Mark/Space Polarity Selection Switch; Adapter Only) - IBM RT PC Options Installation

Mark/Space Polarity Selection Switch (8-Port Asynchronous MIL-STD 188

Adapter only)

6-40 Options Installation
Use the following diagram to set mark/space polarity for Ports A
through H on each 8-Port Asynchronous MIL-STD 188 Adapter; an
opened paper clip or ball-point pen can be used to set the switches.