Asynchronous Access
Users could use modems on the Public Switched Telephone Network to dial TAC ports, calling either from "dumb" terminals or from computers emulating such terminals. Organizations with a large number of local terminals could install a TAC on their own site, which used a dedicated line, at up to 56 kbit/s, to connect to a switch at the nearest Telenet location. Dialup modems supported had a maximum speed of 1200 bit/s, and later 4800 bit/s.
Computer Access
Computers supporting the X.25 protocol could connect directly to switching centers. These connections ranged from 2.4 to 56 kbit/s.
Other Access Protocols
Telenet supported remote concentrators for IBM 3270 family intelligent terminals, which communicated, via X.25, to Telenet-written software that ran in IBM 370x series front-end processors.
PC Pursuit
In the late 1980s, Telenet offered a service called PC Pursuit. For a flat monthly fee, customers could dial into the Telenet network in one city, then dial out on the modems in another city to access bulletin board systems and other services. PC Pursuit was popular among computer hobbyists because it sidestepped long-distance charges. In this sense, PC Pursuit was a forerunner of Voice over IP services.
Users could use modems on the Public Switched Telephone Network to dial TAC ports, calling either from "dumb" terminals or from computers emulating such terminals. Organizations with a large number of local terminals could install a TAC on their own site, which used a dedicated line, at up to 56 kbit/s, to connect to a switch at the nearest Telenet location. Dialup modems supported had a maximum speed of 1200 bit/s, and later 4800 bit/s.
Computer Access
Computers supporting the X.25 protocol could connect directly to switching centers. These connections ranged from 2.4 to 56 kbit/s.
Other Access Protocols
Telenet supported remote concentrators for IBM 3270 family intelligent terminals, which communicated, via X.25, to Telenet-written software that ran in IBM 370x series front-end processors.
PC Pursuit
In the late 1980s, Telenet offered a service called PC Pursuit. For a flat monthly fee, customers could dial into the Telenet network in one city, then dial out on the modems in another city to access bulletin board systems and other services. PC Pursuit was popular among computer hobbyists because it sidestepped long-distance charges. In this sense, PC Pursuit was a forerunner of Voice over IP services.
Cities accessible by PC Pursuit
| City Code | Area Code(s) | City |
|---|---|---|
| AZPHO | 602 | Phoenix, Arizona |
| CAGLE | 818 | Glendale, California |
| CALAN | 213 | Los Angeles, California |
| CODEN | 303 | Denver, Colorado |
| CTHAR | 203 | Hartford, Connecticut |
| FLMIA | 305 | Miami, Florida |
| GAATL | 404 | Atlanta, Georgia |
| ILCHI | 312, 815 | Chicago, Illinois |
| MABOS | 617 | Boston, Massachusetts |
| MIDET | 313 | Detroit, Michigan |
| MNMIN | 612 | Minneapolis, Minnesota |
| NCRTP | 919 | Research Triangle Park, North Carolina |
| NJNEW | 201 | Newark, New Jersey |
| NYNYO | 212, 718 | New York City |
| OHCLV | 216 | Cleveland, Ohio |
| ORPOR | 503 | Portland, Oregon |
| PAPHI | 215 | Philadelphia, Pennsylvania |
| TXDAL | 214, 817 | Dallas, Texas |
| TXHOU | 713 | Houston, Texas |
| WIMIL | 414 | Milwaukee, Wisconsin |
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