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How is the emergency call (for example, 112 or 911) selection, GSM or VoIP, made?

April 26, 2017emergency GSM selection voip

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How is the emergency call (for example, 112 or 911) selection, GSM or VoIP, made?

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• In dual mode handsets with Nokia VoIP framework capability, an emergency call is always tried first as a cellular (GSM/WCDMA, that is, circuit switched) call if cellular coverage is available. The cellular emergency call recognition and procedure are done as specified for cellular emergency calls. Only if cellular coverage is not available for a circuit-switched emergency call, the dual mode terminal will try to make the emergency call as a WLAN VoIP call.