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The 2703 supported up to 176 half-duplex start-stop or Binary
Synchronous communication lines. The maximum speed of one line was 2400 bit/s but the total aggregate line speed was limited. By 1970 the maximum line speed had been raised to 4800 bit/s. The 2703 attached to a single
158:
mode at speeds of up to 40,800 bits per second (bit/s). The 2701 could also have "data acquisition and control adapters" for direct control of external equipment.
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The 2702 could accommodate up to 31 communication lines, but at a slower speed than the 2701. The System/360 Configurator indicates that in the 2702 supported start-stop lines only.
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multiplexer channel; each communication line occupied a subchannel. It had a four or eight byte buffer per line to reduce data transfer to and from the host computer. The
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Remote
Multiplexer allowed up to fourteen slow speed devices to be multiplexed over one high speed line to a 2703.
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The 2701 and 2702 were announced simultaneously with System/360 in 1964, the 2703 was announced a year later.
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for connection to one or two host computers. The synchronous adapter originally supported the
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Many companies produced clones of 270x controllers, such as the
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Computing System with
Synchronous Communications Adapter (SCA)
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Digital Time Unit, and a second channel interface were added.
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or synchronous communications lines. It had two multiplexor
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Pugh, Emerson W.; Johnson, Lyle R.; Palmer, John H. (1991).
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1270, introduced in 1970, and devices from NCR-Comten.
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Initially the 2702 supported the following terminals:
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As of 1967 the 2703 supported the following devices:
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Initially the 2701 supported the following devices:
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IBM 2703 Transmission
Control Component Description
522:
IBM 2703 Transmission
Control Component Description
479:IBM 2701 Data Adapter Unit Principles of Operation
448:
557:Component Description: IBM 2701 Data Adapter Unit
446:
27:1960s-era IBM mainframe communication controllers
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518:
498:
475:
107:The family consisted of the following devices:
391:AT&T 83B2 Type Selective Calling Terminals
316:AT&T 83B2 Type Selective Calling Terminals
243:AT&T 83B2 Type Selective Calling Terminals
400:Remote System/360 via 2701 with 2701 or 2703
126:IBM 3704 and 3705 communications controllers
151:Binary Synchronous Communications (BISYNC)
502:IBM System/360 Input/Output Configurator
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14:
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442:
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124:The 270x series was superseded by the
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435:
394:Western Union Plan 115A Outstations
319:Western Union Plan 115A Outstations
246:Western Union Plan 115A Outstations
186:Magnetic Tape Transmission Terminal
180:Magnetic Tape Transmission Terminal
154:when it was introduced in 1967, in
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273:Communication Terminals, and the
146:Synchronous Transmit-Receive (STR)
88:is a generic name for a family of
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598:
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388:and 2740 Communications Terminals
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451:IBM's 360 and Early 370 Systems
210:Programmed Transmission Control
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469:
136:The 2701 supported up to four
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1:
577:IBM System/360 mainframe line
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337:Communication Terminals, the
117:IBM 2703 Transmission Control
114:IBM 2702 Transmission Control
382:Process Communication System
313:Process Communication System
240:Process Communication System
216:Serial synchronous terminals
204:Communication Control System
7:
397:Common Carrier TWX Stations
322:Common Carrier TWX Stations
249:Common Carrier TWX Stations
213:Remote System/360 with 2701
60:; 57 years ago
10:
603:
406:Data Transmission Terminal
174:Card Transmission Terminal
111:IBM 2701 Data Adapter Unit
94:communications controllers
582:IBM mainframe peripherals
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376:Data Communication System
370:Data Communication System
307:Data Communication System
301:Data Communication System
261:Contact operate terminals
234:Data Communication System
228:Data Communication System
72:
54:
49:Communication controllers
44:
35:
519:IBM Corporation (1967).
499:IBM Corporation (1965).
476:IBM Corporation (1965).
344:
280:
258:Contact sense terminals
198:Data Communication Unit
192:Data Communication Unit
131:
364:Data Collection System
295:Data Collection System
222:Data Collection System
168:Data Transmission Unit
325:European Teleprinters
255:Parallel data devices
252:European Teleprinters
148:protocol, and later
587:Networking hardware
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142:channel interfaces
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92:non-programmable
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16:(Redirected from
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528:. Archived from
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31:IBM 270x series
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551:External links
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535:on 2011-03-22
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537:. Retrieved
530:the original
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277:were added.
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55:Release date
156:half duplex
104:computers.
571:Categories
539:2012-08-11
429:References
329:Later the
265:Later the
138:start-stop
102:System/370
98:System/360
96:used with
128:in 1972.
73:Successor
410:IBM 1130
404:IBM 2780
386:IBM 2741
380:IBM 1070
374:IBM 1060
368:IBM 1050
362:IBM 1030
352:IBM 2712
339:IBM 1032
335:IBM 2741
331:IBM 2740
311:IBM 1070
305:IBM 1060
299:IBM 1050
293:IBM 1030
271:IBM 2741
267:IBM 2740
238:IBM 1070
232:IBM 1060
226:IBM 1050
220:IBM 1030
208:IBM 7750
202:IBM 7740
196:IBM 7711
190:IBM 7710
184:IBM 7702
178:IBM 7701
172:IBM 1013
166:IBM 1009
77:IBM 37xx
18:IBM 2703
423:Memorex
63: (
459:
417:Clones
79:series
533:(PDF)
526:(PDF)
506:(PDF)
483:(PDF)
457:ISBN
345:2703
333:and
281:2702
269:and
132:2701
100:and
86:270x
65:1967
58:1967
45:Type
90:IBM
573::
491:^
437:^
542:.
508:.
485:.
465:.
67:)
20:)
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