3.17.5.1 Client Behavior

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The client retrieves the locationPolicy in-band provisioning group, as specified in [MS-SIPREGE] section 2.2.2.5.7. The location policy indicates whether Enhanced Emergency Services are enabled for the endpoint and if enabled, the location policy specifies the EmergencyDialString, EmergencyDialMask, NotificationUri, ConferenceUri, ConferenceMode, and LocationPolicyTagID for the endpoint. The client obtains its location by either making a request to the location information service, as specified in [MS-E911WS], or by capturing the location based on user input. The client composes the INVITE specified in 2.2.23. The client publishes a time-bound routing category instance of the preamble containing the e911active flag, as specified in section 3.9.5.1.2, to disable all call forwarding rules, as specified in [MS-SIPREGE]. The client sends the previously composed E911 INVITE to the server.