DB9 to RJ11 connection diagram

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As you give no indication of what you're trying to do, and they are totally different connectors, there's no 'must' involved - could be wired anyway.
 
I have to connect my PC's Serial port to the console port of an other equipment such as a router or a txn equipment.
 
Basically, it is a port named console and is used to connect to PC's serial port, and it is used to take access of the equipment.
 
mnoman said:
Basically, it is a port named console and is used to connect to PC's serial port, and it is used to take access of the equipment.
Click to expand...

Consult the instructions then, on what the pin connections are.
 
Nigel Goodwin said:
You can't connect a serial port to an ethernet port (assuming that's what you mean).
Click to expand...
It's a picky point, but Ethernet uses an 8-pin RJ-45 connector.
AFAIK the RJ-11 is a physically smaller 6-pin connector used mainly for POTS equipment.

That said, Nigel is certainly correct about consulting the documents for the equipment manufacturer since there does not seem to be a standard that I am aware of. If I can find one I'll repost.

This was the #2 Google Hit
https://www.lammertbies.nl/comm/cable/unitronics-rj11.html
But Caveat Emptor
 
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