Black Box DESKTOP TELCO Especificaciones descargar pdf (Pagina 13)

724-746-5500 • blackbox.com

Cabling

Category 7/Class F is only an ISO/IEC 11801:2002 standard

and is not in a draft stage by the TIA. It’s designed to meet or

exceed the requirements of 10-Gigabit Ethernet. The standard

specifies a frequency of 1–600 MHz over 100 meters of fully

shielded twisted-pair cabling.

Category 7/Class F cable consists of four individually shielded

pairs inside an overall shield. It’s called Shielded/Foiled Twisted Pair

(S/FTP) or Foiled/Foiled Twisted Pair (F/FTP). With both, each twisted

pair is enclosed in foil. In S/FTP cable, the four pairs are encased

in an overall metal braid. In F/FTP, the four pairs are encased

in an overall foil shield.

The fully shielded cable virtually eliminates crosstalk between

the pairs. In addition, the cables are noise resistant, making the

Category 7/Class F system ideal for high EMI areas. It’s well suited

for applications where fiber optic cable would typically be used—

but costs less.

Category 7/Class F cable can be terminated with two interface

designs as specified in IEC 6063-7-7 and IEC 61076-3-104. One is an

RJ-45 compatible GG-45 connector. The other is the more common

TERA

connector launched in 1999.

Category 7a/Class F

is a pending ISO class based on the use

of S/FTP cable to 1000 MHz.

10-GbE and twisted-pair cable.

The cabling industry is developing two different standards that

can be used in 10-GbE applications. One is for use with Category 6

(CAT6) cable, and one is for Augmented Category 6 (CAT6a). These

standards specify requirements for each component in the channel,

such as cable and connecting hardware, as well as for the permanent

link, and the channel.

10-GbE using CAT6. The first set of standards define cabling

performance when using Category 6/Class E cabling for 10-GbE

applications. The TIA/EIA version is the Technical Systems Bulletin

155 (TSB 155). ISO/IEC TR 24750 is a technical report that details

measuring existing Class E systems.

No matter what the cable length is, CAT6 cable must meet 10-GbE

electrical and ANEXT specifications up to 500 MHz. However, the

CAT6 standard now specifies measurements only to 250 MHz, and it

does not have an ANEXT requirement. There is no guarantee CAT6

can support a 10-GbE system. But the TSB provides guidelines

for ways to help mitigate ANEXT. One way to lessen or eliminate

ANEXT altogether is to use shielded cable and equipment, such

as F/UTP cable. Another way is to follow mitigating installation

techniques, such as using non-adjacent patch panels, separating

equipment cords, unbundling horizontal cabling, avoiding areas

of high EMI, etc.

10-GbE using CAT6a. The second set of standards will define

Augmented Category 6 (CAT6a) and Augmented Class E (Class E

)

cabling. The newer, augmented cabling systems are designed

to support 10-GbE over a 100-meter horizontal UTP channel.

The TIA/EIA version is in draft as of mid 2007 and will be

published as ANSI/TIA/EIA-568B.2-AD10. It recognizes both UTP

and STP CAT6a systems. It extends CAT6 electrical parameters such

as NEXT, FEXT, return loss, insertion loss, and more to 500 MHz.

It also specifies near- and far-end Alien Crosstalk (ANEXT, AFEXT)

to 500 MHz. It also goes beyond IEEE 802.3an by establishing

the electrical requirements for the permanent link and cabling

components. The ISO Class E

standard will be published

in a new edition of the 11801 standard.

Comparison of Categories and Classes

TIA TIA ISO ISO

Frequency

(Components) (Cabling) (Components) (Cabling)

1-100 MHz CAT5e CAT5e CAT5e Class D

1-250 MHz CAT6 CAT6 CAT6 Class E

1-500 MHz CAT6a CAT6a CAT6a Class E

1-600 MHz n/s n/s CAT7 Class F

1-1000 MHz n/s n/s CAT7

Class 7

10-GbE Cabling

Link Segment

Cable Standard Distances

CAT6/Class E

Unshielded TSB-155, ISO/IEC TR-24750 55 (37*) m to 100 m

Shielded TSB-155, ISO/IEC TR-24750 55 (37*) m to 100 m

CAT6a/Class E

TIA/EIA-568-B.21-AD10 100 m

Unshielded ISO/IEC 11801 2.1

Class F ISO/IEC TR-24750 100 m

Shielded

NOTE: For S/FTP and F/UTP cable, see blackbox.com.

* TSB-155 allows 37 meters in CAT6 installations without mitigation.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 47 48

Comentarios a estos manuales

Sin comentarios

Black Box DESKTOP TELCO Especificaciones Pagina 13

Comentarios a estos manuales

Relacionado con productos y manuales para Redes Black Box DESKTOP TELCO