Suggestion to issue where one of the cell site CFSB calls are getting blocked when selected preferred mode is LTE

4G LTE
1

Hi… Any suggestion in one of the cell site Csfb calls are getting blocked when preferred mode selected as lte

1040×585 80 KB

Manual mode to GSM calls are getting through

2

Don’t lock the phone to LTE in TEMS

3

It’s in auto mode

4

On what stage is the call getting disconnected? .Also, on call location update needs to be done successfully by ue and mss over SGs intetface.

Are LTE and GSM nodes on different mss?

5

Same. When in LTE mode trying to do a circuit switch call… It should fall back to 2g network… But here Csfb getting blocked

6

What is the solution for pmrrcsecfailintegrity

7

Can u please share snap of events

8

Please check csfb Switches in site

9

Csfb switches are On…

10

Is MT working?

11

Yes, MT is working

12

Ok, please check manual voice call in dual network mode.

Is it working.?

13

Manual also not happening

14

Ok, please check csfb policies. You may also check blind handover switch.

15

Check the cell GSM or eNodeB
The message from block call … T3417 expiry