| 摘要 |
PURPOSE: A system for inserting in an idle pattern in a digital trunk, is provided to process pattern loading on an idle digital trunk circuit board, which is generated at a switching circuit of an exchange to reduce a load of the system. CONSTITUTION: A switching circuit(11) switches optional data. A framer(21) codes data from the switching circuit with a line. A line driving circuit(22) transmits a line-coded value to a real digital line. A programmable logic array(20), if a data value transmitted from the switching circuit is an idle channel value, converts channel value in idle call into a pattern value, which is stored and transmitted to the framer. A system for inserting an idle pattern, if the channel value is transmitted to the programmable logic array, transmits the pattern value to the framer from the programmable logic array. |
