Intermittent call failure for inbound calling

Hello,

I have it working. The trunk config is very simple:

pjsip settings tab:

pjsip advanced tab

The only thing I had to change in the advanced tab was the DTMF and the “From Domain” to the preferred pop server.

Whitelist all of the POP IP’s:

127.0.0.1
147.75.60.160/28
34.210.91.112/28
147.75.65.192/28
34.226.36.32/28

I use the FreePBX 14 firewall:

If you do, make sure to trust all of the POP networks in the firewall for UDP/TCP/whatever traffic.

Make sure in your Settings/Asterisk Sip settings you have your external address and applicable local network if need be:

In the chan PJSIP tab, I have the following on my wildcard transport for UDP:

Insure that you have configured an inbound route on flowroute correctly. This is key depending on what type of authentication you are using and method of routing strategy NAPTR/A record, etc.

Make sure you have routed the DID/s to the inbound route you created.

Under the Reports Tab for PJSIP you should see something like this:

As you can see, all of the Flow Route POP’s are matched.

I hope this helps.