Open Settlement Protocol (OSP) is the European
Telecommunications Standards Institute (ESTI) Technical Specification 101 321
for Inter-Domain pricing, authorization and usage exchange. Is a
client/server protocol that
Internet Service Providers use to exchange authorization,
accounting, and usage information to support
IP telephony. The OSP protocol is often used with Public Key
Infrastructure (PKI) services to implement secure,
multi-lateral VoIP peering on non-secure networks, such
as the Internet.
European Telecommunications Standards Institute (ETSI) Home page of the European Telecommunications Standards Institute (ETSI). Look here to find out current standardization projects, ETSI publications, papers on the challenges of standardization, and other resources.
ETSI TIPHON Telecommunications and Internet Protocol Harmonization Over Networks
