SIP-addressing is logical, of the same type as URL in HTTP. And the most natural – to use the electronic mail as the SIP address. There are permissible varied parameters by the address: for example, it is possible to indicate the regular city telephone number, additional telephone, and the parameters of modem connection etc.
LEAD TELECOM is a wholesale VoIP carrier incorporated in Miami (Florida), with headquarters in the state of Florida, and collocation facilities in New York – EQUINIX and Miami - NAP