SIPsocial enables SIP phone services over the Internet securely by means of NAT / firewall devices and provides SIP phone users with privacy protection using PKI (Public Key Infrastructure).

SIP phone users can install SIPsocial to:

• use SIPsocial registrar service to register SIP phones and to create a SIP network of phones behind a NAT / firewall,

• use SIPsocial outbound proxy service, from behind a NAT / firewall, to validate PKI public keys and  to establish mutual inclusive connections with other SIP networks of phones,

• build distributed, scalable, secure and privacy protected SIP VoIP networks.

SIPsocial deployments create distributed systems of SIP networks of phones.  The SIP networks of phones provide SIP VoIP phone users the means to build SIP social networks.  SIP social networks are similar to Web social networks in their goals of providing means for people to network, although they use very different approaches.

More information about other SIPsocial apps can be found at  SIPbiz.net. 

SIP Network of Phones

In a SIP Network, the SIP phones register with SIPsocial to receive SIP VoIP calls.  When the call arrives, SIPsocial sends it to the SIP phone using the IP address that was collected through the registration process.

If the SIP Network is deployed behind a NAT (Network Address Translation), it blocks all incoming calls. This is because the NAT, which translates IP addresses between private and public addressing spaces, only allows communications to initiate from private addressing space. The results of NAT functions have created many problems and solutions  for SIP implementations and deployments (NAT RFCs.)  

SIPsocial provides alternate solutions to the NAT problems by:

• creating private SIP Network of phones with private IP addresses as shown in the below diagram,
• enhancing the security of the SIP Network by utilizing the protection provided by the NAT / firewall functions,
• enforcing privacy by applying PKI (Public Key Infrastructure) technology in communications between two private SIP networks,
• enabling SIP VoIP services by providing means to connect the SIP Networks.

A private SIP Network of phones, as shown in the below diagram which includes: SIPsocial, SIP phones, private IP network and NAT / firewall, operates like an IP PBX (Internet Protocol Private Branch eXchange) of SIP phones.

SIP Network of phones can be a business VoIP system, like an IP PBX, designed to deliver voice and video over an enterprise IP network. SIPsocial registrar service of the SIP Network functions like an IP PBX in connecting SIP phones.  One major difference between SIP Network and an IP PBX is the SIPsocial outbound service can connect to other SIP Networks, from behind the NAT / firewall, and only after the successful verification of their PKI public keys. This difference improves the security and privacy protection of the business VoIP system.

SIP Network or SIP Network of phones as shown in the above drawing is an architectural unit designed to scale by

• adding more SIP phones to the SIP Network, and 
• connecting more SIP Networks to the SIP Social Network.

SIPsocial makes possible for a SIP Network to connect, through NAT / firewall, to a network of SIP Networks called SIP Social Network as shown in the following drawing.

SIP Network is constructed using the technologies listed below.

SIP Network Technologies

SIPsocial enables VoIP services by making possible for the SIP phones to network in environments that include combinations of the following:

			SIP Phones		SIP software phone or SIP hardware phone SIP 4G phone (LTE or WiMAX)
			SIP Wireless		LTE WiMAX Wi-Fi
			SIP Infrastructure		SIP over Internet SIP within intranet
			SIP Privacy & Security		SIP Network is a private network behind a NAT  SIP user identity (AOR) in encrypted database  SIP Network connection is mutual inclusive  SIP end-to-end secure signaling via PKI.

SIP Network Applications

SIP Network can create many practical communications applications.  Here are some of them. More information about other SIPsocial apps can be found at  SIPbiz.net.

			SIP Neighborhood Wi-Fi		SIP VoIP network for the neighborhood Collaborative, cost-effective, fault-tolerant
			SIP 4G VoIP		SIP solution for incompatible wireless protocols SIP solution for frequency band mismatch SIP on-net calls for WiMAX and LTE  SIP off-net calls without TDM handoff
			SIP 4G Upload Backhaul		SIP 4G hotspots  SIP 4G hotspot backhaul SIP 4G hotspot upload