此处规定的性能要求包括连接至连接器插头的连接器插头后壳。这种类型的连接器插头与安装在电路卡或印刷电路板（PCB）前边缘的连接器插座相匹配。单光纤电缆进入后壳的防电缆进入功能包括限制移动、位置和扭曲的能力；但是，没有任何功能可以捕获布线或防止各种环境的渗透。

The performance requirements specified herein cover a connector plug backshell that is affixed to the connector plug. This type connector plug is mated to a connector receptacle mounted on the front edge of a circuit card or printed circuit board (PCB). Cable entry resistant features for the single fiber cables entering this backshell include ability to restrict movement, position, and twist; however, there are no features to capture the cabling or to prevent the penetration of various environments.