We have problems with the quality of audio/video calls in our office. We get much better quality using mobile LTE connection than our fiber link. LTE connection always goes HD, but the fiber connection almost always gets stuck at lower quality.
Our ISP provides us 60 Mbit/s download and 16 Mbit/s of upload. Average latency is around 20ms and jitter seems to be 10ms. They say everything seems to be fine, but our calls quality is bad. We've also upgraded our bandwidth (we had 30/8), but it didn't help. Most of the time we have a single call running.
Since it's the only ISP in our office location, we can't change it. So I see 2 options. First is that it's something in our network. But we tested it and there's no packet loss, or significant latency, or jitter at the path to our router, so it seems unlikely. Second is that it's something in the ISP's network or they have low QoS offered from the backbone. Since we can't do much about it, we'd like to set up a separate mobile LTE connection that will be used for video/audio calls. We mostly use Skype, Hangouts, Uberconferece or Gotomeeting. Is there a network solution that automatically route such traffic through a separate WAN connection? It seems that we can't know the IP addresses used by these services so we can't do that using routing tables. We're also thinking about setting up a separate WiFi network for the calls, but we're afraid that when people finish the call, they will stay on the network designated for calls and make it congested by regular web traffic. Ideally, we'd like people to be automatically switched back to the other network when the call finishes. Alternatively, some kind of pop up could show up on their computer asking if they require to stay on the wifi network for calls if they stay connected for more than 30 mins for example. Is there a good solution for such a problem?