You connect any kind of device, server, switch, or software that support one of the 2 protocols we offer (SIP, IAX2) and at least one of the codecs offered to our server. You can authenticate by IP address or dynamic registration, which is supported by almost every piece of VoIP software and hardware on the globe. You can configure multiple devices with different usernames by using our sub account section. When you place calls, we terminate them for you. You can also order DID numbers. When people call these numbers, we send them to you via VoIP.