Browse Prior Art Database

Parallel Connection Management using Subaddress for ISDN Short Hold Mode

IP.com Disclosure Number: IPCOM000103793D
Original Publication Date: 1993-Jan-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 1 page(s) / 67K

Publishing Venue

IBM

Related People

Fisher, ME: AUTHOR [+4]

Abstract

For short hold mode (SHM) data communications, a method is disclosed to uniquely identify multiple connections to the same remote station, by sending an exchange-identifier frame that includes both a network connection identifier (the phone number) and a logical connection identifier that is a pre-configured subaddress existing across a system power-off or system reset. The disclosure applies to short hold mode with balanced protocols, such as might be used over ISDN.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 65% of the total text.

Parallel Connection Management using Subaddress for ISDN Short Hold Mode

      For short hold mode (SHM) data communications, a method is
disclosed to uniquely identify multiple connections to the same
remote station, by sending an exchange-identifier frame that includes
both a network connection identifier (the phone number) and a logical
connection identifier that is a pre-configured subaddress existing
across a system power-off or system reset.  The disclosure applies to
short hold mode with balanced protocols, such as might be used over
ISDN.

      An exchange-identifier frame is sent to the remote side to pass
state and identity information; the sender's phone number within this
frame identifies the network connection between the two stations.  An
additional mechanism is needed, however, to uniquely identify more
than one logical connection between the two stations over the same
network connection; this mechanism is a list of pre-configured
subaddresses that persist across system resets.  The subaddress is an
identifier that is agreed to by both parties participating in a SHM
conversation and is configured at both stations.

      EXAMPLE 1: If there is a single existing connection between
stations A and B, identified by subaddress 01, and station A receives
a new connection request from B with subaddress 02, then A knows that
this new connection request is valid.

      EXAMPLE 2: Assume that both connections in example 1 are
temporarily disconnect...