| 摘要 |
PCT No. PCT/SE83/00451 Sec. 371 Date Jun. 29, 1984 Sec. 102(e) Date Jun. 29, 1984 PCT Filed Dec. 14, 1983 PCT Pub. No. WO84/02816 PCT Pub. Date Jul. 19, 1984.A method and apparatus in a telecommunication system for activating from idling state to active state. This system includes a digital transmission link consisting of a subscriber side containing a subscriber terminal (NT) and a station side containing a line terminal (LT) assigned to the station, the line terminal being connected to a clock pulse oscillator (CLM) constituting the master clock for the system, and the network terminal being connected to a local clock pulse oscillator (CLS) constituting a slave clock. Activation may take place either from the subscriber side or from the station side. In activation from the subscriber side an activation request signal (AR) is sent from a subscriber to the network terminal (NT) from which a cyclic bit pattern is sent to the line terminal (LT). The bit pattern is detected and sent as an activation request to the station which sends an activation order (AO) back to the line terminal. The line terminal sends frame formatted data and synchronizing signals back to the network terminal which then sends activation order to the subscriber and acknowledgement signals to the station. In activation from the station side, the activation order goes directly from the station without a preceding activation request from the subscriber. |
