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switching gathers data from many interfaces and then sends them as continually as possible. This means unused time by any given customer can be used to send packets from another. In systems where the total utilization is low or peaky, this can allow many customers to use a single link. The new system was announced in March 1976.
118:
networks were being installed. These offered the ability to greatly increase the number of customers able to use the network. In time division multiplexing, each customer is given a fixed time slot, which is used up even if they do not transmit anything during that period. In contrast, packet
95:
to large business customers like banks and insurance companies who needed to move data between their offices. The company offered only the physical link, it was up to the customers to provide the equipment needed to link their systems together, typically provided by their primary
111:, and then sent across the country on the existing high-speed microwave links. Customers could also save money if they only needed lower data speeds or to exchange data at certain times of the day. On its commercial release in February 1973, it was given the name The Dataroute.
163:
was set up in Ottawa, linked into the network on 9600 bps links directly to the Ottawa and
Toronto nodes. By 1980, the network was available in fourteen major cities, and by the mid-80s, local dialup numbers were available in most cities and larger towns.
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project, which released their standards in a series of books starting in 1976 with the "Orange Book". Bell's network was already well developed by this point and changes had to be made in order to conform to the initial standard, known as SNAP.
134:
Having already set up many of the underlying systems needed to support X.25, DATAPAC was able to open shortly after the publication of the SNAP standard. The traffic was routed in the SL-10 switch, designed by
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opened in 1975, based on proprietary protocols, and converted to X.25 in 1976. Experimental public packet switching networks were in operation in Europe in the early 1970s, including
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In its initial installations, customer sites would connect to the network using a SNAP interface, or through the simplified "Interactive
Terminal Interface" which emulated a
76:, it finally reverted to Bell Canada when the Stentor Alliance was dissolved in 1999. Like most X.25 networks in the western world, DATAPAC services were largely replaced by
641:
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connection. Users could pay more to have their traffic prioritized. For normal users, the average packet trip time was 0.36 seconds and for priority users, 0.13 seconds.
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In the early 1970s, Bell began exploring ways to make this service more attractive to smaller companies and offices. This led to
Dataroute, carried on the coast-to-coast
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networks to seamlessly transit to another, allowing computers to be connected across national boundaries. In 1975, these efforts were formalized under the international
609:
258:, the importance of DATAPAC diminished in the marketplace. Bell phased out support for DATAPAC, discontinuing the service at the end of 2009.
603:
122:
Bell was among many telecommunications companies examining packet switching, and there was a desire to allow data on any one of the
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network. In contrast to earlier leased lines, Dataroute allowed multiple customers to share a single channel, folded together using
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591:: An example of a Datapac 3201 modem produced by CBC's WANN Connection Devices division.
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to the existing
Dataroute networks. It opened for use in 1976 as the world's first
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39:
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Planning an
Evolution: The Story of the Canadian Payments Association, 1980-2002
650:
547:
206:
563:
530:
694:
683:
515:"Commercialization of packet switching (1975-1985): A Canadian perspective"
49:. Initial work on a data-only network started in 1972 and was announced by
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88:
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in the 1990s and 2000s. Bell phased out the service on 31 December 2009.
50:
668:
388:(Technical report). Science Council of Canada. August 1971. p. 36.
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159:, linked together using Dataroute's existing 56k microwave links. A
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vendors. Such a set-up was not inexpensive to install or operate.
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653:: Security considerations for using networks like Datapac
635:- conversion equipment for Datapac 3101 and 3201 hardware
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connections in a speciality financial industry code.
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Teletype (ASCII) connections, both dial and leased.
467:"Calypso Canada speeds ahead with INETCO CashGate"
402:(Technical report). Trans-Canada Telephone System.
681:
676:- Evidence of DATAPAC usage as late as 2011/2012
662:: How DATAPAC was used in the university setting
605:- Another discussion about the DATAPAC network
548:"DATAPAC: a Canadian packet switching network"
386:A Trans-Canada Computer Communications Network
311:was under development in the United Kingdom.
114:Through this period, the first experimental
610:"The Canadian Point of Sales (POS) Market"
512:
336:
667:- Comments about using DATAPAC to access
209:numbers that are purchased by customers.
143:. The initial network had SL-10 nodes in
600:: A discussion about the DATAPAC network
392:
552:Canadian Electrical Engineering Journal
545:
453:
441:
429:
417:
212:
187:transactions between retailers and the
14:
682:
513:Rybczynski, Tony (11 December 2009).
57:. DATAPAC was implemented by adding
24:
25:
706:
579:
644:: Another DATAPAC conversion box
72:, then Telecom Canada, then the
65:designed specifically for X.25.
546:Erskine, S. B. (January 1977).
506:
477:
459:
227:Connections were made by using
202:also used the DATAPAC network.
469:. INETCO. 2006. Archived from
378:
353:
342:
290:
246:With the advent of lower-cost
13:
1:
318:
241:
205:It was also used to transmit
70:Trans-Canada Telephone System
519:IEEE Communications Magazine
323:
7:
261:
179:One of the uses of DATAPAC
10:
711:
642:Precidia Technologies Inc.
109:time division multiplexing
83:
589:Canadian Banknote Company
564:10.1109/CEEJ.1977.6592834
531:10.1109/MCOM.2009.5350364
200:automatic teller machines
161:network operations center
283:
34:in some documents, was
660:University of Waterloo
193:Interac Direct Payment
189:financial institutions
174:
137:Bell Northern Research
105:Trans Canada Microwave
213:Types of connections
191:(banks) through the
63:public data network
690:Wide area networks
268:Internet in Canada
250:technologies like
68:Operated first by
91:had long offered
16:(Redirected from
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671:circa late-1980s
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619:. Archived from
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361:"Bell acquiring"
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237:X.25 connections
183:was to transmit
141:Northern Telecom
116:packet switching
74:Stentor Alliance
59:packet switching
21:
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598:Phrack Magazine
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337:Rybczynski 2009
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198:network. Some
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40:packet switched
23:
22:
15:
12:
11:
5:
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678:
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672:
663:
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651:SANS Institute
645:
636:
606:
601:
592:
581:
580:External links
578:
577:
576:
543:
508:
505:
502:
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476:
473:on 2007-09-29.
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207:lottery ticket
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626:on 2006-10-31
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525:(12): 26–31.
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486:
485:"Phasing out"
480:
472:
468:
462:
456:, p. 34.
455:
450:
444:, p. 32.
443:
438:
432:, p. 33.
431:
426:
420:, p. 31.
419:
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395:
387:
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356:
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339:, p. 26.
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303:in Spain and
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139:and built by
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628:. Retrieved
621:the original
558:(1): 31–36.
555:
551:
522:
518:
507:Bibliography
492:. Retrieved
490:. Chargen.ca
479:
471:the original
461:
454:Erskine 1977
449:
442:Erskine 1977
437:
430:Erskine 1977
425:
418:Erskine 1977
399:
394:
385:
380:
368:. Retrieved
366:. health.gov
355:
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332:
292:
245:
234:DATAPAC 3000
224:DATAPAC 3201
218:DATAPAC 3101
204:
178:
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133:
121:
113:
102:
93:leased lines
87:
67:
54:
47:data network
45:-equivalent
31:
27:
26:
307:in France.
229:leased line
89:Bell Canada
53:in 1974 as
51:Bell Canada
684:Categories
669:Compuserve
630:2009-12-31
319:References
242:Future use
185:debit card
400:Microwave
324:Citations
98:mainframe
55:Dataroute
587: :
572:30755123
539:23243636
262:See also
157:Montreal
494:23 July
370:23 July
297:Telenet
273:Telenet
181:network
149:Toronto
145:Calgary
84:History
32:Datapac
28:DATAPAC
18:Datapac
570:
537:
278:Tymnet
196:EFTPOS
153:Ottawa
78:TCP/IP
36:Canada
624:(PDF)
617:Eicon
613:(PDF)
568:S2CID
535:S2CID
488:(PDF)
364:(PDF)
284:Notes
169:modem
30:, or
695:X.25
496:2018
372:2018
309:EPSS
301:RETD
256:MPLS
155:and
128:X.25
124:PTTs
43:X.25
560:doi
527:doi
305:RCP
248:WAN
175:Use
38:'s
686::
658:-
649:-
640:-
615:.
596:-
566:.
554:.
550:.
533:.
523:47
521:.
517:.
408:^
252:IP
151:,
147:,
633:.
574:.
562::
556:2
541:.
529::
498:.
374:.
254:/
20:)
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