Manual Communications Line Switch Options

This document is the option description manual for the CS11-M family of manual communication line switches. It covers installation, operation, theory of operation, maintenance, and includes a shipping/accessories list. The manual explains how these switches facilitate manual switching of communication lines between sets of communication interfaces, which is particularly useful for multiprocessor configurations to allow one computer to act as a backup for another. It supports various line types, including 20 mA current loop, EIA RS-232-C, Bell Type 303, and BC14L type lines.