Browse Prior Art Database

Multiple-Connection System for Remote LAN Access

IP.com Disclosure Number: IPCOM000113781D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Kanada, Y: AUTHOR [+2]

Abstract

Disclosed is a system that allows multiple LAN accesses over telephone lines. It consists of multiple remote terminals, a conferencing machine, and a LAN-WAN gateway. The conferencing machine has a multiple-link connection function for the telephone network. It has only one telephone number, and connects all incoming calls. If PBX supports an equivalent function, the system does not need a dedicated conferencing machine.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 90% of the total text.

Multiple-Connection System for Remote LAN Access

      Disclosed is a system that allows multiple LAN accesses over
telephone lines.  It consists of multiple remote terminals, a
conferencing machine, and a LAN-WAN gateway.  The conferencing
machine has a multiple-link connection function for the telephone
network.  It has only one telephone number, and connects all incoming
calls.  If PBX supports an equivalent function, the system does not
need a dedicated conferencing machine.

      The Figure shows an example of the system.  Two remote
terminals establish communication links with a LAN-WAN gateway at the
same time for remote LAN access.

      The LAN-WAN gateway always maintains a link with the
conferencing machine (link #1).  Two remote terminals place calls to
the conferencing machine and establish links separately (link #2 and
link #3).  They then share link #1 of the gateway.  If both remote
terminals try to send signals at the same time, a collision will
occur on link #1.

      In this system, the terminals employ a contention-type access
control method to avoid collisions between sending signals.  For
example, the terminal listens to the signal on the link during a
sending operation and stops that operation whenever it detects that
another terminal is sending a signal.  In this case, it will
reattempt the sending operation after a random time interval.

      This technology makes the LAN-WAN gateway simple, because it
does not requ...