Please, I need information about this integration. Here in Brazil, we know that in the USA, the NEC approved with Micros, but I doubt if we will use RS232 (DB9 side OPERA with N24) serial or IP (RJ45 side OPERA with FIAS) interface.
I need to know how to pinout for the serial cable (RJ11 x DB9).

system:
SV8300 Hospitality with:

- Integration PMS - SV8300 x OPERA (ok)
- Integration - UM8000 x OPERA (not ok)

Best regards

Billy Drigla
Salvador, Bahia, Brazil.

You can't just pin out DB-9 to RJ-45. It's a different protocol.

The pinout for DB-9 is 2=receive, 3=send, 5=ground. The cable needs to have exactly one place where pins 2 and 3 change over so that each end has receive => Send and Send => Receive.

To convert RS-232 to IP, you can use this:
https://www.precidia.com/device-networking/device-networking-products/

"RJ45".

Don't get me started on this subject again.