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ISO/IEC 11801: 2000 EDITION 1.2

 

Amendment 2 to ISO/IEC 11801

The performance specifications in ISO amendment 2 provide new requirements for return loss and ELFEXT loss to compliment the existing ISO class D requirements. The new specified return loss and ELFEXT loss requirements are in harmony with the values proposed in '568-B.1 & B.2. Edition 1.2 also includes propagation delay and delay skew requirements for channels and permanent links that are in harmony with the requirements of TIA/EIA-568-B.1.

The requirements of Edition 1.2 to ISO/IEC 11801 are normative and this document has become the governing international standard for new Class D cabling installations.

 

Now that ANSI/TIA/EIA-568-B and ISO/IEC 11801 2nd Edition are reaching maturity, cabling standards groups are focusing their efforts on the development of next generation cabling specifications and the fulfillment of technical issues that have surfaced as a result of their ongoing developmental efforts. Some of the draft specifications and guidelines that are being investigated by national or international standards groups for future publications or next editions of '568-B and '11801 are outlined below.

 

Category 6/Class E

Proposed category 6/class E standards describe a new performance range for unshielded and screened twisted-pair cabling. Category 6/class E is intended to specify the best performance that UTP and ScTP cabling solutions can be designed to deliver based on current technology. Category 6/class E will be specified in the frequency range of at least 1-250 MHz. For category 6/class E, the 8-position modular jack interface will be mandatory at the work area. Category 6/class E will be backward compatible meaning that applications running on lower categories/classes will also be supported. If different category/class components are to be mixed with category 6/class E components, the combination shall meet the transmission requirements of the lowest performing category/class component.

Proposed category 6/class E standards describe a new performance range for unshielded and screened twisted-pair cabling. Category 6/class E is intended to specify the best performance that UTP and ScTP cabling solutions can be designed to deliver based on current technology. Category 6/class E will be specified in the frequency range of at least 1-250 MHz. For category 6/class E, the 8-position modular jack interface will be mandatory at the work area. Category 6/class E will be backward compatible meaning that applications running on lower categories/classes will also be supported. If different category/class components are to be mixed with category 6/class E components, the combination shall meet the transmission requirements of the lowest performing category/class component.

 

Category 7/Class F

Proposed category 7/class F describes a new performance range for fully shielded (i.e., overall shield and individually shielded pairs) twisted-pair cabling. It is anticipated that category 7/class F will be specified in the frequency range of 1-600 MHz. Even though these requirements will be supported by a new interface design, category 7/class F will be backward compatible meaning that applications running on lower categories/classes will also be supported.

TIA is not actively developing a standard for category 7.