Demo User’s Guide

RJE Server Features

Load 3770Link as an RJE server

Submit commands to 3770Link from user-written client program via DDE interface

Supported Host Environments

Host systems: POWER (DOS/VSE); JES2 and JES3 (MVS); other VTAM environments; and others

Host connections: SDLC, X.25, ISDN, Ethernet, token ring (or other server supported physical link)

3770Link System Requirements

486 or Pentium PC (or compatible)

Windows 95/98 or Windows NT

The client version of 3770Link requires one of the following:

-Microsoft SNA Server 2.11 or later

-IBM Communications Server for NT 5.0 or later

-Novell Netware for SAA 3.0 or later

SSI SyncPlus SDLC Adapter (optional with 3770Link)

16-bit ISA bus adapter

Includes software drivers for Microsoft SNA Server

Link speeds up to 128Kbps (RS232C interface)

Dual-channel DMA support; eight (8) IRQ settings

Auto-dial with V.25bis and ‘AT’ command set modems (fully integrated with 3770Link)

Auto-answer with most modems

5

Page 7
Image 7
IBM 3770 manual RJE Server Features

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.