Issue description
Users are not able to hear any voice of incoming call but outgoing call is fine.
Alarm information
No.
Handling process
1. Checked whether only 1 or more IP phone is having the issue.
2. Checked all the settings in U1960.
3. Checked the network connection.
4. Captured a wireshark packet and analysed the log.
Root cause
It may be due to the service provider port blocking.
Suggestions
Checked with the service provider of the country.
