ISO / IEC 11801

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The international standard ISO / IEC 11801 , Information technology - Generic cabling for customer premises (Information Technology - Independent cabling for customer demand) describes in six parts, one for a variety of applications such as analog telephony , ISDN networks , various data transfer standards , building and factory automation appropriate Cabling of telecommunication systems ( structured cabling ). Both fiber optic and copper cabling, symmetrical and asymmetrical cabling are described.

The standard was designed for commercial purposes, for applications that include individual but also many buildings in an area. The standard is optimized for widths of up to 3 km and up to 1 km² of office space with 50 to 50,000 people. However, the standard can also be used for installations outside this size.

The major revision of Issue 3 will unify the requirements for commercial, industrial and home applications. The European standard EN 50173 is largely identical to the standard 11801.

Composition of the parts

The 3rd revision of ISO / IEC 11801 was completed in 2017 by ISO / IEC JTC 1 / SC 25 "Interconnection of information technology equipment". The series of ISO / IEC 11801 has appeared since then, like the European series of standards EN 50173 in six parts. The contents of revision 2 of ISO / IEC 11801 have been divided into parts 1 and 2. The standards ISO / IEC 24702, ISO / IEC 15018 and ISO / IEC 24764 have been integrated as parts 3, 4 and 5 and a new part 6 on distributed building services has been added to the series. Edition 3 is a major revision of the standard that aims to unite several previous standards for commercial, industrial and home networks as well as data centers. The European standard series EN 50173 was u. a. also revised to adapt to the ISO / IEC 11801 series and published in October 2018.

The six parts of ISO / IEC 11801 Information technology - Generic cabling for customer premises / Informationstechnik - Application-neutral cabling of locations are composed as follows:

Document number Title of the part replaced released description
ISO / IEC 11801-1 Part 1: General requirements
Part 1: General requirements 		ISO / IEC 11801 2017-11 Generic cabling requirements for twisted pair and optical fiber optic cables
General requirements for twisted pair cables and fiber optic cables
ISO / IEC 11801-2 Part 2: Office premises Part 2: Office
locations 		ISO / IEC 11801 2017-11 Cabling for commercial (enterprise) buildings
Cabling of commercial (company) buildings
ISO / IEC 11801-3 Part 3: Industrial premises
Part 3: Industrial locations 		ISO / IEC 24702 2017-11 Cabling for industrial buildings, with applications including automation, process control, and monitoring
Cabling of industrial buildings with tasks such as automation , process control and monitoring
ISO / IEC 11801-4 Part 4: Single-tenant homes
Part 4: Apartments 		ISO / IEC 15018 2017-11 CATV / satellite TV | SATV applicationsapplications
Cabling for residential buildings including CATV / SATV (1200 MHz)
ISO / IEC 11801-5 Part 5: Data centers
Part 5: Data centers 		ISO / IEC 24764 2017-11 Cabling for high-performance networks used by data centers Cabling of high-performance networks
in data centers
ISO / IEC 11801-6 Part 6: Distributed building services
Part 6: Distributed building services 		ISO / IEC TR 24704 2017-11 IOT devices
building automation and IOT

topology

A hierarchical structure with star-shaped cabling is the basis of the standard. The structure is divided into three levels: the primary cabling, the secondary cabling and the tertiary cabling. The following aspects are named as advantages of this structure and the star-shaped structure of the cabling: The addition of new network segments can take place without impairing the entire structure. Faults in a network segment are restricted to the network segment concerned and do not affect the functionality of other subnets. Redundancy lines can be provided for the failure of a primary line. The effects of a failure of a backbone network on the communication functions within the subnets can be kept low. Various network topologies such as star, bus or ring can be implemented in the tertiary areas. The cable lengths for the primary area were specified as 1,500 meters, for the secondary area with 500 meters and the tertiary area with 90 meters.

Classes and categories

In terms of the transmission medium that can be used, the standards are limited to fiber optic cables and symmetrical twisted pair cables (TP). The recommendations for all cabling areas leave both alternatives free: Gradient fiber with 62.5 / 125 µm and UTP or STP cable.

Optical connections

The standard defines different classes of fiber optic connections:

  • OM1: multimode glass fiber type 62.5 µm core; minimum modal bandwidth of 200 MHz km at 850 nm
  • OM2: multimode glass fiber type 50 µm core; minimum modal bandwidth of 500 MHz km at 850 nm
  • OM3: multimode glass fiber type 50 µm core; minimum modal bandwidth of 2000 MHz km at 850 nm
  • OM4: multimode glass fiber type 50 µm core; minimum modal bandwidth of 4700 MHz km at 850 nm
  • OS1: single mode fiber optic type 1 dB / km attenuation
  • OS2: single mode fiber optic type 0.4 dB / km attenuation

Copper compounds

Impedance

The standard impedance of the connection is 100 Ω (the older version of the standard from 1995 also allowed 120 Ω and 150 Ω in classes A − C, but this has been removed from the 2002 edition).

Classes of copper compounds

The standard defines different connection / channel and cabling categories for TP connections, which differ in the cut-off frequencies required for a certain performance of the channel.

  • Class A: Link / channel up to 100 kHz, with Category 1 cable / connector
  • Class B: Link / channel up to 1 MHz, with Category 2 cable / connector
  • Class C: Link / channel up to 16 MHz, with Category 3 cable / connector
  • Class D: Link / channel up to 100 MHz, with Category 5e cable / connector
  • Class E: Link / channel up to 250 MHz, with Category 6 cable / connector
  • Class E A : Connection / channel up to 500 MHz, with Category 6 A cable / connector (Supplement 1 and 2 to ISO / IEC 11801, 2nd edition.)
  • Class F: Link / channel up to 600 MHz, with Category 7 cable / connector
  • Class F A : Connection / channel up to 1000 MHz, with Category 7 A cable / connector (Amendment 1 and 2 to ISO / IEC 11801, 2nd Ed.)
  • Class I: connection / channel up to between 1600 and 2000 MHz, with Category 8.1 cable / connector (specification under development - specification in preparation)
  • Class II: connection / channel up to between 1600 and 2000 MHz, with Category 8.2 cable / connector (specification under development - specification in preparation)

Category 7

Class F channel and Category 7 cables are backwards compatible with Class D / Category 5e and Class E / Category 6. For Class F, even stricter specifications for crosstalk and system noise apply than for Class E. To achieve this, a shielding is required for the individual wire pairs and intended for the cable as a whole. In addition to the shielding, twisting the pairs and a larger number of these per unit length increase RF shielding and reduce crosstalk.

The Category 7 cable standard was created to enable connections in 10 Gigabit Ethernet over 100 m with copper cables . (10 Gbit / s Ethernet is now typically used in Cat 6 A ) connections.

Like the previous standards, the cable contains four twisted-pair copper wire pairs. Category 7 cables can either be terminated with RJ-45 (8P8C), compatible with GG45 connectors that conform to the 8P8C standard, or with TERA connectors.

In connection with GG-45 or TERA connectors, Category 7 cables enable transmission frequencies of up to 600 MHz.

From November 2010 all manufacturers of active components chosen to support the connector design 8P8C their 10 Gigabit Ethernet products with copper and not GG45 (also called ARJ45 referred), or TERA so that these 6 in Cat A work.

Category 7 is not recognized by the TIA / EIA .

Category 7 A

Class F A (Class F Augmented - Class F improved) channels and Category 7 A cables, which were introduced with ISO 11801 Edition 2 Amendment 2 (2010), are defined for frequencies up to 1000 MHz, are suitable for numerous applications including CATV ( 862 MHz). Each pair of cables offers 1200 MHz bandwidth.

The results of simulations have shown that with 40 Gigabit Ethernet transmission over 50 meters and 100 Gigabit Ethernet over 15 meters is possible.

In 2007, researchers at Pennsylvania State University showed that either 32nm or 22nm circuitry would enable 100 Gigabit Ethernet over 100 meters.

Category 7 A is not recognized (adopted) by TIA / EIA-568.

Category 8

In March 2013 the Technical Recommendation (TR) ISO / IEC TR 11801-99-1 was issued by the ISO / IEC JTC 1 working group for connections for computers and room cabling SC25 WG3 . This TR defines two new categories for 4 paired copper cables with 2 connection modules, with an operating frequency of up to 1600 MHz and possible overhead for 2000 MHz:

  • Class I channel ( Category 8.1 cable): Minimal cable design U / FTP or F / UTP, fully backwards compatible and interoperable with Class E A (Category 6 A ), with RJ-45 connector
  • Class II channel ( Category 8.2 cable): F / FTP or S / FTP minimum, interoperable with Class F A (Category 7 A ), with RJ45 or TERA / GG-45 / ARJ-45 connectors.

Also in March 2013, the Technical Recommendation TIA TR42.7 stipulated that the 40GBASE-T required the definition of a new cabling system that can transmit at least 1.6 GHz and up to 2 GHz and that is currently referred to as Category 8 . It should use the RJ45 connector.

With a max. Link length of approx. 30 meters is the main area of ​​application in data centers.

Category 8 should be fully backwards compatible with Category 6 A and below and will correspond to ANSI / TIA-568-C.2-1 “Specifications for 100  Ω Category 8 Cabling”.

From January 2014, the draft versions of ISO / IEC TR 11801-99-1 and ANSI / TIA-568-C.2-1 were adapted to reduce the differences between categories 8, 8.1 and 8.2. The final specification will depend on the requirements for transceivers established by the IEEE 802.3bq (40GBASE-T) working group .

Acronyms for twisted pair cables

Appendix E, Acronyms for balanced cables ( acronyms for Balanced cables ) 'provides a system for the specification of the design both shielded and unshielded balanced twisted-pair cable.

Three letters are needed:

  • U for unshielded
  • S shielded with fabric
  • F shielded with foil

is a two-part abbreviation in the form xx / xTP, where the first part describes the shielding of the entire cable and the second part describes the shielding of individual elements of the cable.

Common cable types are U / UTP (unshielded cable); U / FTP (shielding of individual elements of the cable without shielding the entire cable); F / UTP, S / UTP, or SF / UTP (shielding of the entire cable without individual shielding); and F / FTP, S / FTP, or SF / FTP (shielding of the entire cable with individual foil shielding).

Versions

  • ISO / IEC 11801: 1995 (Ed. 1) - first edition
  • ISO / IEC 11801: 2000 (Ed.1.1) - Edition 1, Amendment 1
  • ISO / IEC 11801: 2002 (Ed. 2) - second edition
  • ISO / IEC 11801: 2008 (Ed.2.1) - Edition 2, Amendment 1
  • ISO / IEC 11801: 2010 (Ed.2.2) - Edition 2, Amendment 2
  • ISO / IEC 11801: 2017 (Ed.3) - in 6 parts.

See also

literature

  • Jörg Rech: Ethernet: Technologies and protocols for computer networking . Heise Verlag, Heidelberg 2014, ISBN 978-3-944099-04-0 .

Remarks

  1. ↑ Usually copper but also aluminum - see Airbus 380 u. a.

Individual evidence

  1. ↑ a b c ISO / IEC 11801. In: itwissen.info. DATACOM Buchverlag GmbH, accessed on June 19, 2020 .
  2. ↑ Note on the ISO / IEC 11801 standard. In: dke.de. November 17, 2017, accessed June 19, 2020 .
  3. ↑ Note on the series of standards DIN EN 50173 (VDE 0800-173). In: dke.de. November 17, 2017, accessed June 19, 2020 .
  4. ↑ ISO / IEC 11801-1: 2017-11. Information technology - Application-neutral cabling of locations - Part 1: General requirements. Beuth Verlag, accessed on June 19, 2020 .
  5. ↑ ISO / IEC 11801-2: 2017-11. Information technology - Application-neutral cabling of locations - Part 2: Office locations. Beuth Verlag, accessed on June 19, 2020 .
  6. ↑ ISO / IEC 11801-3: 2017-11. Information technology - Application-neutral cabling of locations - Part 3: Locations used for industry. Beuth Verlag, accessed on June 19, 2020 .
  7. ↑ ISO / IEC 11801-4: 2017-11. Information technology - Application-neutral cabling of locations - Part 4: Apartments. Beuth Verlag, accessed on June 19, 2020 .
  8. ↑ ISO / IEC 11801-5: 2017-11. Information technology - Application-neutral cabling of locations - Part 5: Data centers. Beuth Verlag, accessed on June 19, 2020 .
  9. ↑ ISO / IEC 11801-6: 2017-11. Information technology - Application-neutral cabling of locations - Part 6: Distributed building services. Beuth Verlag, accessed on June 19, 2020 .
  10. ↑ Allan Nielsen: AMP NETCONNECT Guide to ISO / IEC 11801 2nd Edition Including Amendment 1 Archived from the original on March 11, 2012. (PDF) In: Tyco Electronics (Ed.): AMP NETCONNECT Guide to ISO / IEC 11801 2nd Edition Including Amendment 1 . 2008, p. 11. Retrieved March 11, 2012.
  11. ↑ Carl G. Hansen: 10GABSE-T for Broad 10_Gigabit Adoption in the Data Center . In: Ethernet Alliance November 2010 . November 2010.
  12. ↑ Researchers push transmission rate from copper cables . In: News release , Pennsylvania State University, November 14, 2007. Archived from the original on February 22, 2012 Info: The archive link was automatically inserted and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. . Retrieved July 9, 2011. @1@ 2Template: Webachiv / IABot / live.psu.edu 
  13. ↑ Rick C. Hodgin: UPDATE: Cat 7 copper theorized to transmit 100 Gbit / s in excess of 100 meters (328 ft), with future modems . In: TGDaily blog , November 14, 2007. Archived from the original on August 3, 2009 Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. . Retrieved July 9, 2011. @1@ 2Template: Webachiv / IABot / www.tgdaily.com 
  14. ^ Alan Flatman: ISO / IEC TR 11801-99-1: Guidance on 40GBASE-T Cabling -a tutorial- . May 16, 2013. Retrieved January 26, 2014.
  15. ^ Alan Flatman: Update on ISO / IEC 11801-99-1 Guidance on 40GBASE-T Cabling . November 11, 2013. Retrieved July 9, 2014.
  16. ↑ a b Alan Flatman: Update on ISO / IEC 11801-99-1 40GBASE-T Cabling Guidelines . January 23, 2014. Retrieved July 9, 2014.
  17. ↑ a b 40GBASE-T / Category 8 Update (PDF) Accessed October 2, 2016.
  18. ^ Ed Sullivan: How Cat 8 Kabel will economically solve data centers' need for high bandwidth . Cabling installation & maintenance. May 1, 2013. Retrieved January 1, 2014.
  19. ↑ Archived copy . Archived from the original on January 8, 2014. Retrieved January 8, 2014.