The special feature of the SI technology is the ability for a single user to set a readiness to receive a call for multiple own public addresses. SI server stores all the received messages with public addresses in association with the technological address of the device, which sent these messages. If another user requests a call to some personal address matching to one stored by SI server it automatically establishes a communication session between calling and called user terminals. Thus, SI multi-address feature does not depend on features of telecommunication networks.
The user is not limited in the ability to define new public addresses or remove any of previously defined at any time. The user can also temporarily disable some of his or her public addresses by changing their presence status with no need to remove them.
These capabilities allows SI personal address set to be flexible, dynamic and manageable in opposition to fixed, static addresses in legacy addressing systems.

Fig. 5. Public addresses of the user.
The SI technology also provides multi-address approach to identification of value-added services, information resources and systems in the same manner. For example, an information resource provider can define multiple public addresses (aliases) actually pointing to the same resource (Fig. 6).

Fig. 6. Public addresses of the information resource.
Multi-addressing of an enterprise or organization allows correction of possible user typing mistakes and prevention of malicious attempts to define a similar address.

Fig. 7. Public addresses of the enterprise.
The special feature of the SI technology is the ability for the user to choose various address formats, each of which creates an independent set of possible unique addresses. Meanwhile, each SI address format practically does not limit a set of possible addresses.
Thanks to these features, even ability to have multiple addresses per customer does not significantly reduce high availability of unique addresses that are at the same time appropriate to the user.

Fig. 8. Space of possible unique SI addresses is substantially greater than address spaces of known addressing systems. |