I have a Grandstream HT702 ATA and it has been great for making outgoing calls but will only ring periodically for incoming SIP calls via flynumber.
Because it rings sometimes I am assuming it is not router/firewall related - I am thinking it is the configuration on the HT702… but not sure which setting.
The PBX Panel sometimes says it is “unreachable” so I am not sure if I need to do something to send a “stay alive” signal or something.
Any ideas?
Thanks - I love the PBX panel by the way - a great easy to use and understand system.
OK for a couple of weeks I have been struggling with this, but the moment I post this, change one setting and I think I have fixed it (for now anyway).
You can try to set NAT Traversal: Keep Alive and DNS Mode: SRV
This is only a recommendation, it could help to improve the connection, such issues are hard to determine and might not reside with the device configurations, but in the network equipment/configurations.
Also there are some interesting star codes on this device
So for example you may want to use code *79, maybe DND feature was accidentally enabled, preventing you from receiving calls but this would not influence outbound calls.