Section 821-01: General concepts and terms |  |
| 821-01-01 | | railway signalling |  |
| 821-01-02 | | security apparatus, <for railways> |  |
| 821-01-03 | | signalling system, <for railways> |  |
| 821-01-04 | | lineside signalling |  |
| 821-01-05 | | automatic signalling |  |
| 821-01-06 | | continuous signalling |  |
| 821-01-07 | | intermittent signalling |  |
| 821-01-08 | | route signalling |  |
| 821-01-09 | | speed signalling |  |
| 821-01-10 | | fail-safe, adj |  |
| 821-01-11 | | safety installation |  |
| 821-01-12 | | section regulator |  |
| 821-01-13 | | regulation |  |
| 821-01-14 | | signal regulations |  |
| 821-01-15 | | main running line |  |
| 821-01-16 | | siding |  |
| 821-01-17 | | operation, <of points, of a device> |  |
| 821-01-18 | | ground frame operation |  |
| 821-01-19 | | permission |  |
| 821-01-20 | | authority for shunting |  |
| 821-01-21 | | overlap, <in signalling> |  |
| 821-01-22 | | route, <in signalling> |  |
| 821-01-23 | | fouling point |  |
| 821-01-24 | | reversible working |  |
| 821-01-25 | | temporary single-line working |  |
| 821-01-26 | | flank protection |  |
| 821-01-27 | | line subject to speed restriction |  |
| 821-01-28 | | control, <in signalling> |  |
| 821-01-29 | | central control of traffic |  |
| 821-01-30 | | direct control, <in signalling> |  |
| 821-01-31 | | remote control, <in signalling> |  |
| 821-01-32 | | local control, <in signalling> |  |
| 821-01-33 | | normal position |  |
| 821-01-34 | | reverse position |  |
| 821-01-35 | | resetting device |  |
| 821-01-36 | | prohibition device |  |
| 821-01-37 | | clearing of a track |  |
| 821-01-38 | | effect of train |  |
| 821-01-39 | | rigid transmission |  |
| 821-01-40 | | wire transmission |  |
| 821-01-41 | | broken-wire detector |  |
| 821-01-42 | | checking circuit |  |
| 821-01-43 | | checking equipment |  |
| 821-01-44 | | checking of an apparatus |  |
| 821-01-45 | | correspondence checking |  |
| 821-01-46 | | positional checking |  |
| 821-01-47 | | repeater, <in signalling> |  |
| 821-01-48 | | electromechanical repeater |  |
| 821-01-49 | | light repeater |  |
| 821-01-50 | | command, <in signalling> |  |
| 821-01-51 | | commercial speed |  |
| 821-01-52 | | degraded modes, pl |  |
| 821-01-53 | | environmental conditions, <for signalling equipment> pl |  |
| 821-01-54 | | equipment housing |  |
| 821-01-55 | | exclusive guideway |  |
| 821-01-56 | | generic application |  |
| 821-01-57 | | generic product |  |
| 821-01-58 | | grade of automation |  |
| 821-01-59 | | guideway clearance |  |
| 821-01-60 | | interchangeability, <of system components> |  |
| 821-01-61 | | interoperability of a transport network |  |
| 821-01-62 | | mission of a train |  |
| 821-01-63 | | movement authority |  |
| 821-01-64 | | operations control centre |  |
| 821-01-65 | | operations control HMI |  |
| 821-01-66 | | operations staff |  |
| 821-01-67 | | passenger transfer area |  |
| 821-01-68 | | passenger transfer door |  |
| 821-01-69 | | platform track |  |
| 821-01-70 | | platform waiting area |  |
| 821-01-71 | | safe places, pl |  |
| 821-01-72 | | safety space |  |
| 821-01-73 | | safety-related, adj |  |
| 821-01-74 | | specific application |  |
| 821-01-75 | | supervise, verb |  |
| 821-01-76 | | transfer area |  |
| 821-01-77 | | transport authority |  |
| 821-01-78 | | zero speed status |  |
| 821-01-79 | | zone of protection |  |
Section 821-02: Signals |  |
| 821-02-01 | | signal, <in railway signalling> |  |
| 821-02-02 | | aspect of a signal |  |
| 821-02-03 | | indication of a signal |  |
| 821-02-04 | | classification of signal aspects |  |
| 821-02-05 | | signal on |  |
| 821-02-06 | | open position, <of a signal> |  |
| 821-02-07 | | signal at danger |  |
| 821-02-08 | | clear signal |  |
| 821-02-09 | | out-of-commission signal |  |
| 821-02-10 | | masked signal |  |
| 821-02-11 | | signal out |  |
| 821-02-12 | | caution aspect |  |
| 821-02-13 | | manual signalling |  |
| 821-02-14 | | manually-operated signal |  |
| 821-02-15 | | mechanical signalling |  |
| 821-02-16 | | mechanical signal |  |
| 821-02-17 | | semaphore signal |  |
| 821-02-18 | | semaphore arm |  |
| 821-02-19 | | violet square signal |  |
| 821-02-20 | | disc signal |  |
| 821-02-21 | | signal circuit controller |  |
| 821-02-22 | | coupled signals, pl |  |
| 821-02-23 | | signal bracket |  |
| 821-02-24 | | bracketed signal |  |
| 821-02-25 | | signal gantry |  |
| 821-02-26 | | bell-code signalling |  |
| 821-02-27 | | detonator |  |
| 821-02-28 | | detonator placer |  |
| 821-02-29 | | electric signalling |  |
| 821-02-30 | | automatic signal |  |
| 821-02-31 | | semi-automatic signal |  |
| 821-02-32 | | automatic signal replacement |  |
| 821-02-33 | | light signalling |  |
| 821-02-34 | | light signal, <for signalling> |  |
| 821-02-35 | | multiple-aspect light signal |  |
| 821-02-36 | | position light signal |  |
| 821-02-37 | | marker light |  |
| 821-02-38 | | light unit |  |
| 821-02-39 | | single light unit |  |
| 821-02-40 | | multi-unit light signal |  |
| 821-02-41 | | signal light, <for signalling> |  |
| 821-02-42 | | flashing light signal |  |
| 821-02-43 | | phantom light |  |
| 821-02-44 | | searchlight signal |  |
| 821-02-45 | | hot strip |  |
| 821-02-46 | | side light |  |
| 821-02-47 | | signal lamp |  |
| 821-02-48 | | back light, <of a signal> |  |
| 821-02-49 | | approach lighting |  |
| 821-02-50 | | positioning of signals |  |
| 821-02-51 | | warning presignalling distance |  |
| 821-02-52 | | sighting distance |  |
| 821-02-53 | | distance between signals |  |
| 821-02-54 | | signal headway |  |
| 821-02-55 | | signal in rear |  |
| 821-02-56 | | signal identification plate |  |
| 821-02-57 | | signal type plate |  |
| 821-02-58 | | signal background |  |
| 821-02-59 | | signal hood |  |
| 821-02-60 | | signal not in use sign |  |
| 821-02-61 | | warning board |  |
| 821-02-62 | | execution signal |  |
| 821-02-63 | | warning signal, <for train driver> |  |
| 821-02-64 | | speed restriction warning signal |  |
| 821-02-65 | | speed restriction execution signal |  |
| 821-02-66 | | speed warning board |  |
| 821-02-67 | | speed limit execution board |  |
| 821-02-68 | | speed limit termination indicator |  |
| 821-02-69 | | line speed indicator |  |
| 821-02-70 | | route indicator |  |
| 821-02-71 | | distant route indicator |  |
| 821-02-72 | | direction indicating board |  |
| 821-02-73 | | fouling point indicator |  |
| 821-02-74 | | tail lamp |  |
| 821-02-75 | | reflectorized board |  |
| 821-02-76 | | stop-board |  |
| 821-02-77 | | vehicle on-line indicator |  |
| 821-02-78 | | whistle board |  |
| 821-02-79 | | stop signal, <for signalling> |  |
| 821-02-80 | | main signal |  |
| 821-02-81 | | entry signal |  |
| 821-02-82 | | exit signal |  |
| 821-02-83 | | departure signal |  |
| 821-02-84 | | departure light signal |  |
| 821-02-85 | | common signal |  |
| 821-02-86 | | main signal with shunting aspect |  |
| 821-02-87 | | special purpose subsidiary signal |  |
| 821-02-88 | | subsidiary signal |  |
| 821-02-89 | | supplementary signal indication |  |
| 821-02-90 | | block signal, <for signalling> |  |
| 821-02-91 | | permissive signal, <in a block system> |  |
| 821-02-92 | | stop and proceed signal |  |
| 821-02-93 | | call-on signal |  |
| 821-02-94 | | permissive light |  |
| 821-02-95 | | shunt signal |  |
| 821-02-96 | | shot shunting signal |  |
| 821-02-97 | | ground signal |  |
| 821-02-98 | | limit of shunt indicator |  |
| 821-02-99 | | humping signal |  |
| 821-02-100 | | distant signal |  |
| 821-02-101 | | outer distant signal |  |
| 821-02-102 | | pre-distant signal |  |
| 821-02-103 | | repeating signal |  |
| 821-02-104 | | short route signal |  |
| 821-02-105 | | speed regulating signal |  |
| 821-02-106 | | signal for work-site |  |
| 821-02-107 | | intermittent warning signal |  |
| 821-02-108 | | junction signal |  |
| 821-02-109 | | hand signal |  |
| 821-02-110 | | points indication signal |  |
| 821-02-111 | | brake test signal |  |
| 821-02-112 | | protection signal |  |
| 821-02-113 | | special protection signal |  |
| 821-02-114 | | wrong road signal |  |
| 821-02-115 | | driver's indication signal |  |
| 821-02-116 | | end of catenary signal |  |
| 821-02-117 | | lower pantograph advance warning sign |  |
| 821-02-118 | | lower pantograph execution sign |  |
| 821-02-119 | | lower pantograph cancellation sign |  |
| 821-02-120 | | switch-off-power warning sign |  |
| 821-02-121 | | switch-off-power execution signal |  |
| 821-02-122 | | switch-on-power indicator board |  |
| 821-02-123 | | signal fault |  |
| 821-02-124 | | whistle |  |
| 821-02-125 | | St. Andrew's cross |  |
| 821-02-126 | | warning signal, <for staff on the track> |  |
| 821-02-127 | | driving on sight |  |
Section 821-03: Train detection |  |
| 821-03-01 | | track circuit |  |
| 821-03-02 | | centre-fed track circuit |  |
| 821-03-03 | | double-rail track circuit |  |
| 821-03-04 | | single-rail track circuit |  |
| 821-03-05 | | jointless track circuit |  |
| 821-03-06 | | superimposible track circuit |  |
| 821-03-07 | | direct current track circuit |  |
| 821-03-08 | | alternating current track circuit |  |
| 821-03-09 | | capacitor fed alternating current track circuit |  |
| 821-03-10 | | inductance fed alternating current track circuit |  |
| 821-03-11 | | coded current track circuit |  |
| 821-03-12 | | high-voltage pulsed track circuit |  |
| 821-03-13 | | track relay |  |
| 821-03-14 | | insulated rail |  |
| 821-03-15 | | insulated section of track |  |
| 821-03-16 | | insulated joint |  |
| 821-03-17 | | insulating ferrule |  |
| 821-03-18 | | insulating fishplate |  |
| 821-03-19 | | end post |  |
| 821-03-20 | | insulating side-plate |  |
| 821-03-21 | | electric separation joint |  |
| 821-03-22 | | rail joint bond |  |
| 821-03-23 | | impedance bond |  |
| 821-03-24 | | resonant impedance bond |  |
| 821-03-25 | | track circuit compensating capacitors |  |
| 821-03-26 | | cut section of track circuit |  |
| 821-03-27 | | track circuit interrupter |  |
| 821-03-28 | | train shunt |  |
| 821-03-29 | | loss of shunt |  |
| 821-03-30 | | drop shunt of a track |  |
| 821-03-31 | | prevent shunt |  |
| 821-03-32 | | shunt resistance |  |
| 821-03-33 | | ballast resistance |  |
| 821-03-34 | | treadle |  |
| 821-03-35 | | magnetic treadle |  |
| 821-03-36 | | electromechanical treadle |  |
| 821-03-37 | | delayed action electromechanical treadle |  |
| 821-03-38 | | electronic treadle |  |
| 821-03-39 | | directional treadle |  |
| 821-03-40 | | loop detection equipment |  |
| 821-03-41 | | axle counter |  |
| 821-03-42 | | counting point |  |
| 821-03-43 | | end-of-train detector |  |
| 821-03-44 | | line clear detection |  |
| 821-03-45 | | track occupancy indicator |  |
| 821-03-46 | | certificate of acceptance |  |
| 821-03-47 | | compatibility case |  |
| 821-03-48 | | factor of safety |  |
| 821-03-49 | | gabarit |  |
| 821-03-50 | | spot transmission |  |
| 821-03-51 | | train detection |  |
| 821-03-52 | | train integrity |  |
| 821-03-53 | | wheel detector |  |
Section 821-04: Operation and detection of points and other rail-mounted equipment |  |
| 821-04-01 | | blade |  |
| 821-04-02 | | points, pl |  |
| 821-04-03 | | facing points |  |
| 821-04-04 | | trailing points |  |
| 821-04-05 | | arrival points |  |
| 821-04-06 | | shunting points |  |
| 821-04-07 | | trailable points |  |
| 821-04-08 | | non-resetting trailable points |  |
| 821-04-09 | | resetting trailable points |  |
| 821-04-10 | | intermediate points position |  |
| 821-04-11 | | trap points |  |
| 821-04-12 | | selective protective points |  |
| 821-04-13 | | catch points |  |
| 821-04-14 | | derailling points |  |
| 821-04-15 | | derailer |  |
| 821-04-16 | | point lock |  |
| 821-04-17 | | independent point lock |  |
| 821-04-18 | | dependent point lock |  |
| 821-04-19 | | slide-chair point lock and detector |  |
| 821-04-20 | | clamp lock |  |
| 821-04-21 | | securing bolt |  |
| 821-04-22 | | point machine |  |
| 821-04-23 | | point detector |  |
| 821-04-24 | | electric point detector |  |
Section 821-05: Interlocking and signal box equipment |  |
| 821-05-01 | | signal box |  |
| 821-05-02 | | interlocking, <in railway signalling> |  |
| 821-05-03 | | central signal box |  |
| 821-05-04 | | centralized traffic control |  |
| 821-05-05 | | satellite interlocking |  |
| 821-05-06 | | track circuit diagram |  |
| 821-05-07 | | control panel |  |
| 821-05-08 | | indication panel |  |
| 821-05-09 | | locking table |  |
| 821-05-10 | | entrance-exit control |  |
| 821-05-11 | | geographical control panel |  |
| 821-05-12 | | individual switch operation |  |
| 821-05-13 | | individual points control |  |
| 821-05-14 | | group button |  |
| 821-05-15 | | signalman |  |
| 821-05-16 | | traffic controller |  |
| 821-05-17 | | main route |  |
| 821-05-18 | | shunt route |  |
| 821-05-19 | | route setting system |  |
| 821-05-20 | | route section |  |
| 821-05-21 | | composite route |  |
| 821-05-22 | | partial route |  |
| 821-05-23 | | conflicting routes, pl |  |
| 821-05-24 | | emergency route |  |
| 821-05-25 | | route locking |  |
| 821-05-26 | | complete route locking |  |
| 821-05-27 | | sectional route releasing |  |
| 821-05-28 | | manual cancellation of route |  |
| 821-05-29 | | automatic route release |  |
| 821-05-30 | | automatic working of a route |  |
| 821-05-31 | | route-programme machine |  |
| 821-05-32 | | cancellation device |  |
| 821-05-33 | | emergency release |  |
| 821-05-34 | | emergency replacement switch |  |
| 821-05-35 | | approach locking |  |
| 821-05-36 | | approach locking section |  |
| 821-05-37 | | approach control |  |
| 821-05-38 | | approach section |  |
| 821-05-39 | | directional control |  |
| 821-05-40 | | non-presetting control |  |
| 821-05-41 | | presetting control |  |
| 821-05-42 | | point release button |  |
| 821-05-43 | | opposing locking |  |
| 821-05-44 | | sequential locking |  |
| 821-05-45 | | rotation locking |  |
| 821-05-46 | | continuity locking |  |
| 821-05-47 | | all relay interlocking |  |
| 821-05-48 | | computer controlled relay interlocking |  |
| 821-05-49 | | geographical circuit interlocking |  |
| 821-05-50 | | free wiring |  |
| 821-05-51 | | electric lock |  |
| 821-05-52 | | combined electric lock and circuit controller |  |
| 821-05-53 | | safety relay |  |
| 821-05-54 | | break contact |  |
| 821-05-55 | | make contact |  |
| 821-05-56 | | change-over contact |  |
| 821-05-57 | | reverse contact |  |
| 821-05-58 | | normal contact |  |
| 821-05-59 | | single-element relay |  |
| 821-05-60 | | two-element relay |  |
| 821-05-61 | | bistable relay |  |
| 821-05-62 | | three-position relay |  |
| 821-05-63 | | relay set |  |
| 821-05-64 | | repeater relay |  |
| 821-05-65 | | signal proving |  |
| 821-05-66 | | signal lamp proving |  |
| 821-05-67 | | signal light proving |  |
| 821-05-68 | | key lock |  |
| 821-05-69 | | key transmitter |  |
| 821-05-70 | | speed discriminator |  |
| 821-05-71 | | time release |  |
| 821-05-72 | | absolute detection |  |
| 821-05-73 | | continuous detection |  |
| 821-05-74 | | transient detection |  |
| 821-05-75 | | solid state interlocking |  |
| 821-05-76 | | redundancy, <in a system> |  |
| 821-05-77 | | redundancy management |  |
| 821-05-78 | | self testing |  |
| 821-05-79 | | divergence, <in a redundant sytem> |  |
| 821-05-80 | | right-side failure |  |
| 821-05-81 | | wrong-side failure |  |
| 821-05-82 | | availability, <of a product> |  |
| 821-05-83 | | repairable modular redundancy |  |
| 821-05-84 | | processor interlocking |  |
| 821-05-85 | | panel multiplexer |  |
| 821-05-86 | | technician's terminal |  |
| 821-05-87 | | data preparation |  |
| 821-05-88 | | safe data transmission |  |
| 821-05-89 | | data link, <in railway signalling> |  |
| 821-05-90 | | data link module, <in railway signalling> |  |
| 821-05-91 | | signal module |  |
| 821-05-92 | | points module |  |
| 821-05-93 | | train detection module |  |
| 821-05-94 | | integrated electronic control centre |  |
| 821-05-95 | | signalman's control and display system |  |
| 821-05-96 | | automatic route setting equipment |  |
| 821-05-97 | | timetable processor |  |
| 821-05-98 | | train describer |  |
| 821-05-99 | | identification entry |  |
| 821-05-100 | | progression system |  |
Section 821-06: Block signalling system |  |
| 821-06-01 | | block system |  |
| 821-06-02 | | block section |  |
| 821-06-03 | | absolute block |  |
| 821-06-04 | | permissive block |  |
| 821-06-05 | | absolute permissive block |  |
| 821-06-06 | | automatic block |  |
| 821-06-07 | | partly permissive automatic block |  |
| 821-06-08 | | manual block |  |
| 821-06-09 | | interlocking block |  |
| 821-06-10 | | telephone block |  |
| 821-06-11 | | fixed block |  |
| 821-06-12 | | moving block |  |
Section 821-07: Level crossing protection |  |
| 821-07-01 | | level crossing |  |
| 821-07-02 | | road warning device |  |
| 821-07-03 | | road barrier |  |
| 821-07-04 | | full barrier |  |
| 821-07-05 | | half-barrier |  |
| 821-07-06 | | half-barrier level crossing |  |
| 821-07-07 | | double half-barrier level crossing |  |
| 821-07-08 | | manually controlled level crossing |  |
| 821-07-09 | | automatic level crossing |  |
| 821-07-10 | | indication of an automatic level crossing |  |
| 821-07-11 | | cycle duration |  |
| 821-07-12 | | striking-in distance |  |
| 821-07-13 | | barrier machine |  |
| 821-07-14 | | automatic danger zone detector |  |
Section 821-08: Automatic train protection |  |
| 821-08-01 | | automatic train protection system |  |
| 821-08-02 | | automatic train control system |  |
| 821-08-03 | | train speed supervision |  |
| 821-08-04 | | cab signalling |  |
| 821-08-05 | | acknowledge button |  |
| 821-08-06 | | vigilance device |  |
| 821-08-07 | | automatic warning system |  |
| 821-08-08 | | automatic train stop |  |
| 821-08-09 | | automatic train stop override |  |
| 821-08-10 | | train stop |  |
| 821-08-11 | | braking speed supervision |  |
| 821-08-12 | | partial supervision |  |
| 821-08-13 | | locomotive magnet |  |
| 821-08-14 | | track magnet |  |
| 821-08-15 | | beacon, <in signalling> |  |
| 821-08-16 | | transponder, <in signalling> |  |
| 821-08-17 | | active beacon |  |
| 821-08-18 | | track conductor system |  |
| 821-08-19 | | continuous automatic train protection transmission system |  |
| 821-08-20 | | intermittent automatic train protection transmission system |  |
| 821-08-21 | | release at red signal, <in an intermittent automatic train protection transmission system> |  |
| 821-08-22 | | track-to-train transmission |  |
| 821-08-23 | | advance warning cab signalling |  |
| 821-08-24 | | service braking distance |  |
| 821-08-25 | | emergency braking distance |  |
| 821-08-26 | | target distance |  |
| 821-08-27 | | target speed |  |
| 821-08-28 | | infill information point, <in an intermittent automatic train protection transmission system> |  |
Section 821-09: Automatic train operation |  |
| 821-09-01 | | automatic train operation |  |
| 821-09-02 | | wheel revolution counter |  |
| 821-09-03 | | control location, <in an automatic train operation system> |  |
| 821-09-04 | | executive point, <in an automatic train operation system> |  |
| 821-09-05 | | train location, <in an automatic train operation system> |  |
| 821-09-06 | | zero point, <in an automatic train operation system> |  |
| 821-09-07 | | radio automatic train operation |  |
| 821-09-08 | | automated urban guided transport |  |
| 821-09-09 | | automatic mode |  |
| 821-09-10 | | driverless train operation |  |
| 821-09-11 | | non-automated train operation |  |
| 821-09-12 | | on-sight train operation |  |
| 821-09-13 | | semi-automated train operation |  |
| 821-09-14 | | unattended train operation |  |
Section 821-10: Miscellaneous |  |
| 821-10-01 | | hot box detector |  |
| 821-10-02 | | fall detector |  |
| 821-10-03 | | bridge displacement detector |  |
| 821-10-04 | | land-slide detector |  |
Section 821-11: Communication in transmission systems |  |
| 821-11-01 | | absolute time stamp |  |
| 821-11-02 | | access protection |  |
| 821-11-03 | | additional data, pl |  |
| 821-11-04 | | authentic message |  |
| 821-11-05 | | authenticity |  |
| 821-11-06 | | closed transmission system |  |
| 821-11-07 | | confidentiality |  |
| 821-11-08 | | corrupted message |  |
| 821-11-09 | | cryptographic technique |  |
| 821-11-10 | | cyclic redundancy check, <for communication in transmission systems> |  |
| 821-11-11 | | data, <for communication in transmission systems> pl |  |
| 821-11-12 | | implicit data, pl |  |
| 821-11-13 | | data corruption |  |
| 821-11-14 | | defence |  |
| 821-11-15 | | delayed message |  |
| 821-11-16 | | deleted message |  |
| 821-11-17 | | double time stamp |  |
| 821-11-18 | | error |  |
| 821-11-19 | | failure, <of an item> |  |
| 821-11-20 | | fault, <in a system> |  |
| 821-11-21 | | feedback message |  |
| 821-11-22 | | hacker |  |
| 821-11-23 | | hazard analysis |  |
| 821-11-24 | | information, <in a process> |  |
| 821-11-25 | | inserted message |  |
| 821-11-26 | | integrity, <of information> |  |
| 821-11-27 | | manipulation detection code |  |
| 821-11-28 | | masqueraded message |  |
| 821-11-29 | | message, <in transmission systems> |  |
| 821-11-30 | | message authentication code |  |
| 821-11-31 | | message enciphering |  |
| 821-11-32 | | message errors, pl |  |
| 821-11-33 | | message integrity |  |
| 821-11-34 | | message stream |  |
| 821-11-35 | | non-cryptographic safety code |  |
| 821-11-36 | | open transmission system |  |
| 821-11-37 | | port, <for signalling and telecommunications apparatus> |  |
| 821-11-38 | | random failure |  |
| 821-11-39 | | redundancy check |  |
| 821-11-40 | | redundant data, pl |  |
| 821-11-41 | | relative time stamp |  |
| 821-11-42 | | repeated message |  |
| 821-11-43 | | resequenced message |  |
| 821-11-44 | | safe fall-back state |  |
| 821-11-45 | | safety code |  |
| 821-11-46 | | safety integrity level |  |
| 821-11-47 | | safety reaction |  |
| 821-11-48 | | sequence number |  |
| 821-11-49 | | source and destination identifier |  |
| 821-11-50 | | systematic failure |  |
| 821-11-51 | | threat |  |
| 821-11-52 | | time stamp |  |
| 821-11-53 | | timeliness |  |
| 821-11-54 | | transmission code |  |
| 821-11-55 | | transmission system, <in communication, signalling and processing systems> |  |
| 821-11-56 | | unauthorized access |  |
| 821-11-57 | | user data, pl |  |
| 821-11-58 | | valid message |  |
| 821-11-59 | | validity |  |
Section 821-12: Reliabilty, availability, maintainability and safety |  |
| 821-12-01 | | accepting body |  |
| 821-12-02 | | accident |  |
| 821-12-03 | | apportionment |  |
| 821-12-04 | | assessment |  |
| 821-12-05 | | assessor |  |
| 821-12-06 | | authorization |  |
| 821-12-07 | | causal analysis |  |
| 821-12-08 | | COTS software |  |
| 821-12-09 | | commissioning |  |
| 821-12-10 | | common cause failures, pl |  |
| 821-12-11 | | compliance, <in signalling> |  |
| 821-12-12 | | configuration |  |
| 821-12-13 | | configuration management |  |
| 821-12-14 | | consequence analysis |  |
| 821-12-15 | | cross-acceptance |  |
| 821-12-16 | | design |  |
| 821-12-17 | | design authority |  |
| 821-12-18 | | designer |  |
| 821-12-19 | | diversity |  |
| 821-12-20 | | failure mode |  |
| 821-12-21 | | failure rate |  |
| 821-12-22 | | fault detection time |  |
| 821-12-23 | | fault tolerance, <in signalling> |  |
| 821-12-24 | | firmware, <in signalling> |  |
| 821-12-25 | | function, <of a product> |  |
| 821-12-26 | | generic software |  |
| 821-12-27 | | hazard log |  |
| 821-12-28 | | human error |  |
| 821-12-29 | | implementation |  |
| 821-12-30 | | implementer |  |
| 821-12-31 | | functional independence |  |
| 821-12-32 | | human independence |  |
| 821-12-33 | | physical independence |  |
| 821-12-34 | | individual risk |  |
| 821-12-35 | | logistic support |  |
| 821-12-36 | | mission |  |
| 821-12-37 | | mission profile |  |
| 821-12-38 | | negation |  |
| 821-12-39 | | negation time |  |
| 821-12-40 | | product, <in signalling> |  |
| 821-12-41 | | programmable logic controller |  |
| 821-12-42 | | railway authority |  |
| 821-12-43 | | railway infrastructure authority |  |
| 821-12-44 | | railway support industry |  |
| 821-12-45 | | random failure integrity |  |
| 821-12-46 | | random fault |  |
| 821-12-47 | | RAM programme |  |
| 821-12-48 | | rolling stock operator |  |
| 821-12-49 | | safe state |  |
| 821-12-50 | | safety acceptance |  |
| 821-12-51 | | safety approval |  |
| 821-12-52 | | safety authority |  |
| 821-12-53 | | safety case |  |
| 821-12-54 | | safety integrity |  |
| 821-12-55 | | safety life cycle |  |
| 821-12-56 | | safety management |  |
| 821-12-57 | | safety plan |  |
| 821-12-58 | | safety process |  |
| 821-12-59 | | safety regulatory authority |  |
| 821-12-60 | | safety-related software |  |
| 821-12-61 | | software |  |
| 821-12-62 | | software maintainability |  |
| 821-12-63 | | software maintenance |  |
| 821-12-64 | | software safety integrity level |  |
| 821-12-65 | | stress profile |  |
| 821-12-66 | | system life cycle |  |
| 821-12-67 | | system safety integrity level |  |
| 821-12-68 | | systematic failure integrity |  |
| 821-12-69 | | systematic fault, <in signalling> |  |
| 821-12-70 | | technical safety report |  |
| 821-12-71 | | tolerable risk |  |
| 821-12-72 | | validation |  |
| 821-12-73 | | validator |  |
| 821-12-74 | | verification |  |
| 821-12-75 | | verifier |  |
|  |