Non, alors qu'il y ait des sites, tels que SIPBROKER.com, cela acheminera les appels vers un certain nombre de destinations, vous devrez payer pour un tronc SIP, à un fournisseur.
In order to be able to make calls you will need a SIP Trunk and you usually need to pay to get an account. There are providers that may offer free accounts and free calls between their own network but to have full functionality you will need to pay for one. Here is a list of VoIP providers that are supported by 3CX.