Call hangs after 15 minutes

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Switch may not be responding to the SIP re-INVITE.

Some providers perform a SIP re-INVITE every 15 minutes for any active calls. It's a way of checking if the call is indeed still active. If an appropriate 200 OK is not received back, they disconnect the call.

SOLUTION:

  • Could be NAT issues.
  • Make sure network is configured properly and all packets reach the Softswitch.
  • Do pcap capture and analyze the logs.
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