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Network Rail upgrading 2G to 5G "in the next decade"

Would it really be that difficult considering the electricity and fibre is already there?
 
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Would it really be that difficult considering the electricity and fibre is already there?
NR’s 16,000km of lineside fibre optic cable

NR says the existing cable is near the end of useful life, or is at full capacity, and requires upgrading “imminently.”

there is the issue
 
On those really old looking masts by the railway, just like the one in the articles picture, what's the agreement like? All 4 ops + trains? or only some ops?
 
On those really old looking masts by the railway, just like the one in the articles picture, what's the agreement like? All 4 ops + trains? or only some ops?
it's trains only I believe. Never seen one marked on cellmapper and also never been able to see one on a network scan weirdly
 
On those really old looking masts by the railway, just like the one in the articles picture, what's the agreement like? All 4 ops + trains? or only some ops?
Network Rail run their own GSM-R network:





 
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All across Europe, GSM-R radio interference shows itself in different ways, but, in Great Britain, three fault conditions have been noticed:

The cab radio goes into search mode, causing a lock up and requiring a re-initiation process that takes several minutes during which time the train cannot make or receive emergency calls;
The radio re-boots itself, which is an eight-step start up process that often only gets to step three;
The cab radio screen goes blank, which again necessitates a re-initiation.
If these occurrences were very infrequent, it might be a reasonable risk assessment to live with the problem. However, incidents now number 240 a year, often necessitating stopping the train whilst the re-boot or re-initialisation takes place, causing two to three minutes delay. In total, this results in around 8,000 delay minutes being attributed to GSM-R interference problems.
 
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