Page 604 - IRSEM_Main Book

S No Term Description/Meaning in SEM Relevant paras
It is a type of Signalling, in which a signal can show only two aspects i.e Stop/Proceed for Stop 14.1.7 (a), 14.1.8 (b)
Two-Aspect
167 Signals and Caution/Proceed for Permissive Signals. No pre-warning of aspect of next signal in
Signalling
advance is possible.
Universal
3.5.3(a),
Failsafe Block
168 Universal Fail Safe Block Interface (UFSBI) is an Equipment used in Block working. 18.2.2(c),18.10.1,
Interface 21.1.1(d)
(UFSBI)
Confirmation, through the provision of objective evidence that the requirement for a specific 3.7.1(b)(f), 9.2.3(f),
169 Validation
intended use or applications have been fulfilled. 11.1.3(i)
Confirmation through the provision of objective evidence that specified requirements have 17.3.13, 17.7.5(a)(c),
170 Verification
been fulfilled. 20.1.5(d),
7.7.1(a), 7.7.5,
Video Display It is display device cum controlling device. Used in Electronic Interlocking to operate Signals &
171 8.1.8(a)(v), 8.7.15,
Unit (VDU) Points, Crank Handles etc and also for getting display of Field status of them.
21.1.15, 21.4.2
Audible and/or visual indication to alert the driver to a condition which requires a positive 7.2.1, 7.3.1, 14.1.9(a)
172 Warning
action by the Loco Pilot.

Annexure: G4: Glossary of Technical Terms for Signal Engineering Manual Page 530 of 535