The Call Automatically Hang up After 30 Seconds

If you are using a cloud server, pay attention to the following two points:
Go to Basic Configuration -> SoftSwitch -> Sip Profile.

1. Modify the External SIP Address and External RTP Address of the external profile to the public IP address.
   
   

   

   
   
   
   
2. Use port 5080 for softphone registration and testing.
   If you use port 5060, the call may automatically hang up after approximately 30 seconds.