First of all, I'm by no means a network admin, please keep that in mind.
We're experiencing issues with our VoIP calls, it always has a delay in communication when making external calls.
Our setup:
- Ubiquiti Edgerouter (Previously Fortigate 60D, same issue though), We have a 200/20Mb Coax Internet connection (Provider is Ziggo, Dutch ISP), Edgerouter connected to their Modem
- (Setup QOS on the Edgerouter for DSCP 24 & 46, Also checked with Wireshark that these values are in fact being send out)
- All Switches are Ubiquiti Edge switches 1 Gbps
- Seperate VLAN for VoIP, Office, Etc
- 3CX Server, 2 UniFi VoIP Phones
- My ping time to google DNS is roughly ~12 ms
When I do an local call, from 1 VoIP phone to another I have no issues at all. No latency. When I make an outbound call it's really noticeable. Probably half a second of delay. I've done all I could think of, so that's why I'm reaching out for help..
Things I've tried as well:
- Lowest bandwith codecs
- Registerd VoIP Phone directly to our VOIP provider (voys.nl), same issue
- Unplugged all my equipment, only had the VoIP phones and 3CX server on the network, same issue
IS it a reasonable possibility, our ISP itself the issue?? I've got no idea what other steps I can take to test things.
Advice would be greatly appreciated!
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