Browse Prior Art Database

Printer Attachment/Server Architecture for Token Ring Local Area Net Work

IP.com Disclosure Number: IPCOM000101485D
Original Publication Date: 1990-Aug-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Howell, JH: AUTHOR [+2]

Abstract

A general-purpose architecture is disclosed which permits a printer to be attached directly to the Token Ring LAN (Local Area Network), by combining the logical link physical attachment and print server functions in one package.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 70% of the total text.

Printer Attachment/Server Architecture for Token Ring Local Area Net Work

       A general-purpose architecture is disclosed which permits
a printer to be attached directly to the Token Ring LAN (Local Area
Network), by combining the logical link physical attachment and print
server functions in one package.

      Fig. 1 is a schematic diagram of the physical system showing
Token Ring LAN 1 with various Attachment Devices (ADs) 2, and Printer
3 which is attached to the LAN by Cable 4.  Physically incorporated
within Printer 3 is Printer LAN Attachment Server (PLAS) 5.

      Fig. 2 is a block diagram of the present PLAS embodiment.
Block 6 provides LAN interface analog components for line
termination, surge suppression, filter, equalizer circuit and line
interface functions.  Block 7 is the LAN interface module.  It
includes a microprocessor and provides all the physical ring
interfacing, link clocking, serialization, deserialization, link
address recognition, frame structuring/ stripping and error checking.
Block 8 is the interface control store providing code space for the
interface microprocessor. Block 9 provides a RAM buffer for data
going to or coming from the LAN.  It is "shared RAM" in that it is
accessed by both the PLAS microprocessor and the LAN interface module
2 which provides the memory control functions.  Block 10 provides
redrive necessary for the interface module (Block 7) to drive the
loads on the interface signals.

      Block 11 i...