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Simple usage scenario for SIP An alternative to present SIP CS usage (complex) Tool set for implementations includes NAT traversal, ID, encryption Applicable for CS and P2P SIP SIP for message routing only (~10 ref’s + info’s) All applications reside in endpoints Eliminate all “network services” All extensions to support business models Ever new business models: Is not scalable, Not for applicable for everyone Avoid complexity in SIP routing: Unaware of apps Avoid any awareness of user data and the associated policies in network elements (use certified identity for apps) |