| 摘要 |
PURPOSE:To equalize the selection of a junction line by providing the first memory which stores a line group number corresponding to channel numbers and also providing the second memory which stores the junction line and a function line selection ratio corresponding to the circuit group number. CONSTITUTION:A memory 200 in a exchange 100 has two memories, the first memory and the second one, and other memories. The first memory stores the line group number corresponding to the channel numbers and the second one stores the junction line and the junction line selection ratio corresponding to line group numbers. When a subscriber 320 accesses a channel number NO, the first memory accesses a line group number G1 which selects a junction line CEN 00 that makes the content of the second memory zero subracting one from the memory. On the other hand, when a subscriber 321 accesses the channel number NO, a junction line CEN 01 is selected because of the zero state of the 2nd memory of the circuit CEN 00 and makes the content of the second memory one subtracting one from the memory. Thus, whenever the second memory goes to zero, the next junction line is selected. |
