Division 7.2.4 Upgrading or renewal of the Control-Command Track-side Assembly or parts of it
United Kingdom
Upgrading or renewal of the track-side assembly may concern separately:
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radio-system (for class B, only renewal is possible),
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train protection system,
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train detection system interface,
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hot axle box detection system,
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EMC characteristics.
Therefore different parts of the Control-Command Track-side Assembly may be upgraded or renewed separately (if interoperability is not prejudiced) and concern:
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EIRENE functions and interfaces (see sections 4.2.4 and 4.2.5);
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ETCS/ERTMS functions and interfaces (see sections 4.2.1, 4.2.3, 4.2.5, 4.2.7, 4.2.8);
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Train detection system (see section 4.2.11);
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Hot axle box detector (see section 4.2.10);
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EMC characteristics (see section 4.2.12).
After the upgrade to Class A system, the existing Class B equipment may remain in use simultaneously with Class A.