Jitsi Desktop_Outgoing call issue

Hi,

I work to call to Korea via jitsi desktop with sip.
there is an error in the outgoing call and I would be grateful if you can see if there is anything that can help me.

  • When calling a Korean landline: Can’t be sent. No signal goes on and is cut off by itself.
  • When calling a Korean mobile: Can be sent. My number is displayed on the cell phone as an international phone number.

My mate is using Jitsi desktop same setting as me.
However, only I am experiencing this phenomenon.

Many Thanks,