This part of IEC 807 covers a range of rectangular connectors with round contacts. The contacts have solder terminations. Connector polarization is achieved by the trapezoidal configuration of the shell. Applications for this range of connectors include uses in telecommunication and data processing equipment, instrumentation, and other electronic devices employing similar techniques. While this part covers only solder contacts, it is anticipated that this part will be expanded to cover other types of contact terminations such as printed board mounted terminations, wrap post, etc.