Activation of a transmission link by code sending

Claim 3

Apparatus in a telecommunication system for activating means from an idling state to active state, there being included in the system a digital transmission link consisting of a subscriber side including a network terminal (NT) assigned to the subscriber, and a station side including a line terminal (LT) assigned to the station, said line terminal being connected to a clock pulse oscillator constituting the master clock for the system, and said network terminal being connected to a local clock pulse oscillator constituting a slave clock, characterized in that; in activation from the network terminal (NT) a first send control means (S1), on reception of an activation request signal (AR) from a subscriber, activates a code transmitter (KS1) for sending said activation request in the form of a continuously sent, cyclic bit pattern through a first data switch (DS1), a first through connection circuit (FF3), a first adaptive hybrid circuit (AG1) and a transmission line (L) to a line terminal (LT) including a second adaptive hybrid circuit (AG2); a first code receiver (CD1) for detecting said activation request (AR) and for sending it towards a station (CPU), said station sending an activation order signal (AO) in response to said activation request; a second send control means (S2) for receiving said activation order and for activating a second data switch (DS2) for through connection of data in frame format and synchronizing information sent from a frame code generator (RG2) under the control of a central clock pulse oscillator (CLM) back to the network terminal (NT), in which said local clock pulse oscillator (CLS) is synchronized to the rate from the master clock (CLM) from the received data flow; and that on detection of frame format and frame synchronism a first frame detector (RD1) sends an activation order (AO) to the subscriber and control signals to said first send control means (S1), the output signal of which activates said first data switch (DS1) to change position, and for through connection of data in frame format from a further frame code generator (RG1) back to the line terminal (LT), in which a second frame detector (RD2) detects the received information and for discovered frame format and frame synchronism sends acknowledgement signals RS) to the station; and in station-initiated activation an activation order (AO) is sent from the station to said second send control means (S2), the output signal of which activates a second through connection circuit (FF5) for through connection and sending of a continuous signal containing a cyclically repeated bit pattern from a second code transmitter (KS2) back to the network terminal (NT), in which a second code detector (CD2) sends a control signal, after detection of said bit pattern, to said first send control means (S1), the output signal of which activates said first through connection circuit (FF3) for through connection of a continuously sent cyclic bit pattern from said first code transmitter (KS1) to the line terminal (LT), in which said first code receiver (CD1) sends a control signal, after detection of the received signal, to said second send control means (S2), the output signal of which activates said second data switch (DS2) such as to assume its state for through connection of frame-formatted data and synchronizing information sent from said frame code generator (RG2) back to said network terminal (NT); the local clock pulse oscillator (CLS) in the network terminal being synchronized with the rate from the master clock (CLM) from the received data flow, and after detecting frame format and synchronizing information said first frame detector (RD1) sends an activation order (AO) to the subscriber, and activates said first send control means (S1), the output signal of which activates said first data switch (DS1) for changing state and for through connection of frame-formatted data sent from said further frame code generator (RG1) back to the line terminal (LT), in which said second frame detector (RD2) detects the received information and sends said acknowledgement signals (RS) to the station for discovered frame format and frame synchronism.

Claim 4

Apparatus in a telecommunication system for activating means from an idling state to active state, there being included in the system a digital transmission link consisting of a subscriber side including a network terminal (NT) assigned to the subscriber, and a station side including a line terminal (LT) assigned to the station, said line terminal being connected to a clock pulse oscillator constituting the master clock for the system, and said network terminal being connected to a local clock pulse oscillator constituting a slave clock, characterized in that; in activation from the network terminal (NT) a first send control means (S1), on reception of an activation request signal (AR) from a subscriber, activates a code transmitter (KS1) for sending said activation request in the form of a continuously sent, cyclic bit pattern through a first data switch (DS1), a first through connection circuit (FF3), a first adaptive hybrid circuit (AG1) and a transmission line (L) to a line terminal (LT) including a second adaptive hybrid circuit (AG2); a first code receiver (CD1) for detecting said activation request (AR) and for sending it towards a station (CPU), said station sending an activation order signal (AO) in response to said activation request; a second send control means (S2) for receiving said activation order and for activating a second data switch (DS2) for through connection of data in frame format and synchronizing information sent from a frame code generator (RG2) under the control of a central clock pulse oscillator (CLM) back to the network terminal (NT), in which said local clock pulse oscillator (CLS) is synchronized to the rate from the master clock (CLM) from the received data flow; and that on detection of frame format and frame synchronism a first frame detector (RD1) sends an activation order (AO) to the subscriber and control signals to said first send control means (S1), the output signal of which activates said first data switch (DS1) to change position, and for through connection of data in frame format from a further frame code generator (RG1) back to the line terminal (LT), in which a second frame detector (RD2) detects the received information and for discovered frame format and frame synchronism sends acknowledgement signals RS) to the station; and in station-initiated activation an activation order (AO) is sent from the station to said second send control means (S2), the output signal of which activates a second through connection circuit (FF5) for through connection and sending of a continuous signal containing a cyclically repeated bit pattern from a second code transmitter (KS2) back to the network terminal (NT), in which a second code detector (CD2) sends a control signal, after detection of said bit pattern, to said first send control means (S1), the output signal of which activates said first through connection circuit (FF3) for through connection of a continuously sent cyclic bit pattern from said first code transmitter (KS1) to the line terminal (LT), in which said first code receiver (CD1) sends a control signal, after detection of the received signal, to said second send control means (S2), the output signal of which activates said second data switch (DS2) such as to assume its state for through connection of frame-formatted data and synchronizing information sent from said frame code generator (RG2) back to said network terminal (NT); the local clock pulse oscillator (CLS) in the network terminal being synchronized with the rate from the master clock (CLM) from the received data flow, and after detecting frame format and synchronizing information said first frame detector (RD1) sends an activation order (AO) to the subscriber, and activates said first send control means (S1), the output signal of which activates said first data switch (DS1) for changing state and for through connection of frame-formatted data sent from said further frame code generator (RG1) back to the line terminal (LT), in which said second frame detector (RD2) detects the received information and sends said acknowledgement signals (RS) to the station for discovered frame format and frame synchronism.