Emergency Service Identifiers draft-ietf-sipping-sos-01 draft-schulzrinne-sipping-service-01
https://www.powershow.com/view4/6a6246-MWM4N/Emergency_Service_Identifiers_draft-ietf-sipping-sos-01_draft-schulzrinne-sipping-service-01_powerpoint_ppt_presentation
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