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T1 Crossover Cable Pinout and Circuit

What is T1 Crossover Cable

T1 is a jumper cable that is a reserved circuit that works on copper or fiber optic cable. Used for telephone conversation is one of its main features. It consists of 24 independent channels, modulating the signal using pulse codes and time division multiplexing at a total rate of 1.5 million bits per second (upload and download).

This article is mainly about introducing the T1 pin oout and T1 circuit for your requirements.

T1 Pinout

The T1 cable has 8 pins, each with its own purpose for proper operation. The T1 pin can be found in the figure below:

T1 pinout
T1pinout

The wiring is:

  • 1 – 4
  • 2 – 5
  • 4 – 1
  • 5 – 2

Also the pin configurations to T1 are list as following.

Top (left is cable end, clip underneath):

  • Pin 1: Orange Striped
  • Pin 2: Orange Solid
  • Pin 3: none
  • Pin 4: Blue Solid
  • Pin 5: Blue Striped
  • Pin 6: none
  • Pin 7: none
  • Pin 8: none

Bottom (left is cable end, clip underneath):

  • Pin 1: Blue Solid
  • Pin 2: Blue Striped
  • Pin 3: none
  • Pin 4: Orange Striped
  • Pin 5: Orange Solid
  • Pin 6: none
  • Pin 7: none
  • Pin 8: none

The T1 line originally used copper wire, but now also includes optical and wireless media. A T1 substation system was developed for long distances between cities. Internet access providers are typically connected as pop points to the t1 line owned by the primary telephone network. Many companies also use the T1 line to connect to Internet access providers.

T1 circuit

When I use my Adtran TSU 600 unit with the Digium T100P card, it comes with a T1 through cable, but this setting (and I think all T100P) requires a cross cable. Instead of destroying the attached cable, I created my own cable using the standard Cat-5 cable for ethernet. I had a usable spool and several ends, so I cut a few feet (TSU and server mounting) and got several ends. ( The below diagram is not quite correct. )

It is also useful to check whether the TE4xP card is properly configured or whether the card is working properly. The wiring is:

  • 1 4
  • 2 5 5
  • 4 1
  • 5 2
T1 circuit
T1 circuit
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