Hi saman,

Have you noticed the information available on the following website? I have found some relative useful information there.

http://www.networkrail.co.uk/using-our-network/on-train-metering/

I hope that it may help you out.

Hi dear Adel,

Thanks for your attention my friend. At my first glimpse of the link you shared, I found many helpful documents as I wanted. 

Thank you so much again. I hope you're doing great.

Oh! I was not really sure of that being helpful. I'm glad that you've used that link.

Then, you're welcome.