Twisted Pair (Balanced) Cabling

The categories of transmission performance specified by Siemon for cables, connecting hardware links and channels are:

Designation	Transmission Characteristics	Description
	Transmission characteristics are specified up to 16 MHz.	Meets applicable category 3 and class C requirements of ISO/IEC 11801:2002, ANSI/TIA/EIA-568-B.1 & B.2. Requirements are specified to an upper frequency limit of 16 MHz.
	Transmission characteristics are specified up to 100 MHz.	Performs to category 5e of ’568-B.1 & B.2 and additional class D requirements of ISO/IEC 11801:2002. Requirements are specified to an upper frequency limit of 100 MHz.
	Transmission characteristics are specified up to 250 MHz.	Performs to category 6 of ’568-B.2-1 and class E requirements of ISO/IEC 11801:2002. Requirements are specified to an upper frequency limit of 250 MHz. This classification is a superset of category 5e.
	Transmission characteristics are specified up to 600 MHz.	Performs to category 7 and class F requirements of ISO/IEC 11801:2002. Requirements are specified to an upper frequency limit of 600 MHz. This classification is an electrical superset of.

Notes:

Terminology and classifications specified in ISO/IEC 11801:2002 for cabling links differ slightly from TIA categories.
Components and installation practices are subject to all applicable building and safety codes that may be in effect.