Jason C Fox

US Patent:

60353260, Mar 7, 2000

Filed:

Sep 8, 1997

Appl. No.:

8/925180

Inventors:

Robert S. Miles - Malvern PA
Jason P. Fox - Bechtelsville PA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1516

US Classification:

709206

Abstract:

The present invention is a system and method for creating lookup trees of mapping specifications for multiprotocol messaging environments. Source data, which is preferably updated infrequently, is compiled into a hierarchical tree, which is stored in a file. The file contains internal data structures that can be used simultaneously by multiple processes at different virtual addresses. A lookup code finds the longest match, if any, for a given key, in a very efficient manner. In a preferred embodiment, the present invention efficiently maps names between X. 400 and SMTP per the RFC1327 specification. The organization of the keys, along with the present invention's partial match characteristics, may also be used to efficiently retrieve domain specific configuration data for an SMTP Message Transfer Agent.

US Patent:

20190394246, Dec 26, 2019

Filed:

Jun 18, 2019

Appl. No.:

16/444676

Inventors:

- Shelton CT, US
Keith Youndt - Pottstown PA, US
Jason Fox - Bechtelsville PA, US

International Classification:

H04L 29/06
H04L 12/66
H04L 29/12

Abstract:

A gateway is configured to be situated in a local area network (LAN) of Internet Protocol (IP)-based units having a serverless page party (SP2) function that employs multicast technology for page/party audio. The gateway converts multicast call traffic to unicast call traffic for transmission over the Internet to one or more IP units with SP2 function in different LANs. These different LANs are each provided with respective gateways that are configured to convert the unicast traffic back to multicast traffic to connect the page/party audio of an SP2 system among disparate facilities having different LANs, obviating the need for a dedicated and expensive wide area network for inter-LAN communication among IP units with SP2 function. A license and configuration server is configured to maintain a database of IP addresses of each gateway assigned to the respective inter-LAN or Internet groups and to communicate group IP addresses to the gateways.