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LTE voice call follow the cuircuit switch path or packet switch path

+1 vote
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Since the LTE networks are usually evolved from a GSM or CDMA network with a circuit-switched path, are calls from LTE-capable handsets still prioritized on the circuit and then thrown on the packet-switched route for a VOIP call if that path is full? Or is it the other way around.

posted Jul 22, 2013 by Sonu Jindal

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1 Answer

0 votes

I think it will be a phone setting. I would imagine, by default it should route to PS domain, only in case where there is no 3G/4G coverage it would fallback to CS.

answer Jul 25, 2013 by Chandra Javalkar
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+3 votes

In LTE, everything is based upon Packet Switch.. Right? Then, What happens if Circuit Switch Mobile tries to connect LTE mobile?

In Packet Switch any communication is possible based upon IP address.. Right? We are not getting IP unless we connect over mobile to Internet (after the attach procedure IP will be with SGW, Not with the UE) (Tested). So, Is it not possible to make/receive a call without connecting with internet?

Basics but very confusing..Please help


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