Yes, I've seen the threads of the previous VoIP issues. However, those are dated.
My issue is that I've got 8 phones that register with an external service. Registration works fine. Calls work fine. The issue is QoS. The distant-end can hear my site just fine. My site gets intermittent null spots during calls. QoS has been configured. I tried both IP Precedence and DSCP - neither resolve the issue.
I think it may have something to do with the SPI process. When I take the SRX out of the network path and use a WNDR4300, no null spots.
Is there a way to turn off SPI on specific LAN interfaces?
When we were actively using VOIP (have since returned to a land line system, due to the VOIP provider having some issues) we found that we had to uncheck 'Block TCP flood', in order to get proper calls 100% of the time.
Security->Firewall->Attack Checks
There was no easy way, that I've ever found, to disable it on a per port basis.
