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The Telenetreport The Telenet Report JL ® " Telenet Communications Corporation, 1050 17th St., N.W., Washington, D.C. 20036. (202)637-7900 Volume 3, Number 1, February 1976 Profile of TelenetSubscribers: Wide Range of Computer Systems Sign Onto Telenet's Public Network Who is a typical Telenet subscriber? tions. Some have extensive networks graphic databases which theircustomers What kind of computer system does he which currently operate in parallel with may access through Telenet. Lockheed's have and how is he using public packet Telenet's, while others utilize no other Dialog" service, for example, permits switching service? network facilities. There are hosts con- searching files containing millions of ab- Thelogical mapof the network on page nected to the network by means of a stracts of technical, educa- 2 shows the particular host computers singleasynchronous communication tional, social, agricultural and business that have been connected to the Telenet line, or multiple asynchronous direct literature and retrieving selected items. network in our first six months of opera- channels into a Telenet Access Con- SUNY's biomedical information retrieval tion. Several dozen additional hosts are traileron theirpremises. There are other scheduled for service during the first hosts that are connected by means of quarterof 1976, and network expansion synchronous communication lines em- both within Telenet Central Offices and ploying powerful network access proto- into new cities is also underway. cols. Most Telenet subscribersare using the Most subscribers made no changesto network to provide remote terminal their systems when connecting to the access to their host computer, but the network, while others either installed range of systems and applications are Telenet-furnished network interface soft- diverse. Some subscriber systems, such ware, or wrote their own. as MlT's IBM 370/168 are very large, Services Offered while others are low-cost minicomputers. Significantly, the network is accommo- A number of hosts are offering commer- dating a wide range of quite different " cial computer services, computer while others are remote-access applications, using Telenet solely for in-house applica- Several subscribers maintain biblio- Packet Nets Agree on Standard Interface Substantial progress has been made The X-25 interface protocol is very in reaching worldwide agreement on a similar to the current Telenet host inter- Medical researchers can access "Medline" standard host interface to public packet- face specification. It is based on the con- through Telenet and instantly retrieve bib- switched networks. cept of virtual connections whereby no liographic references on any topic in their A major toward field. Severalcomputer systems connected effort this end has been actual channel capacity is utilized except to Telenet provide this valuable medical undertaken by the CCITT (Consultative when datais being sent. data base service. Committee on International Telephone The new protocol is currently being and Telegraph].Continuing theprogress implemented by both Telenet and the service, to gov- made at the last CCITT meeting in Sep- Trans-Canada System and should be available academic and tember, the major countries involved in available to customers by mid-1976, ernmentorganizationson a membership basis, also permits packet networks have jointly prepared Telenet's current host interfacewill, how- search and retrieval of medical, educational, biological and agreed upon a complete detailed ever, continue to be supported by and the psychological interface specification. Labeled "X-25," network. literature abstracts. At this writing, bibliographic theprotocol has been formally submitted An internationally agreed upon stand- another information offered by Systems to the CCITT by the United Kingdom and ard is seen as a major step in retrieval system, De- forward velopmentCorporation, France with the concurrence of Telenet providing guidelines forcarriersand is also scheduled data to make through and the Trans-Canada Telephone Sys- processing equipment its service available manufacturers Telenetfacilities. tern. It will be discussed at the organiza- and in hastening the development of tion's meeting in Geneva in late February. worldwidepacket-switching service. (continued on 2) Telenet®and _L ''areregistered service marks Telenet Communications Corporation "Copyright 1976 Telenet Communications Corporation scientific, page of Profile of Telenet Opens New Telenet Subscribers: Markets to Time-Sharing Systems " Regional time-sharing systems that want to become national in scope are typical of many Telenet subscribers. Two northeastern computer services-one commercial, the other non-profit-illus- trate how and why public networking fits into theirfuture growth plans. DartmouthTime Sharing System "We're more computer specialists than communications managers." That, ac- cording to Gene Fucci, Assistant Direc- tor of the Kiewit Computation Dartmouth College, is why it makes more sense to let Telenet handle networking for its computer time-sharing system (DTSS). Located in Hanover, New Hampshire, Dartmouth has for several years shared its exceptional computer resources and uniquedatabanks with othereducational institutions in the northeast. Some 50 This logical map shows the kinds of host computers using Telenet service, as of the end of January. colleges are connected to DTSS over a network of leased lines and frequency (continuedtrom page D ing services through Telenet facilities division multiplexers. With the advent of Several large commercial computing Programmed Business Systems of Min- Telenet, it has becomepractical for DTSS service companies with extensive nation- nesota, offering accounting-oriented ser- to offer its services to universities and wide private networks of their own also vices and systems implemented on a schools in distantparts of the country as utilize Telenet. Scientific Time Sharing Prime 300 mini-computer, utilizes the well, without the necessity of installing Corp., one of Telenet's earliest subscrib- network to provide remote access to its and maintaining leased lines. One of its ers and a leader in the development and specialized service. One mini-computer first users via Telenet is the National use of the APL programming language, Prime Computer Inc., Opinion Research Council at the Uni- offers its APLplus® service through Tele- Telenet's principal supplier of computer versity of Chicago. net. Data Resources Inc., headed by equipment, saw yet another possibility. Fucci equates Telenet with being able Professor Otto Eckstein, well-known Their field salesmen have used the net- "to buy communications by the ounce Harvard economist, offers an econo- work to conduct live customer demon- rather than by the pound." He points out metric modeling service utilizing a large strations of the Prime 300 interactive that the'resulting lower communications file of economic data. By supplementing system from remote locations. costs will now make it more economical their own nationwide networks with Tele- In-house computer departments, such forremotesmaller collegesto gainaccess net STSC and DRI are able to as that of Shawmut Bank in Boston, are to the "big systems" like Dartmouth's more easily accommodate rapid growth finding Telenet service an advantageous Honeywell 6000 equipment and to take and provide backup for their own net- way toobtain network capabilitieswithout advantage of the many education-ori- workfacilities as well. requiring the capital investment, long ented computer programs developed at A numberof otherTelenet subscribers delays, and maintenanceburdens asso- Dartmouth over thepast decade. whohave offeredcommercial computing ciated with developing and operating a Thecoast-to-coastavailabilityof Telenet services primarily on a regional basis are private network. local dial-in numbers is also an important now able to market their services nation- The latter advantages are of particular plus for Dartmouth's own faculty and wide. Among them are Interactive Sci- value to universities which seek to have students, 93 percent of whom use com- ences of Braintree, Mass., First Data the computer resources at all academic puting in their academic work. Since the Corp. of Waltham, Mass, and Computer and research centers available to any college operates on a four-semestersys- Sharing Inc. of Denver. individual faculty member or student. tern, many of the faculty are likely to be Operatorsof minicomputer-basedsys- These are but a few of the ways that off campus at any one time. Now they terns are benefiting by the network too. different organizationsare using Telenet. can conveniently continue their com- National Computer Network of Chicago, As other novel applications of the net- puting work from any part of the country using a small-scale Honeywell 1648 sys- work emerge, these will be reported in by dialing into a nearby Telenet Central tern, offers low-cost interactive cornput- future issues of the Telenet Report. Office, (continuedon 4) Center, manufacturer, facilities, Services, page Telenet will intr Jial-in service for jps terminals this spring. It will be " available in selected Telenet C tral Offices based on the needs ofterminal jsers for this higher operating speec At the present time network users can jperate at 1200 bps and higher over private dial and leased channel ports at fixed monthly rates, and. several sub scribers have chosen this option. Host computers connected to the net work by means of the network interface protocolwill
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