Imagine you're the CTO of a global enterprise. You've accepted the undeniable reality that communication between your offices comes at a cost--sometimes a hefty one that varies with usage and geographic separation.
Now imagine those interoffice call costs virtually disappearing. Then, imagine your long-distance charges to other enterprises declining. What might be mistaken for an accounting error is actually the result of your astute decision to implement SIP peering. And a standard in the works from the IETF promises to improve communications using SIP peering.
We're hardly strangers to SIP (Session Initiation Protocol) and the dramatic effects it's having on end users, both at home and work. SIP peering is responsible for server-to-server interconnections, providing backbone connectivity between ITSPs (Internet telephony service providers)--or VSPs (voice service providers), in the language of the IETF--and corporate enterprises. These interconnections occur completely in the IP space, using the private or public Internet, never touching the cost-incurring PSTN.