Hi , 1st of all i must say 3cx is awesome product work on windows till now we use only Linux base free SIP server. well here what i am looking to do with 3cx i want you ppl to give me some world of advice as it can be done by 3xc or not. We have HO office and 3 international branch offices all connected to VPN , we want to keep 3cx server @ HO with PSTN analog gateway for outside PSTN dial on HO Country and all 3 branch office i ll keep one PSTN analog getaways for respective County PSTN dial. And I ll configure Routing Rule in 3CX for 0091 to send to HO analog getaway and 0092 to Branch X and 0093 to Branch Y . so from HO anyone can call any number at branch country local PSTN without any international call change plus inter office calling. Can this be done by 3CX and which is best compatible Analog PSTN gateway with 1-2 line I should use ? Our Goal is to connect all branch office with Voice plus users from any branch office and HO office can call any local PSTN numbers on all branch offices countries and HO.