Unisys Corporation

Kathleen Georgia Elliot

Craig B Johnson

James W Adcock

Joseph E Kessler

Charles M Bartholomew

Jonathan Paul Davis

Harald Samuel Reksten

Kenneth L Willis

Noreddine Bouzi

Robert S Yach

A system and methods that allow local access of data residing and processed on remote messaging system computers is provided. In an illustrative implementation, a plurality of messaging systems having host computers coupled to network interface units (NIUs) act as messaging system nodes (MS Nodes). The NIUs of each of the MS Nodes are interconnected to form a wide area network (WAN) such that data may be freely communicated between the MS Nodes. An exemplary messaging system architecture comprises a host computer interconnected to a NW that, itself, is interconnected to telephone networks and to external computer networks. NIUs support a number of interfaces that allow the communication of data between the NIU and the host, and between the NIU and the external telephone and computer networks. In the distributed messaging system, a call originating from a local MS Node requesting data that resides on a remote messaging system may be transferred to the remote MS Node that has the requested data. The call is processed such that a local NIU accepts the call and communicates the call to a local host. The local host processes the call and determines that the data being requested resides on a remote host. The call is then passed back to the local NIU and transferred to the appropriate NIU using the WAN for processing by the appropriate remote host having the requested data.

Distributed network applications platform architecture

A &ldquo;high availability&rdquo; telephony/messaging system includes a first host comprising a first telephony application, a second host comprising a second telephony application, and a TSP for routing calls on a plurality of telephone circuits to the first and second hosts, for processing by one of the first and second applications. An Inter-System Call Transfer process permits a call routed to an application on one host to be transferred to an application on another host. Therefore, a call routed to a host that is unable to process the call can be redirected to another host that is able to process the call.

Inter-system call transfer

A procedure, enabled in software, and applied to a cache/disk environment controlled by a host computer operating through a Block Multiplexor Channel Interface and Storage Control Unit, functions to use FIPS 97 and FIPS 60 protocols to execute data transfers between host processors and a plurality of disks whereby simultaneous operations can function with up to 16 disk units. Up to seen I/O requests can be queued on each of the 16 disk units while the system can normally operate in the cache/disk mode. Additionally, the system can operate in the disk-only mode or storethrough mode.

FIP-compliant block multiplexor channel interface operational method for

Growing community of inventors

Chester Springs, PA, United States of America

Kathleen Georgia Elliot