"通信连接装置" can be translated as "communication connection device" or "telecommunication connection apparatus" in English.
"Communication connection device" is a more general and commonly used term, which clearly conveys the idea of a device used for establishing or maintaining communication connections.
"Telecommunication connection apparatus" is a slightly more technical or formal term, with "telecommunication" emphasizing the long-distance or electronic nature of the communication, and "apparatus" often used in more technical or scientific contexts to refer to a set of instruments or devices.
In most everyday or business contexts, "communication connection device" would be a suitable and easily understood choice.