DATAPAC

Abstract: From Left: Pat O’Leary, Account Manager, Datapac and Linda Lockhart, Group Accounts Manager, The Mansfield Group. “We felt it was time to automate our systems and Dynamics NAV fitted the bill,” she adds. Citywest wanted a single system to suit its diverse business operations; one that could link the financial information across the entire group, automate accounts, integrate with the front of house reservation system – Fidelio Opera – and save staff in the accounts department hours everyday.

Abstract: Datapac is the TransCanada Telephone System's public packet-switched network, based on the Northern Telecom SL-10 Packet Switching System. The primary packet-switched communications facility offered by the SL-10 in Datapac is a virtual circuit service for which several types of customer interfaces are available. The virtual circuit service relies on a datagram facility for basic internodal communications. This paper characterizes the virtual circuit and datagram communications layer of Datapac and presents the routing, flow, and congestion control techniques currently in place for these two layers. Also, the additional measures used to control international virtual circuits are discussed.

Abstract: The Ministry of Health and Long-Term Care no longer accepts new Health Card Validation (HCV) enrolments or new Electronic Data Transfer (EDT) enrolments (claims submissions/ overnight batch eligibility checking) that require Bell Canada's Datapac service as a connection method to the ministry. The following options are available to replace Datapac connections.

Abstract: Datapac is a nation-wide public packet switching data communications network operated by the Trans-Canada Telephone System. Datapac, as other networks being developed around the world, allows terminals to access its services by using a standard interface: CCITT Recommendation X.25. Recommendation X.25 defines a set of conventions governing the manner in which packet terminals format control information and data into packets, establish, maintain and clear calls, and manage the transmission and flow of data to and from a packet network. Recommendation X.25 defines a user/network interface; it does not define the end-to-end service provided by the network though clearly there is a close functional correspondence between signalling provided across the interface and across the network.Recommendation X.25 adequately describes the characteristics of the network service allowing manufacturers to provide a single implementation of X.25 which can work on any of the networks supporting X.25. This adequate definition of the end-to-end service allows users to achieve first order benefits of packet networks. For an optimized implementation in a user's equipment, it is necessary to define the service characteristics of national and international services.This paper defines the functional, economic and performance-related characteristics of virtual circuits, specifically those on Datapac.