VoIP Phones - Grandstream HT8xx: Difference between revisions
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* NAT Traversal: Keep-Alive (or try stun, with stun.aa.net.uk)
* Register Expiration = 10 (this should be MINUTES)
* Register before expiration = 300 (this should be SECONDS, ie 5 minutes)
These will make the device register more often (every 5 minutes) and send some keep-alive packets to keep NATed session open through your router.
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