of sending/receiving a variety of types of data in digitized form. This includes voice, computer data, and image. In order to allow end users access to this digitized information, the appropriate user interface device is required (e.g., a telephone for digitized voice) as part of the user side terminal equipment (TE) configuration. These user interface devices may include telephones, audio headsets, facsimile machines, video monitors, etc.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 38% of the total text.

Method of Managing User Side Terminal Equipment Attached Devices

      Integrated Services Digital Networks (ISDNs) provide
attaching clients the capability of sending/receiving a variety of
types of data in digitized form.  This includes voice, computer data,
and image.  In order to allow end users access to this digitized
information, the appropriate user interface device is required (e.g.,
a telephone for digitized voice) as part of the user side terminal
equipment (TE) configuration.  These user interface devices may
include telephones, audio headsets, facsimile machines, video
monitors, etc.

      This article describes a method that allows an application in a
TE to manage locally attached devices in a manner which is device-
independent.  Device management includes the following functions:
      o Establishing access and addressing for particular devices.
      o Controlling actions performed by a particular device (e.g.,
turning a speaker on).
      o Providing initial configuration data to a particular device.
      o Updating a particular device's configuration data during
normal operation.

      See Fig. 1 for an illustration of functional placement of local
device support within a TE.
Device Control Primitives

      Device management is accomplished by exchanging implementation-
independent messages or primitives between the host application and a
communications subsystem (CSS). The primitives instruct the
communication subsystem to perform specific functions such as device
configuration, controlling specific device functions, establishing
device addressing across the interface, etc.

      Note: The transport mechanism used to exchange the primitives
between the host application and the communication subsystem is not
part of this invention and is implementation-specific.
      Defined primitives are:
      Primitive           Description
      Open Device         This primitive instructs the CSS to
configure and establish addressing for a
particular device.
                          This primitive has two forms:
                          1. Request - Issued by the host application
to the CSS.
                          2. Confirm - Issued by the CSS to the host
(contains the completion status of the requested open device).
      Close Device        This primitive instructs the CSS to clear
configuration data for a particular device
and remove device addressing.
                          This primitive has two forms:
                          1. Request - Issued by the host application
to the CSS.
                          2. Confirm - Issued by the CSS to the host
(contains the status of the requested close device request).
      Control Device      This primitive instructs a particu...