| 摘要 |
The system responds to a request from customer equipment, to download protocol software from a network management control centre to the customer equipment. An interface is arranged between a telecommunication operator and a customer equipment through a synchronous, digital, hierarchic addition/drop multiplexer unit. The system also responds to a request from a customer equipment, to download protocol software from a network management control centre to the synchronous, digital, hierarchy add-drop multiplexer unit. |
