Inbound calls suddenly not working

[ZTX1]

Hi there,
our 3CX server seems to be working fine UNTIL something happens and no calls are coming in. We can make calls and we can call from extension to extension and we are not aware of the problem until costumer calls our cell phone or send an email. Rebooting 3cx from Dashboard fixes the issue immediately.

We are using the same trunk provider on another 3cx system and we have similar issue (but not at the same time).
On FreePBX however, we never have this issue and we are using same SIP provider.

Any ideas how to fix this? Is there any way to get notified when our system becomes unavailable?

Thank you

 

[jcostlow]

When the incoming calls stop working are all services on 3CX running? Does the event log show any errors?

Wouldn't hurt to run a packet capture and call in to see if the call reaches 3CX from the carrier.

 

[leejor]

Does the 3CX Activity Log offer any help/clues?

 

[cobaltit]

https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

Firewall checker passing? Supported SIP trunk provider? Smart firewall in front of this 3CX?