Here is an instruction how to get cable/pinout information:
1. be sure that you have downloaded and installed latest Infinity-Box Pinouts update: Infinity-Box - News
2. run Infinity-Box Shell
3. select required model
4. see detailed information about cable/pinout (Rx/Tx/Gnd pins and other information)

Here is an example of information given by Infinity-Box Shell.
It's just an example for Alcatel, if you have another model you must select your model !

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RJ45 connector pinout:
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