The Siemon Company
（重定向自Siemon）
The Siemon Company is a manufacturer and designer of network cabling and coupling devices based in Watertown, Connecticut. It was founded in 1903 by Carl F. Siemon as The Siemon Hard Rubber Company. It is a privately held company.
In 1906 they entered the new telecommunications industry. AT&T's three-pole connecting blocks were ceramic and thus easy to break. Carl Siemon manufactured a durable plastic version identical to the AT&T block and became a supplier for AT&T and the later "Baby Bells."