Port Protocols And Connection Specifics; Printer Flow Control And Print Buffers; Figure 31 Typical Pos System - TransAct POSjet 1500 Programmer's Manual

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Data Processing and POSjet 1500 Programmer' s Guide
Communications

Port Protocols and Connection Specifics

Printer Flow Control and Print Buffers

The following figure illustrates the communication flow from host computer to printer and from printer to cash
drawer.
Typical POS System
Host to printer link
Printer
Host Computer
Host to
Keypad
Printer to
Cash Drawer
Cash Drawer
Keypad

Figure 31 Typical POS System

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For the host to printer communication link, the POSjet 1500 Printer supports serial or parallel communications.
The serial and parallel ports both follow standards developed for the personal computer environment.
Page 250 Rev M Nov-07