BPI-R3 serial acces to ONU SFP?

Hello, does someone knows if it is possible to connect to the SFP ONU in serial connection trough BPI-R3 ? I changed my ssh password but something went wrong and I can not access ONU via SSH anymore, that is why I would like to connect via serial. Thank you.

Nope. The hardware doesn’t support that. You would need external hardware for this.

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Than you @Stat_headcrabed