Hi
:smileywink:
As far as i aware - Opera billing system (found in most of the hotels) using COM-SERIAL connectivity - u must use 3rd party GW to the hotel guests vlan - Like a nomadix.
Here is an example diagram (i deployed a lot of hotel via this topology)
*As u can see the nomadix (Gateway for visitors/guests getting the needed information | billing information via serial cable directly from the hotel/hotels opera server)
hope it clearly you question.
have a lovely week. :smileyhappy:
me