1/4 circuit board design ensures stable, lownoise voice transmission. Environmentally protective ABS shell safeguards the internal chip structure and provides impact resistance. Solves the limitation of voice expansion wiring being restricted to a single RJ11 port; enables distribution to multiple devices without needing additional units. Telephone 1/4 splitter divides one telephone line into multiple lines, allowing one line to connect to multiple telephones or modems with simultaneous, lossless transmission. Use scenarios Home office or small home setup: share one landline among several phones or a modem for data transfer while maintaining clear voice quality. Small business or reception area: connect multiple stations or devices to a single line, enabling simultaneous calls without swapping cables or adding extra hardware. Workshop or lab environment: run multiple telephones and modems from one line for concurrent communications without signal loss.