Browse Prior Art Database

Auto-Configuration of X.31 Semi-Permanent of On-Demand Channels

IP.com Disclosure Number: IPCOM000111820D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Freeman, TS: AUTHOR [+2]

Abstract

This disclosure is intended for ISDN X.31 users where the Terminal Equipment (TE) does not initiate the first call. This is a method for the TE to automatically determine if a given channel is on-demand or semi-permanent. This frees the user from having to configure this option. At the same time, it enables the TE to determine whether handshaking is required when calling in the future.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 62% of the total text.

Auto-Configuration of X.31 Semi-Permanent of On-Demand Channels

      This disclosure is intended for ISDN X.31 users where the
Terminal Equipment (TE) does not initiate the first call.  This is a
method for the TE to automatically determine if a given channel is
on-demand or semi-permanent.  This frees the user from having to
configure this option.  At the same time, it enables the TE to
determine whether handshaking is required when calling in the future.

      The TE waits for a call and establishment of the first
connection.  By observing the handshaking which occurs during a
network's request for a channel, the TE may determine the connection
type.  After this initial connection is terminated, either the TE or
the network may initiate establishment of a new connection.

      Shown below is the timing diagram for the situation where the
network and TE are communicating via an on-demand connection.  By
observing that the network responds to the CONNECT message with a
CONNECT_ACK message, the TE deduces this is an on-demand connection.

          TE (User's
           terminal equipment)   Network
           -------------------   -------
                                 SETUP
                                 <----------
                    CONNECT
                    ------->
                       ...