X.25

Explore the Cisco Data Communications Network (DCN) solution. This interesting and informative video presents the latest developments in service provider operations and Data Communications Networking, as well as the full suite of Cisco offerings. Don't miss this unique opportunity to hear Cisco and industry experts discuss your Data Communications Networking options. tech news

This document describes Cisco network solutions for transporting data between a telephone switch and the Operations Support Systems (OSSs) in a telco data communications network (DCN). tech news

France Telecom is one of the world's leading telecommunications providers. SNPI manages over 800 core business applications for France Telecom, including subscriber invoicing. In a recent review of the 50 data centers that provide call details for France Telecom's invoice generation, SNPI determined that it could realize significant network infrastructure cost savings, without losing X.25 functionality, by replacing its SNA communications controllers with TCP/IP routers and Unicenter TCPaccess X.25 Server. In a short time since deploying CA's Unicenter TCPaccess X.25 Server solution, SNPI has realized significant operational cost savings. tech news

Frame relay is a synchronous HDLC protocol based network. Data is sent in HDLC packets, referred to as "frames". The diagram below of an HDLC frame may be familiar, since without adding specific definitions of how the Address, Control and CRC is used, the diagram is applicable to IBM's SDLC, to X.25, to HDLC, to Frame Relay, as well as other protocols. tech news

X.25 is a protocol that the CCITT developed to provide reliable data communications on public data networks. It uses packet switching and virtual circuits, and provides a data rate up to 64kbps. It provides very robust error checking features, which makes it a good choice for older networks. Because of its extensive error checking, it not only works well on these older networks that are more susceptible to physical interference, but this also has made it a widely accepted protocol that is used in many parts of the world. (I understand that it is not used in Hawaii anymore though). Although most packet switching technology does not use a dedicated physical or virtual circuit and is generally connectionless in nature, X.25 establishes virtual circuits that allow it to be connection oriented. The connection is established, the data is transferred, and then the connection is terminated. tech news