INTERFACE FEATURES The Model 40200 RS-449 DTE/DCE Data Interface has the following features. • Enables a FIREBERD mainframe to act as the DTE or DCE with an appropriate adapter cable. • Front panel switches allow control over connector termination, clock polarity, and timing mode. • Allows testing of RS-449-type circuits using serial binary formatted data up to 15 MHz. 1.3 INTERFACE COMPATIBILITY The Model 40200 RS-449 DTE/DCE Data interface is designed in accordance with the following specifications. • EÏA Standard RS-449, General Purpose 37-position and 9-position Interface for Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, November 1977. • EIA Standard RS-422-A, Electrical Characteristics of Balanced Voltage Digital Interface Circuits, December 1978. • EIA Standard RS-423-A. Electrical Characteristics of Unbalanced Voltage Digital Interface Circuits, December 1978. • CCITIT Recommendation V. 10 (or X.26), Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications. • CCITT Recommendation V.ll (orX.27), Electrical characteristics for balanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications. * ISO 4902-1980 (E), Data communication - 37-pin and 9-pin DTE/DCE interface connectors and pin assignments.