| V[Y |
©ΰe |
| Series A |
Organization of the work of the ITU-T |
| Series B |
Means of expression |
| Series C |
General telecommunication statistics |
| Series D |
General tariff principles |
| Series E |
Telephone network and ISDN |
| Series F |
Non-telephone telecommunication services |
| Series G |
Transmission systems and media |
| Series H |
Transmission of non-telephone signals |
| Series I |
Integrated services digital network (ISDN) |
| Series J |
Transmission of sound-programme and television signals |
| Series K |
Protection against interference |
| Series L |
Construction, installation and protection of cables and other elements
of outside plant |
| Series M |
Maintenance: international transmission systems, telephone circuits, telegraphy,
facsimile and leased circuits |
| Series N |
Maintenance: international sound-programme and television transmission
circuits |
| Series O |
Specifications of measuring equipment |
| Series P |
Telephone transmission quality |
| Series Q |
Switching and signalling |
| Series R |
Telegraph transmission |
| Series S |
Telegraph services terminal equipment |
| Series T |
Terminal equipments and protocols for telematic services |
| Series U |
Telegraph switching |
| Series V |
Data communication over the telephone network |
| Series X |
Data networks and open system communication |
| Series Z |
Programming languages |
ITU-T©V[Y 