In some areas we have problems with CSFB MTC only with IPHONE mobiles. Has anyone ever seen this problem on your network?

4G LTE
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1

In some areas we have problems with CSFB MTC only with IPHONE mobiles. Has anyone ever seen this problem on your network?

2

What kind of problems?

3

The IPhone does not do CSFB during MTC.

4

The call is handled on 3g? I mean rnc to msc directly?

5

We have only 2G and 4G in these areas

6

U need to check weather the iPhone does combined attach or not,

7

others mobile like samsung are Ok. MTC goes do 2G during CSFB

8

U need to check weather the iPhone does combined attach or not,

How friend?

9

And whether the MME sending the SGS application location update or not

Oh OK, what’s ur domain? Are u from Radio, wireless or core?

10

Friend the settings are ok because others mobiles (samsung, motorola) are working

only IPHONE does not go to 2G

11

First of all let me know what’s ur domain?

12

and only during the MTC…MOC.are ok

First of all let me know what’s ur domain?

CS

13

Okay

While testing the Mt call, does the msc send SGSAP paging? To the MME? Or not?

14

Yes…The MSC sent a paging

15

Is it sgs paging? Or cs paging?

16

[…]

SGSAP. See above.

17

Okay then does the MME forward this paging go the eNBs? With CN domain (cs)?

18

Okay then does the MME forward this paging go the eNBs? With CN domain (cs)?

Yes

19

Very good, then the eNBs replies back with extended service request after the ue paging is successful?

20

Only one iPhone or whole iPhone doesn’t work?

Did you trace from core end?

Core guy will do the trace for that iPhone while doing csfb test