[Asterisk-Users] Results of an incorrect crossover pinout??

John Crowhurst fyremoon at fyremoon.net
Fri Oct 7 06:33:37 MST 2005


On Fri, October 7, 2005 4:58, Steve Totaro said:
> I bet it's the crack ;)
>
> How could you have a pinout listed first?  If the wire on one side of the
> cable is going from pin one to pin four on the other side and two is going
> to five on the other side then its correct and complete.  I never
> understood
> why the second set of numbers.
>
> 1-4
> 2-5
>
> Thats it.

The pinout for this connector (called RJ48C) is:
1=RX1
2=RX2
3=FGND
4=TX1
5=TX2
6=FGND
7=N/C
8=N/C

For a loopback adapter, you would join pin 1 to 4 and pin 2 to 5.

If you crossed over one of the pairs, the cable shouldn't work, it will
probably give a link, but signalling won't work.

-- 
John



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