Communications Protocol

The Communications Protocol Parameter Programming selects the protocol that the NCR 7879 uses to communicate with the host terminal.

Note:  The factory sets the Communications Protocol according to the specifications on the order. Since there is no default Communications Protocol; the Default tag does not change this parameter.

IBM Slot Scanner

All models of the NCR 7879 support the IBM 468x/9x format and use the same protocol found on IBM host terminals. The scanner uses any port number beginning with 9 or 5 (as in 9B or 5B) and the select address is set to 4B.

RS-232

RS-232 is used to connect the NCR 7879 to almost any RS-232 type of communications device. This protocol uses 7-bit ASCII by default to send tag data to the device.

IBM USB

The NCR 7879 can communicate to the host terminal through a USB cable. This parameter enables the scanner to use IBM’s proprietary version of HID-type USB protocol.

NCR (RS-232 USB)

The NCR 7879 can communicate with the host terminal through a USB cable. This parameter enables the NCR (RS-232) format.

Note:  Two programming tags must be scanned to enable this parameter: Hex E followed by Hex 0.