| 摘要 |
PURPOSE:To eliminate the need for complex expansion construction in variation in incoming traffic intensity and an increase of incoming trunks, by providing incoming trunks with the method of remembering arrival order numbers. CONSTITUTION:Incoming trunks ICT1-ICTn, having an arrival order memory relay respectively, remember arrival order numbers with the assistance of a commonly-provided arrival order memory controller WC. On the other hand, connection controller CC making a connection of switch frame SWF is provided with a connecting counting circuit to connect a trunk remembering the same arrival order number to attendant board ATT, thereby making the counting circuit count up by one. |
