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RJ21
also called a 50-pin telco connector and has 3 more synonyms

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  1. a registered jack standard for a modular connector using 50 conductors, usually used to implement a 25-line (or less) telephone connection such as that used in the 1A2 key telephone system

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on February 13, 2009
  2. or an Amphenol connector. (The latter is a genericized trademark, as Amphenol was the largest manufacturer of these at one time.) Dual RJ-21 connectors are often used on punch blocks to make a breakout box for PBX and other key telephone systems

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on February 13, 2009
  3. used to aggregated telecommunications cabling

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on February 13, 2009
  4. connectors are used to connect Ethernet ports in bulk from a switch with RJ-21 ports to a CAT-5 rated patch panel, or between two patch panels

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on February 13, 2009
  5. A cable with an RJ-21 connector on one end can support 12 RJ-45 connectors or Ethernet ports on a patch panel

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on February 13, 2009
  6. The same connector (with spring bail locks) is used for SCSI-1 connections. Computer printers use a shorter 36-pin version known as a Centronics connector

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on February 13, 2009
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