1. Recommendation G.701. Vocabulary of digital transmission and multiplexing, and pulse code modulation (PCM) terms. ITU-T.
2. Recommendation G.702. (11/88) Digital hierarchy bit rates. Blue Book. ITU-T.
3. Recommendation G.703. Phisical/Electrical Characteristics of Hierarchical Digital Interfaces. ITU-T.
4. Recommendation G.704. Synchronous frame structures used at 1544, 6312, 2048, 8488 and 44736 kbit/s. ITU-T.
5. Recommendation G.706. Frame alignment and cyclic redundancy check (CRC) procedures relating to basic frame structures defined in Recommendation G.704. ITU-T.
6. Recommendation G.707. Network node interface for the synchronous digital hierarchy. ITU-T.
7. Recommendation G.711. Pulse code modulation (PCM) of voice frequencies. ITU-T.
8. Recommendation G.732. Characteristics of primary PCM multiplex equipment operating at 2048 kbit/s. ITU-T.
9. Recommendation G.742. Second order digital multiplex equipment operating at 8448 kbit/s and using positive justification. ITU-T.
10. Recommendation G.751. Digital multiplex equipments operating at the third order bit rate of 34368 kbit/s and the fourth order bit rate of 139264 kbit/s and using positive justification. ITU-T.
11. Recommendation G.772. Protected monitoring points provided on digital transmission systems. ITU-T.
12. Recommendation G.775. Loss of signal (LOS) and alarm indication signal (AIS) defect detection and clerance criteria. ITU-T.
13. Recommendation G.783. Characteristics of SDH equipment functional blocks. ITU-T.
14. Recommendation G.784. SDH management. ITU-T.
15. Recommendation G.803. Architectures of transport networks based on the SDH. ITU-T.
16. Recommendation G.804. ATM cell mapping into plesiochronous digital hierarchy (PDH). ITU-T.
17. Recommendation G.810. Considerations on timing and synchronization issues. ITU-T.
18. Recommendation G.811. Timing requirements at the outputs of primary reference clocks suitable for plesichronous operation of international digital links. ITU-T.
19. Recommendation G.812. Timing requirements at the outputs of slave clocks suitable for plesiochronous operation of international digital links. ITU-T.
20. Recommendation G.813. Timing characteristics of SECs. ITU-T.
21. Recommendation G.821. Error performance of an international digital connection forming part of an integrated services digital network. ITU-T.
22. Recommendation G.822. Controlled slip rate objectives on an international digital connection
23. Recommendation G.823. The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy. ITU-T.
24. Recommendation G.825. The control of jitter and wander within digital networks which are based on the SDH. ITU-T.
25. Recommendation G.826. Error performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate. ITU-T.
26. Recommendation G.831. Management capabilities of transport networks based on the SDH. ITU-T.
27. Recommendation G.832. Transport of SDH elements on PDH networks - Frame and multiplexing structures. ITU-T.
28. Recommendation G.921. Digital sections based on the 2048 kbit/s hierarchy. ITU-T.
29. Recommendation G.952. Digital line systems based on the 2048 kbit/s hierarchy on symmetric pair cables. ITU-T.
30. Recommendation G.954. Digital line systems based on the 2048 kbit/s hierarchy on coaxial pair cables. ITU-T.
31. Recommendation G.955. Digital line systems based on the 1544 kbit/s and the 2048 kbit/s hierarchy on optical fibre cables. ITU-T.
32. Recommendation G.957. Optical interfaces for equipments and systems relating to the SDH. ITU-T.
33. Recommendation G.958. Digital line systems based on the SDH for use on optical fibre cables. ITU-T.
34. Recommendation I.311. B-ISDN general network aspects. ITU-T.
35. Recommendation I.356. B-ISDN-ATM layer cell transfer performance. ITU-T.
36. Recommendation I.361. B-ISDN-ATM layer specification. ITU-T.
37. Recommendation I.363. B-ISDN-ATM adaptation layer (AAL) specification. ITU-T.
38. Recommendation I.371. Traffic control and congestion control in B-ISDN. ITU-T.
39. Recommendation I.413. B-ISDN user-network interface. ITU-T.
40. Recommendation I.432. B-ISDN user-network interface - PMD layer specification. ITU-T.
41. Recommendation I.610. B-ISDN operation and maintenance principles and functions. ITU-T.
42. Recommendation M.2100. Performance limits for bringing-into-service and maintenance of international PDH paths, sections and transmission systems. ITU-T.
43. Recommendation M.2110. Bringing into service international digital paths, sections and transmission systems. ITU-T.
44. Recommendation M.2120. Digital path, section and transmission system fault detection and localization procedures. ITU-T.
45. Recommendation О.151. Error performance measuring equipment operating at the primary rate and above. ITU-T.
46. Recommendation О.152. Error performance measuring equipment for bit rates of 64 kbit/s and N x 64 kbit/s. ITU-T.
47. Recommendation О.171. Timing jitter measuring equipment for digital systems. ITU-T.
48. ETS 300 010-1. Transmission and Multiplexing (TM); Synchronous cross connect equipment 64 and n x 64 kbit/s cross connection rate 2048 kbit/s access ports; Part 1: Core functions and characteristics.
49. ETS 300 010-2. Transmission and Multiplexing (TM); Synchronous cross connect equipment 64 and n x 64 kbit/s cross connection rate 2048 kbit/s access ports; Part 2: Management aspects.
50. ETS 300 417-1. General functional requirements for SDH transmission equipment - Generic processes and performance.
51. ETS 300 417-2. Physical section layer functions.
52. ETS 300 417-3. STM-N regenerator and multiplex section layer functions.
53. ETS 300 417-4. SDH path layer functions ETS 300 417-5 PDH path layer functions.
54. ETS 300 417-6. Synchronization distribution function.
55. ETS 300 462-1. General requirements for synchronization networks. Definitions and terminology for synchronization networks.
56. ETS 300 462-2. Synchronization network architecture.
57. ETS 300 462-3. The control of jitter and wander within synchronization networks.
58. ETS 300 462-4. Timing characteristics of slave clocks suitable for synchronization supply to SDH and PDH equipment.
59. ETS 300 462-5. Timing characteristics of slave clocks suitable for operation in SDH equipment.
60. ETS 300 462-6. Timing characteristics of PRCs.

АТС Автоматическая телефонная станция
ВОСП Волоконно-оптическая система передачи
ИКМ Импульсно-кодовая модуляция
ИКМ-30 Сокращение, используемое для обозначения потока Е1 с цикловой и сверхцикловой структурой
ИКМ-31 Сокращение, используемое для обозначения потока Е1 с цикловой структурой
ЛАЦ Линейно-аппаратный цех (иногда применяется ЛАЗ - линейно-аппаратный зал)
МВВ Мультиплексор ввода/вывода
МККТТ Международный комитет по телефонии и телеграфии
МСЭ Международный союз электросвязи
МСЭ-Т Международный комитет по телефонии и телеграфии (новое название)
ОКС 7 Система сигнализации по ОКС №7
ОЦК Общий цифровой канал (канал 64 кбит/с)
ПД Передача данных
ПО Программное обеспечение
ПСП Псевдослучайная двоичная последовательность
рек. Рекомендация
РРЛ Радиорелейная линия связи
ССС Спутниковая система связи
ТЧ Канал тональной частоты
УПАТС Учрежденческая производственная АТС