Public safety access points are selected in a wireless network for E911 calls based on ESRD substitution when ESRKs are not being used. The present invention was conceived as an ESRK workaround solution to implement Phase II of the E911 rules from the starting point of a Phase I implementation. ESRKs,...http://www.google.de/patents/US8027697?utm_source=gb-gplus-sharePatent US8027697 - Public safety access point (PSAP) selection for E911 wireless callers in a GSM type system
