How to set UChannel ticking rate? Is it tied to framerate?

I’m currently studying the network layer in Unreal because I would like to limit latency (I’m on LAN) on the Voice Channel.

So I’m starting to look at the tick rate of the network driver and more precisely of the voice channel.
What I ended up to see is that UWorld::Tick ticks everything from rendering to network. Does that mean that network ticking is tied to the framerate?
It seems very strange to me and I suppose it’s not the case, but I can’t find a way to set the ticking rate specifically for one UChannel…

Thanks for your help!