Each of your locations in Punchh uses a Point of Sale to communicate back to the Punchh platform regarding a plethora of aspects related to your loyalty structure and loyalty guests.
Generally, a service running on the BOH server at each location manages this communication with the Punchh application. "Proxy based" POS integrations rely on a service and application that is developed by Punchh. Non "Proxy based" integrations are developed by third parties.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)