The device will send every 20 seconds (default) an UDP/TCP package to the platform to keep the NAT firewall open. - NAT refresh timer is set by default to 20 seconds.
- Timer can be changed.
- Timer = 0 means feature is disabled.
- Feature is an platform setting, if device has more SIP accounts, it does not send an UDP package per SIP account. It sends only one package every 20 seconds.
- SIP Registration fail/disabled has no influence on the feature.
- UDP and TCP is supported, depends on platform setting.
- Merkur will send UDP / TCP packages containing only 2 x CR,LF
192.168.178.29 213.30.181.53 UDP 5060 → 5060 Len=4
Data (4 bytes)
Data: 0d0a0d0a
[Length: 4]
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