If you're having problems with SIP and calls cutting off after 15 mins, it could be a problem with firewall configuration.

To fix it, check the following:

  • Consistent NAT is enabled.
  • Single Sign On Authentication Packet is turned off or disabled.
  • NAT Refresh Timer is greater than 120 seconds - it may also be called NAT Timeout or UDP Inactivity Timer.
  • SIP ALG is disabled - it may also be called SIP Transformation.

If this doesn't work, then contact us.


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