CHAPTER 2: Introduction
9
2. Introduction
The LinkUp 5294 is one of the most feature-rich protocol converters on the market today. For example,
it supports the following:
• IBM PC to System/3X file transfers
• Up to 19.2K baud rate, synchronously and asynchronously
• Dual System/3X hosts
• Packet Data Network Access
• Viral Device Addressing
• Auxiliary printing
• Advanced diagnostic and system information functions
Functionally, the LinkUp is designed to convert an IBM System/3X host’s synchronous (SNA/SDLC)
protocol to asynchronous (and vice versa). It also translates the IBM host’s EBCDIC code to ASCII (and
vice versa). To accomplish these tasks, it emulates an IBM 5251 Model 12 Remote Workstation
Controller, a 5294 Remote Cluster Controller, or a 5394 Remote Cluster Controller. PU Type 1 is
implemented by the LinkUp in all emulations.
The LinkUp attaches to the sync communications adapter on your System/34/36/38 or AS/400. It can
be directly (with just an RS-232 cable) or remote (through synchronous modems).
Once you make the connections, the LinkUp enables almost any ASCII terminal or personal computer
and word processor (with the appropriate terminal-emulation software installed) to appear to the IBM
host as an actual 5251 Model 11, 5291, or 5292 Display Workstation, implemented as LU Type 7. It also
lets almost any ASCII printer to appear to the IBM host as an actual 5224, 5225, or 5256 Printer
Workstation, implemented as LU Type 4. Each of these ASCII devices can be directly or remotely
connected through asynchronous modems.
Figure 2-1 shows a typical LinkUp 5294 application.
Figure 2-1. A Typical Application of the LinkUp 5294.
ASCII TERMINAL
DATALYNX/5294
IBM SYS/36
PC
ASCII PRINTER
ASCII PRINTER
ON
SYS OK DCE
DTE
TXD
RXD
RTS
CTS
DTR
DSR
CD
RI/SYN
TXC
RXC
I/O FLT
CHANNEL ERROR
CH SEL
RESET
DataLynx /5294
TM
Up to 32 Async Ports
Support Locally or
Remotely Attached
Devices
Synchronous
RS-232 Interface
Locally or Remotely
Attached
LinkUp 2594