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The Context for VoIP Peering
If it originates on IP and terminates on IP, why convert it to something else in the middle?
Adds cost and complexity (operational & network).
Decreases control over:
User Experience
Services & Quality
Network / Troubleshooting
So… Keep communications IP-based, end-to-end.
IP networks are generally private & free of traditional telecom regulation.
Helps make possible new, broadband IP-based services, not possible via PSTN.
Many big economic and strategic motivations…

PPT Version