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Wiring patch leads

Tech Tips (the Preferred standard is A standard)

The Pairing is based on connecting up Active Equipment in succession. In other words, if you are plugging into most modern devices you just need a straight through lead.

Voice:

The PSTN Network Uses the Centre Pairs on an RJ45 or Modular Connection, Pin 4 and 5.

Most Analogue and Digital Systems use the centre Pair to connect Equipment. Only Systems that offer Hybrid Technology use two Pairs for Operation.

Data:

The standard speed for most networks is 100 meg which only uses 2 Pairs, 1000 Meg systems are starting to become commonplace in the industry and will soon take over 100 meg as the preferred medium.

10/100 BaseT Connection uses Pins 1,2 and 3,6

1000 BaseT Connection uses all 4 Pairs

TS568A Wiring 

 

TS568B Wiring

Notes for wiring diagrams above:

  1. For making up patch cables, 568-A wiring is by far, the most common method.
    There is no difference in connectivity between 568B and 568A cables. Either wiring should work fine on any system*. (*see notes below)
    3. For a straight-through cable, wire both ends identical.
    4. For a crossover cable, wire one end 568A and the other end 568B.
    5. Do not confuse pair numbers with pin numbers. A pair number is used for reference only (eg: 10BaseT Ethernet uses pairs 2 & 3). The pin numbers indicate actual physical locations on the plug and jack.
  2. Testing of patch leads should be in conjunction with AS NZS 3087 Part 1 and Part 2.