networking experts, Help with DB9-RJ45 connector

[frinkofox]

would you please tell me how to wire a DB9 to RJ45 connector?
or give me a useful link ?



thanks experts

 

[amdskip]

I used google and all I could find was various adapters.

 

[DocDoo]

depends what you are trying to connect to...

Anyway, RJ45 -to- DB9 adapter here (RS232)

 

[L3Guy]

would you please tell me how to wire a DB9 to RJ45 connector?

There are several situations where there is no passive converter between RJ-45 and DB9.
Also, there is no standard for RS-232 over UTP that I am aware of. In that case, the brand of equipment will be necessary.

If its T-1 / PRI, I can look it up.
Cisco Console cable, no big.
If its localtalk to ethernet. No Dice. (Real Router)
If its Token Ring to Ethernet, (real) Router.
If its T-1 to ethernet, ...

I had a co-worker that wanted to make a magic cable from Localtalk to Token ring for a client. He simply did not believe that since both had DB9 connectors, that they were not electrically compatible. I gave him an I.D. ten T award for his efforts.

Let us know what it is and who makes it and we can probably answer.

Hope this helps;

Doug

 

[frinkofox]

I need it for a serial COM port on a PC to Cisco console cable
thanks

 

[DocDoo]

This is from memory so please double check this before terminating this connector.

PIN -------|------ PIN

RJ45 -----|----- DB9
1 ----------------8 (CTS)
2 ----------------6 (DSR)
3 ----------------2 (RxD)
4 ----------------5 (GND)
5 ----------------5 (GND)
6 ----------------3 (TxT)
7 ----------------4 (DTR)
8 ----------------7 (RTS)

 

[frinkofox]

thanks but where to double check it?

if the scheme is wrong is it possibe to burn a circuit ?

 

[spidey07]

some cisco devices have different pinouts.

Please post model number.

-edit- this may help and is used on almost all routers and switches.http://www.cisco.com/en/US/products/hw/switches/ps646/products_installation_guide_chapter09186a00800c9eb5.html#xtocid15

 

[Tallgeese]

Originally posted by: L3Guy
I had a co-worker that wanted to make a magic cable from Localtalk to Token ring for a client. He simply did not believe that since both had DB9 connectors, that they were not electrically compatible. I gave him an I.D. ten T award for his efforts.

HAHA! That's hilarious!
Thanks for the laugh Doug!

 

[DocDoo]

Originally posted by: frinkofox
if the scheme is wrong is it possibe to burn a circuit ?

No you won't burn anything. This is really just a data port. But no point in throwing darts at it

By looking within the link spidey gave you, my DB9 pin configuration is correct. But like we all said, it boils down to your "specific" hardware model. You will know you did good when you get a reply from AT or #status