In my company we have a brocade sx800 backbone SW, it is not used for 4 years. Now we need it for new warehouse project.But we don't know what was the ip addresses and no info about this device. When i try to connect with serial cable, nothing happen. How can i reset this device or how can i reach the management interface.

[Connetion with serial cable and console converter][1]

Putty connection screen

  • 3
    Possible DTE/DCE mismatch, or completely wrong pinout in the RJ45 adapter. (I have a small draw full of them because too many nuts think RS232 isn't a standard.) EDIT: try a null-modem adapter.
    – Ricky
    Commented Aug 17, 2021 at 16:04
  • Thanks for your return, i found a null-modem adapter and it worked. Thank you so much Commented Aug 19, 2021 at 14:11

2 Answers 2


Make sure you use the correct serial cable. Additionally, hit [Enter] a couple of times.

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  • Thanks for your reply, but i have tried with different DB9-DTE serial connector and pressed enter like hundreds of times. It still on same screen . Commented Aug 18, 2021 at 6:35
  • tried different serial connectors won't help if none of them has the required pinout - have you verified that?
    – Zac67
    Commented Aug 18, 2021 at 6:40
  • Yes, i verified pinout imgur.com/KV4ybrz Commented Aug 18, 2021 at 7:24

As Ricky pointed out, i found a null-modem adapter and it worked. Thank you so much

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