In addition to the above joint circuit and wiring diagrams are given the
basic and wiring codes, e.g. RP/RPW
Prefix
Code |
Description |
Remarks |
1 to 500 399 |
Fully dimensioned drawings of apps and equip approved for production |
|
AD |
Air Defence drawings and diagrams |
|
ADA |
Air Defence drawings and diagrams |
|
ADF |
Air Defence drawings and diagrams |
|
ADK |
Air Defence drawings and diagrams |
|
ADL |
Air Defence drawings and diagrams of cable networks |
was ROC |
ADP |
Air Defence diagrams |
|
ADU |
Air Defence diagrams |
|
ADW |
Air Defence diagrams |
|
ADX |
Air Defence diagrams |
|
AGS |
UAX No. 7 diagrams |
|
AS |
Area of search plans for Repeater stations |
|
AT |
Auto exchange ccts; wholly or partially electronic; trunk toll; misc
ccts |
|
AT/ATW |
Auto exchange ccts; wholly or partially electronic; trunk toll; misc
ccts |
|
ATM |
Auto exchange ccts; wholly or partially electronic; trunk toll; misc
ccts |
|
ATU |
Auto exchange ccts; wholly or partially electronic; trunk toll; misc
ccts |
|
ATW |
Auto exchange ccts; wholly or partially electronic; trunk toll; misc
ccts |
|
ATX |
Auto exchange ccts; wholly or partially electronic; trunk toll; misc
ccts |
|
AU |
Auto exchange ccts; wholly or partially electronic; trunk toll; misc
ccts |
|
BB |
Broadband utilization |
|
BM |
Cable and network diagrams |
|
C |
Cable and network diagrams that are security classified |
|
CB |
CB exchange ccts |
|
CBU |
CB exchange ccts |
|
CBW |
CB exchange ccts |
|
CBX |
CB exchange ccts |
|
CU |
CB exchange ccts |
|
CBS |
CBS exchange ccts |
|
CBSU |
CBS exchange ccts |
|
CBSW |
CBS exchange ccts |
|
CBSX |
CBS exchange ccts |
|
CBU |
CBS exchange ccts |
|
CBW |
CBS exchange ccts |
|
CBX |
CBS exchange ccts |
|
CC |
Communication charts |
Regional |
CCS(L) |
Cable cross section diagrams |
|
CD |
Contour drawings insufficiently dimensioned for inclusion in main series |
|
CN |
External plant and protection |
|
CSU |
CBS exchange ccts |
|
CTS |
Drawings, diagrams etc for training branch |
|
CU |
|
|
CV |
Valve characteristic curves |
|
CX |
|
|
D |
Boundary maps, key plans and
cable network diagrams covering the whole country |
DL |
Drawing lists for selected jobs |
|
DR |
Drilling for apparatus |
|
DT |
Data transmission and associated equipment |
|
DTN |
Telegraph defence ccts and accommodation plans |
|
DTW |
Data transmission and associated equipment |
|
DT/DTW |
Data transmission and associated equipment |
|
DWL |
Data transmission and associated equipment |
|
E |
Diagrams of non-STD transmission equipment and early equipment |
|
EC |
Installation particulars of equipment |
|
ECW |
Installation particulars of equipment |
|
ED |
Drawings of Transmission equipment |
|
EDA |
Drawings of Transmission equipment |
|
EG |
Drawings and diagrams for electronic exchanges |
|
EGA |
Drawings for electronic exchanges |
|
EGC |
Diagrams developed under the auspices of the JERC |
|
EGF |
Diagrams developed under the auspices of the JERC |
|
EGN |
Diagrams developed under the auspices of the JERC |
|
EGU |
Diagrams developed under the auspices of the JERC |
|
EGX |
Diagrams developed under the auspices of the JERC |
|
EQ |
Semi-auto equipment fire emergency ccts |
|
ER |
Semi-auto equipment fire emergency ccts |
|
ES |
Accommodation and equipment layout plans of buildings |
was EX SK series |
ETC |
Drawings, diagrams etc for training branch |
was CTS series |
ETE |
Drawings and diagrams of Radio stations, Tele Exchs & Telegraph
layouts |
|
EW |
Non-standard transmission equipment |
|
E/EW |
Non-standard transmission equipment |
|
EX |
Drawings and diagrams for all divisions in research branch, except R12 |
|
EX/SK |
Superseded by ES series |
|
F |
Main cable development forecast diagrams |
|
FA |
Fire alarm ccts |
|
FA(L) |
Fire alarm ccts |
|
FAW |
Fire alarm ccts |
|
FDA |
Drawings for factory divisions |
|
FDH |
Drawings for factory divisions |
|
FY |
Drawings for factory divisions |
|
GMT |
Clocks and Greenwich mean time cct |
|
GMTW |
Clocks and Greenwich mean time cct |
|
HF |
HF diagrams |
|
IF |
Factory diagrams |
|
LA |
Circuit lab diagrams |
|
LD |
Label diagrams for pasting into instruments |
|
LFS |
Factory drawings |
|
LL |
Drawings of local line network |
|
LR |
Misc drawings and diagrams |
|
MISC |
|
|
MOH |
Drawings of items provided for the department of health |
|
MS |
Experimental and temporary ccts |
|
MSU |
Experimental and temporary ccts |
|
MSW |
Experimental and temporary ccts |
|
MSX |
Experimental and temporary ccts |
|
MT |
Vehicles and associated equipment |
|
MTF |
Methods for fitting items on vehicles for M Branch |
|
MU |
Main underground HF and carrier cables, land end and sea earth cables |
|
MU-FM |
Main underground HF and carrier cables, land end and sea earth cables |
|
MU-TT |
Test tablet diagrams. Suffix
TT added to associated MU number |
|
MU4000(HF) |
Main network diagrams, motorway cables layout diagrams |
|
MW |
Main network diagrams, motorway cables layout diagrams |
|
N |
Telephone, Call offices and pbx ccts |
loose leaf |
ND |
Network diagrams of private ccts |
|
NT/NTA |
Ex National Telephone Company |
|
PA |
Police alarm ccts |
|
PA(L) |
Police alarm ccts |
|
PF |
Phonogram and tele/telegraph ccts and installations |
|
PFU |
Phonogram and tele/telegraph ccts and installations |
|
PFW |
Phonogram and tele/telegraph ccts and installations |
|
PFX |
Phonogram and tele/telegraph ccts and installations |
|
PLAN |
Miscellaneous diagrams, maps, networks and proposals |
|
P/DC |
Telecoms power plant ccts |
|
P/DCW |
Telecoms power plant ccts |
|
P/EL |
Electric light fittings |
|
P/ELD |
Illumination intensity |
|
P/HG |
Heating layouts. Boiler
room and fuel hopper arrangements |
|
P/LG |
|
|
P/MSC |
Miscellaneous |
|
P/P |
Engine room, switch gear wiring diagrams |
|
P/PN |
Pneumatic diagrams |
|
P/TC |
Power plant drawings |
|
P/VN |
Ventilation layouts |
|
Q |
House exchange telephone systems |
loose leaf |
Q(L) |
House exchange telephone systems |
loose leaf |
R |
Master
copies of tracings from blanks, illustrations for books etc |
|
RA |
Relay adjustment cards |
|
RES |
Drawings and diagrams for all divisions in research branch |
|
RP |
Repeater and amplifier equipment and ccts |
|
RPA |
Repeater and amplifier equipment and ccts |
|
RPW |
Repeater and amplifier equipment and ccts |
|
RPX |
Repeater and amplifier equipment and ccts |
|
ROC |
NOW ADL |
|
RSF |
Repeater station distribution frame layouts |
|
RSS |
Repeater station distribution frame layouts |
|
RT |
Automatic exchange routiner ccts |
|
RTM |
Automatic exchange routiner ccts |
|
RTU |
Automatic exchange routiner ccts |
|
RTW |
Automatic exchange routiner ccts |
|
RTX |
Automatic exchange routiner ccts |
|
RW |
Automatic exchange routiner ccts |
|
S |
Parts and composite parts of common use |
|
SA |
Circuits of telephone subscribers apparatus |
|
SA(L) |
Circuits of telephone subscribers apparatus |
|
SA/SAW |
Circuits of telephone subscribers apparatus |
|
SAJ |
Circuits of telephone subscribers apparatus |
|
SAW |
Circuits of telephone subscribers apparatus |
|
SAX |
Circuits of telephone subscribers apparatus |
|
SC |
Scales for electrical measuring instruments |
Previously on CD |
SD |
Standard data |
|
SHEET |
|
|
SUB/A |
Woolwich data drawings |
|
SUB/B |
Dover data drawings |
|
SUB/C |
Dalmuir data drawings |
|
SUB/D |
CS Ariel drawings |
|
SUB/E |
CS Iris drawings |
|
SUB/F |
CS Alert drawings |
|
SUB/G |
CS Sentinel drawings |
|
SUB/H |
Southampton CMD drawings |
|
SUG/J |
Misc Nautical drawings |
|
SUB/K |
Foreign charts |
|
SUB/L |
Contracts charts |
|
SUB/LS |
Misc equipment affecting all ships |
|
SUB/M |
Beacons at shore ends |
|
SUB/N |
Methil cable depot |
|
SUB/P |
CS Monarch drawings for cable ship equipt for PO use use designed
externally |
|
SUB/Q |
CS Monarch drawings for cable ship equipt for PO use use designed
externally |
|
SUB/R |
Cable section sheets |
|
SUB/S |
PO designed equipment |
|
SUB/T |
Cable shore ends |
|
SUB/U |
Common equipment for new ships |
|
SUB/V |
|
|
SUB/W |
CS Iris |
|
SUB/X |
Greek consultancy |
|
SUB/Z |
Sketches, schedules, graphs etc |
|
SUP/D |
Packaging |
|
T |
Testing circuits and diagrams |
|
TG |
Telegraph ccts - theoretical |
|
TG(L) |
Telegraph ccts |
loose leaf |
TGM |
Telegraph ccts |
|
TGK |
Telegraph ccts |
|
TGU |
Telegraph ccts |
|
TGW |
Telegraph ccts - wiring |
|
TGX |
Telegraph ccts |
|
TK |
Auto exchange trunking and grading diagrams |
|
TL |
Telephone, trunk, misc and power |
|
TLU |
Telephone, trunk, misc and power |
|
TLW |
Telephone, trunk, misc and power |
|
TLX |
Telephone, trunk, misc and power |
|
TP |
Telephone exchange equipment installation drawings and diagrams |
|
TPW |
Telephone exchange equipment installation drawings and diagrams |
|
TPX |
Cross connection field for meter pulse supplies |
|
TRT |
Testers for telephone exchange equipment |
|
TRTM |
Testers for telephone exchange equipment |
|
TSB |
Diagrams for test equipment |
|
TSL |
Diagrams for test equipment (test section Studd Street) |
|
TSU |
Drawings and diagrams for the Technical support unit |
|
TTC |
Training branch material |
|
TU |
|
|
WB |
Laboratory drawings and diagrams |
|
WB/WBM |
Laboratory drawings and diagrams |
|
WBM |
Laboratory drawings and diagrams (assembly) |
|
WBW |
Laboratory drawings and diagrams |
|
WE |
War emergency diagrams (1939) |
|
WL |
Radio station drawings and maps |
|
WM |
Radio station drawings and maps |
|
XED |
Drawings and diagrams of non-standard equipment for experimental
purposes |
|
XM |
ATE crossbar exchanges 5005 |
|
XP |
ATE crossbar exchanges 5005 |
|
XQ |
ATE crossbar exchanges 5005 |
|
XS |
ATE crossbar exchanges 5005 |
|
XX |
ATE crossbar exchanges 5005 |
|
Y |
Diagrams and drawings for R12 |
|
Z |
Drawings and diagrams for RS division before transfer to GCHQ |
|