The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used, both in its original inch (exactly 6.35 mm) size and in miniaturized versions: 3.5 mm (approx. inch) and 2.5 mm (approx. inch).
The "mini" connector has a diameter of 3.5 mm (approx. inch) and the "sub-mini" connector has a diameter of 2.5 mm (approx. inch). The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used.
The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used. The "mini" connector has a diameter of 3.5 mm (approx. inch) and the "sub-mini" connector has a diameter of 2.5 mm (approx. inch).
The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used. The "mini" connector has a diameter of 3.5 mm (approx. inch) and the "sub-mini" connector has a diameter of 2.5 mm (approx. inch).