Intermittent Silence on external calls

[Ben Newall]

Hi All

I am really hoping someone might be able to help me with this...

So far it is the only issue we have had with 3CX since going live a month ago. I just want to say I am very impressed overall with the system, it has allowed us to move from 3 separate analogue systems to one modern setup linking all of our sites together and combined with the move to SIP is saving us over £700/month in telephone costs!

The Problem
We are experiencing an issue where suddenly, external calls have no audio. It seems to happen once a day or once every other day. Once it happens, all external calls have no sound whatsoever and the only way to get it back to normal is to restart the Media service. Internal calls are unaffected.

Our Setup
We have 3 sites, a head office and two branch offices. These are all connected by IPSEC VPN tunnels. Our 3CX server is a Windows 2012 VM which is dedicated just for 3CX only. We got our two branch offices onboard first, and they work flawlessly for 3 weeks. Then finally we put our head office onboard which involved a lot POE switches being deployed as it is an old building with limited data cabling. After our head office came on to 3CX we started experiencing this issue.

Thanks in advance to anyone who takes the time.

 

[leejor]

Run the 3CX firewall checker and be sure that al required audio ports (9000 to 10999) are forwarded correctly.

https://www.3cx.com/docs/ports/

 

[Ben Newall]

Run the 3CX firewall checker and be sure that al required audio ports (9000 to 10999) are forwarded correctly.

https://www.3cx.com/docs/ports/

Thanks pal, it was closed ports on the firewall. >.< doh!

 

[leejor]

The ports have increased over that last few 3CX updates. It seems that many forget, or don't realize, that their router must also be changed to reflect this.

You're not alone.