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major outage of midwest

thensley1983
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ingenium Member Level: 4G WiMax

ingenium

Posted
Posted

I think it's more likely a local IMS server went down. I wonder if voice and text would have worked if in 3G only mode.

 

Sent from my Nexus 6

techfranz Member Level: 1x Advanced

techfranz

Posted
Posted

I think it's more likely a local IMS server went down. I wonder if voice and text would have worked if in 3G only mode.

 

Sent from my Nexus 6

If anybody learns what caused the issue, please let us know.

RAvirani Member Level: LTE Advanced

RAvirani

Posted
Posted

I think it's more likely a local IMS server went down. I wonder if voice and text would have worked if in 3G only mode.

 

Sent from my Nexus 6

Sprint doesn't have IMSs. There is no voice over LTE...

ingenium Member Level: 4G WiMax

ingenium

Posted
Posted

Sprint doesn't have IMSs. There is no voice over LTE...

They actually do have IMS, it's used for SMS over LTE, and I believe it also plays a role in eCSFB.

 

Sent from my Nexus 6

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RAvirani Member Level: LTE Advanced

RAvirani

Posted
Posted

They actually do have IMS, it's used for SMS over LTE, and I believe it also plays a role in eCSFB.

 

Sent from my Nexus 6

 

Wait what this is news to me

RAvirani Member Level: LTE Advanced

RAvirani

Posted
Posted

They actually do have IMS, it's used for SMS over LTE, and I believe it also plays a role in eCSFB.

 

Sent from my Nexus 6

 

How is the IMS involved in eCSFB?

ingenium Member Level: 4G WiMax

ingenium

Posted
Posted

How is the IMS involved in eCSFB?

I'm not certain it actually is. I can't find anything that confirms it, so I may be mistaken. My understanding though was that eCSFB and IMS were coupled together (maybe IMS sends the initial message to switch to CDMA?). The closest I could find was the last page of this thread http://www.s4gru.com/index.php?/topic/5001-Breaking-Band:-Tri-band-LTE-/-eCSFB-issues-thread

 

Sent from my Nexus 6

RAvirani Member Level: LTE Advanced

RAvirani

Posted
Posted

I'm not certain it actually is. I can't find anything that confirms it, so I may be mistaken. My understanding though was that eCSFB and IMS were coupled together (maybe IMS sends the initial message to switch to CDMA?). The closest I could find was the last page of this thread http://www.s4gru.com/index.php?/topic/5001-Breaking-Band:-Tri-band-LTE-/-eCSFB-issues-thread

 

Sent from my Nexus 6

Huh. What's weird is on my att iPhone, in settings>general>about there is a thing called "IMS Status" and its value is "Voice & SMS" but I can't seem to find that on my sprint iPhone. I have also seen this on tmo and vz iPhones...

Vince Member Level: 4G LTE

Vince

Posted
Posted

Huh. What's weird is on my att iPhone, in settings>general>about there is a thing called "IMS Status" and its value is "Voice & SMS" but I can't seem to find that on my sprint iPhone. I have also seen this on tmo and vz iPhones...

That's because Sprint doesn't send SMS over wifi calling on the iphone. It says only "voice" in that field on a sprint variant.

 

 

Sent from my iPhone 6+ using Tapatalk

RAvirani Member Level: LTE Advanced

RAvirani

Posted
Posted

That's because Sprint doesn't send SMS over wifi calling on the iphone. It says only "voice" in that field on a sprint variant.

Sent from my iPhone 6+ using Tapatalk

What about SMS over LTE?

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