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  • Pdf Drawing... 
  • Black GigaBase2 CAT5e Jack with Universal Wiring
    Drawing for the FMT921-R2 and FMT921-R2-25PAK.
 
  • Pdf Drawing... 
  • CAT3 Jack (Gray) PDF Drawing
    PDF Drawing for the FMT367-R2 and FMT364-R2-25PAK (Version 1)
 
  • Pdf Drawing... 
  • Ivory GigaBase2 CAT5e Jack with Universal Wiring
    Drawing for the FMT922-R2 and FMT922-R2-25PAK.
 
  • Pdf Drawing... 
  • USOC RJ-11 Jack (Blue) PDF Drawing
    PDF Drawing of the FMT238 and FMT238-25PAK (Version 1)
 
  • Pdf Drawing... 
  • CAT3 Jack (Green) PDF Drawing
    PDF Drawing for the FMT368-R2 and FMT364-R2-25PAK (Version 1)
 
  • Pdf Drawing... 
  • Gray GigaBase2 CAT5e Jack with Universal Wiring
    Drawing for the FMT923-R2 and FMT923-R2-25PAK.
 

Black Box Explains… Category 7/Class F.


Category 7/Class F (ISO/IEC 11801:2002) specifies a frequency range of 1–600 MHz over 100 meters of fully shielded twisted-pair cabling. It encompasses four individually shielded pairs inside an overall shield,... more/see it nowcalled Shielded/Foiled Twisted Pair (S/FTP) or Foiled/ Foiled Twisted Pair (F/FTP). There is a pending class Fa, based on the use of S/FTP cable to 1000 MHz. It can support 10GBASE-T transmissions.

With both types of cable, each twisted pair is enclosed in foil. In S/FTP cable, all four pairs are encased in an overall metal braid. In F/FTP, the four pairs are encased in foil.

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, which was launched in 1999.

Category 7/Class F is backwards compatible with traditional CAT6 and CAT5 cable, but it has far more stringent specifications for crosstalk and system noise. The fully shielded cable virtually eliminates crosstalk between the pairs. In addition, the cable is noise resistant, which makes the Category 7/Class F systems ideal for high EMI areas, such as industrial and medical imaging facilities.
Category 7/Class F cable can also increase security by preventing the emission of data signals from the cable to nearby areas. collapse

  • Pdf Drawing... 
  • USOC RJ-11 Jack (Black) PDF Drawing
    PDF Drawing of the FMT239 and FMT239-25PAK (Version 1)
 

Black Box Explains...Alien crosstalk.

Alien crosstalk (ANEXT) is a critical and unique measurement in 10-GbE systems. Crosstalk, used in 10/100/1000BASE-T systems, measures the mixing of signals between wire pairs within a cable. Alien Crosstalk,... more/see it nowin 10-GbE systems, is the measurement of the signal coupling between wire pairs in different, adjacent cables.

The amount of ANEXT depends on a number of factors, including the promixity of adjacent cables and connectors, the cable length, cable twist density, and EMI. Patch panels and connecting hardware are also affected by Alien Crosstalk.

With Alien Crosstalk, the affected cable is called the disturbed or victim cable. The surrounding cables are the disturber cables. collapse


Black Box Explains...Category 6.

Category 6 (CAT6)–Class E has a specified frequency of 250 MHz, significantly improved bandwidth capacity over CAT5e, and easily handles Gigabit Ethernet transmissions. In recent years, it has been the... more/see it nowcable of choice for new structured cabling systems. CAT6 supports 1000BASE-T and, depending on the installation, 10GBASE-T (10-GbE).

10-GbE over CAT6 introduces the problem of Alien Crosstalk (ANEXT), the unwanted coupling of signals between adjacent pairs and cables. Because ANEXT in CAT6 10-GbE networks is so dependent on installation practices, TSB-155 qualifies 10-GbE over CAT6 up to 55 meters and requires it to be 100% tested. To mitigate ANEXT in CAT6, it is recommended that you unbundle the cables and increase the separation between the cables.

You can always contact Black Box Tech Support to answer your cabling questions. Our techs can recommend cable testers and steer you in the right direction when you’re installing new cabling. And the advice is FREE! collapse

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