IBM manual 3770Link Features, Emulation Features

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3770Link

3770Link Features

3770 Emulation Features

∙IBM 3776/3777 Model 3 or Model 4 emulation (SNA Logical Unit type 1)

∙LU−LU and SSCP−LU sessions

∙Unlimited number of concurrent sessions

∙Receive to console, printer, or disk file

∙Automatic ASCII↔EBCDIC translation

∙PDIR record recognition

∙FMH 1 and FMH 3 support

∙Data compression and expansion

∙Expansion of compacted host data streams

Advanced Features

∙Automatic server LU recognition

∙Formatted (automatic) and unformatted logons

∙Detailed log file with date and time stamps

∙Automatic concatenation of transmitted files

∙Automatic naming of received files

∙Supports multiple configurations

∙Transmission and reception of binary files

∙Real-time session statistics

∙Configurable ASCII↔EBCDIC translation tables

Script Language For Unattended Operation

∙Execute scripts from the command line, batch files, parent process, or menu

∙Execute external processes and evaluate results

∙Accept commands from a client process

∙Command line parameter substitution

∙Call scripts from within scripts

∙Time activated commands

∙Branching and looping commands

∙Extensive result codes and error testing

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Contents Demo Version User’s Guide Table of Contents 3770Link SNA/RJE EmulationNotational Conventions 3770Link Demo Version User’s Guide Ordering InformationTechnical Support Introduction to 3770Link 3770Link Features Emulation FeaturesRJE Server Features Software Installation Media and FilesRunning 3770Link GUI and Simulating an Interactive Session 3770LINK.HLPReceive Complete, 131 Records Received Running 3770Link SO and Simulating an Unattended Session Simulating Sending and Receiving Files with the Demo Script Commands Script FilesSample Script Files Disc Quit Disc 3770Link Script Language Form formname IFERROR= nnnn label Iferror nnnn labelDial xxx-xxx-xxxx /t=x /m=x If label1, label2Iffile filename label Ifnfile filename labelPrint file ptr Rename filename1 filename2 Rename filename1 to filename2Command Line Options Ffile

3770 specifications

The IBM 3770, introduced in the mid-1970s, was a pioneering multi-user data station known for its innovative design and functionality, aimed primarily at supporting online transaction processing. As one of the early efforts in integrating computers with communication technology, the 3770 set a foundation for subsequent advancements in the field.

One of the standout features of the IBM 3770 was its ability to support multiple user connections simultaneously. This multi-user capability allowed organizations to connect various terminals to a central computer, facilitating efficient data entry and retrieval processes. Each terminal could communicate with the mainframe, enabling users to access real-time data and execute transactions concurrently, which was revolutionary for its time.

The 3770 utilized a proprietary communication protocol that leveraged synchronous serial communication, ensuring reliable data transmission over telephone lines and enabling the automation of remote data entry. This technology reduced the need for physical interaction with centralized data processing systems, leading to increased productivity and efficiency in organizational workflows.

In terms of characteristics, the IBM 3770 was equipped with a dedicated processor for handling input and output operations. This feature offloaded routine tasks from the mainframe, optimizing overall performance and freeing up computational resources for more intensive processing activities. Additionally, the system was designed to support a variety of input devices, including keyboards and card readers, accommodating different user preferences and operational needs.

The architecture of the IBM 3770 included a unique data format that streamlined the handling of transactions. This format allowed for easy integration with existing databases and applications, making it an attractive solution for businesses looking to modernize their data processing capabilities. The system also featured built-in error detection and correction routines, which ensured data integrity during transmission.

Moreover, the IBM 3770 was recognized for its flexibility and scalability. Organizations could easily expand their networks by adding more terminals or connecting additional mainframe storage. This scalability was crucial for businesses experiencing growth, as it eliminated the need for frequent system overhauls.

In summary, the IBM 3770 was more than just a data station; it was a significant step forward in online transaction processing, combining innovative communication technologies with multi-user functionality. Its features, such as dedicated processing, support for various input devices, and scalability, set the stage for future advancements in data systems and remain influential in shaping the landscape of computing.
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