VoIP Phones - Asterisk: Difference between revisions
==PJSIP: Keep-Alive / Anti-Idle==
If you are using a firewall or NAT router with short timeouts on UDP sessions you can force packets to be sent over the connection to keep it alive.
An example of the aor section follows:
[aaisptrunk]
type = aor
contact = sip:+442082881111@voiceless.aa.net.uk
qualify_frequency=20
==Note: Asterisk and IPv6 SLAAC addresses==
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