2.4 GHz is a licence free band. A few years ago it was largely empty, but now it is getting full.
I've had to change the channel of my home network a few times to maintain a good connection due to neighbours installing their networks and not knowing how to do it themselves.
If Bachmann use 2.4 GHz and if they hard-wire in the channel or sub frequency then we're going to have problems. Frequency hopping is one solution, but it is expensive. Channel selection - perhaps using DIP switches is another solution.
Zimo use 433 MHz (in Europe) which is designated as Industrial, Scientific, Medical band. Perhaps Bachmann/ESU will do the same.
For the USA, they will have to use the 900 MHz band.
You can see how the channels of this 2.4 GHz band overlap and can cause interference.
We have 13 available channels here in Europe and it is best to use Channel 1, 7 and 13 if there are multiple networks in the same area. Anything crossing your signal is going to impede the quality of the signal and cause a slowdown and or data loss.
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