requirements_and_architecture_for_emergency_calling----Page:21
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A note on timing Hardest problem is call routing but may only implemented be relatively few systems (proxies) or, at least, can be implemented in proxies only But need to solve call identification real soon now (somewhere): needs to be implemented in end devices very useful even for I2, not just I3 e.g., needed for authorizing location disclosure SIP-specific: could be solved in SIPPING |