Dispelling LTE Myths
Wireless Week
However, 3GPP recognizes that adoption of both LTE and IMS will not occur overnight. For this reason 3GPP provided a transition solution for voice called CS ...
…VoIP support for emergency calls (including location support) is specified as part of Rel 9. This fulfils the last regulatory requirement separating VoIP from CS in 3GPP networks. A transition solution exists which is falling back to 3G/2G for completing emergency calls. This solution has existed since IMS was introduced (Rel 5). …
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