Pinout configuration for DB25 pin console adapter

Answered Question

Hi All

I have a lightstream 1010 ATM router which has a 25 pin Console port. I was wondering if anybody would be able to tell me the pinout required to make up a DB25 pin adapter which I can connect to the octal cable of a 2511 to allow me set up reverse telnet?

If you could give me the color of the cable that goes to pin 1, pin 2 etc it would help a great deal as I have DB25 to RJ45 adapters which I can make up myself.

Best Regards & TIA,


I have this problem too.
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Correct Answer by scottmac about 8 years 6 months ago

My mistake:

Here's the link to the pinout:

Please disregard my first post (and curse Cisco's lack of editing capability)

2, 3, & & would probably work, but you'd likely have to also tie up all the handshake lines from the DTE side.

Good Luck


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Overall Rating: 5 (1 ratings)
scottmac Sun, 05/11/2008 - 08:05

It should use only pins 2, 3, and 7.

2&3 are transmit/receive, pin 7 is signal ground.

Remember to set your terminal program for 9600, 8, N, 1, no flow control (no software control, no hardware control).

Good Luck



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