Оглавление

Введение                                                                                                                 1

Основная часть

1.      Общие сведения об ISDN                                                                               4

1.1.  История                                                                                                            4

1.2.  Библиографическая справка                                                                          5

1.3.  Области применения и услуги                                                                                  6

1.4.  Преимущества ISDN                                                                                      10

1.5.  Концепция ISDN                                                                                            11

2.      Описание технологии                                                                                     12

2.1.  Интерфейсы ISDN: BRI и PRI                                                                                  12

2.2.  Уровни обмена сигналами                                                                            

2.2.1.      Уровень 1                                                                                                    15

2.2.2.      Уровень 2                                                                                                    16

2.2.3.      Уровень 3                                                                                                    16

3.      Средства связи подключения к ISDN                                                                       18

3.1.  Компоненты ISDN                                                                                         18

3.1.1.      Терминальное оборудование                                                                    19

3.1.2.      Терминальные адаптеры                                                                           20

3.2.  Средства доступа                                                                                            21

3.3.  Устройства для передачи данных                                                                 22

4.      Передача данных с помощью технологии ADSL                                        24

4.1.  Что такое ADSL?                                                                                            25

4.2.  Принципы организации услуги ADSL                                                                    27

4.3.  Universal ADSL                                                                                               30

5.      Что лучше ISDN или ADSL?                                                                          30

Список литературы                                                                                               34