Here you must configure at least one SIP account, that you
will use to register with this service. Use this account either in an Analog Telephony
Adapter (ATA), or in a SIP software like CSipSimple, Linphone, or Sipdroid on your
smartphone, or Ekiga, Linphone, or X-Lite on your computer. By default, all SIP accounts
will ring simultaneously if a call is made to one of your VoIP provider accounts or GV
numbers.