What are the causes of silent calls and what are the possible solutions?

RAN
1

Can someone explain the causes of silent calls and possible solutions?

2

Which vendor?

3

Check the transmission connection

4

The vendor is ZTE

5

In case if it is one site

6

More than one site and it happens intermittently

7

On Zte its very rare you get mute call. If it is you can check packet loss, any issue of transmission.

8

Most probably transmission issues

1 Like
9

Can transmission issues like high BER cause it?

10

Yes, they can

11

Or faulty stm

12

And on what scenarios these happens?

13

At times one way at times 2 way

14

is this GSM?

15

Yes it is GSM

16

Are those mute calls made within the home network or are made inter-network?

17

I think yon need to check is the AMR codec mode sets are aligned.
It is also possible that there is some problem on MGW side, so ask CN guys to help investigate this issue.

19

Dear experts,

What are the main causes for LTE silent call and how to analyze cases?

20

They are most often caused by transmission issues. Approach your RAN and Tx team to help out.

21

Is there any tool for analyze single user trace cases?