On 25/10/2016 13:08, David Cantrell wrote:
On Mon, Oct 24, 2016 at 09:05:34AM +0100, Someone Somewhere wrote:

... GSM-R ...

Actually - I've just looked and they decided to use different
frequencies which introduced a level of protectionism that seems
unnecessary.

I was under the impression that that wasn't because of protectionism but
to avoid having to share crowded spectrum with the hundreds of people
sitting behind the driver.

GSM has always had the concept of priority and you can still use
different sub-bands within the main GSM bands if you were so bothered.