Solves the problem of voice expansion wiring being limited to a single RJ11 port by allowing flexible distribution without the need for multiple devices. Environmental ABS shell: rugged ABS housing with environmental protection to safeguard the internal chip structure and reduce impact damage. Bronze contact pins: resist oxidation and enhance conductivity for stable transmission, contributing to clearer calls. Telephone 1/4 splitter: divides one telephone line into multiple lines, enabling a single line to connect with multiple telephones or modems, with simultaneous, lossless transmission. Use scenarios Home or small office: share one telephone line among several telephones or a modem without adding extra devices. Reception desk or shared workspace: distribute a single line to multiple handsets or modems for quick extensions and easier access. Networked setups: convenient for systems that require one line to feed multiple devices at the same time without degradation in signal quality.