Data base creation in stored program controlled switching systems

In an arrangement comprising a first and a second switching network, each switching network being associated with a first and a second controller, respectively, said switching networks comprising arrangements for selectively connecting a plurality of input ports to a plurality of output ports, a method comprising

• establishing and maintaining connections between said input and said output ports through said first switching network operating under the control of said first controller;
• inhibiting the establishment of connections between said input and said output ports through said first switching network;
• reading hardware controlling data from said first switching network by said second controller
• generating from said hardware controlling data a data structure in a format acceptable to said second controller;
• storing said data structure in said second controller;
• and
• establishing and maintaining connections between said input and said output ports through said second switching network by said second controller operating in accordance with the data structure stored in said storing step.

In a time division switching system comprising a first time-slot interchange unit for receiving data words in a plurality of first channels and transmitting data words in selected ones of a plurality of second channels in accordance with control information stored in a first control memory;

• a second time-slot interchange unit for receiving data words in a plurality of third channels and transmitting data words so received in selected ones of a plurality of fourth channels in accordance with control information stored in a second control memory wherein each first channel is associated with one of said fourth channels and each second channel is associated with one of said third channels;
• a first controller for establishing and maintaining connections through said first and said second time-slot interchange units by modifying the contents of said first and said second control memories;
• and a second controller, a method comprising the following steps:
• inhibiting said first controller from modifying the contents of said first and said second control memories;
• reading the control information stored in said first and said second control memories by said second controller;
• generating from said control information a data structure in a format acceptable to said second controller;
• storing said data structure in said second controller;
• and
• establishing and maintaining connections through said first and said second time-slot interchange unit by said second controller operating in accordance with the data structure stored in said storing step.

ln a time divison switching system comprising a plurality of subscriber sets for transmitting and receiving subscriber signals;

• a first and second time multiplex line each having a plurality of time-separated channels;
• a connection arrangement operative under the control of control information stored in a first control memory arrangement, for transmitting subscriber signal representations from selected ones of said subscriber sets to selected ones of said first time-multiplexed line channels and for transmitting subscriber signal representations from selected ones of said second time-multiplexed line channels to selected ones of said subscriber sets;
• a receive time-slot interchange unit connected to said first time-multiplexed line for transmitting signal representations in the channels of said first multiplex line to channels of a third time-multiplexed line as defined by control information stored in a second control memory arrangement;
• a transmit time-slot interchange unit connected to said second time-multiplexed line for transmitting signal representations received on a fourth time-multiplexed line to selected channels of said second time-multiplexed line as defined by control information stored in a third control memory arrangement, wherein each channel on said first time-multiplexed line is associated with a channel on said second time-multiplexed line and each channel on said third time-multiplexed line is associated with a channel on said fourth time-multiplexed line;
• a first controller for establishing and maintaining connections through said connection arrangement, said receive time-slot interchange unit and said transmit time-slot interchange unit by modifying the content of said first, said second, and said third control memory arrangement;
• and a second controller, the method comprising the following steps:
• inhibiting said first controller from modifying the contents of said first, said second, and said third control memory arrangements;
• reading the control information stored in said first, said second, and said third control memory arrangements by said second controller;
• generating from said control information a data structure in a format acceptable to said second controller;
• storing said data structure in said second controller;
• and
• establishing and maintaining connections through said receive time-slot interchange, said transmit time-slot interchange, and said connection arrangement by said second controller operating in accordance with the data structure stored in said storing step.