| 摘要 |
PURPOSE:To ensure an effective control for the circuit scanning in response to the acceleration of the communication velocity, by giving modification to the contents of the address counter via the circuit connecting unit plus the circuit control unit and the circuit scanning sequence changing unit each and then giving the control to decide the circuit number. CONSTITUTION:Circuit scanning circuit part 7 and circuit connecting unit 2 include respectively address counters 8 and 8', circuit number control units 9 and 9' which perform the switching control of the circuit number mode, and circuit scanning sequence changing units 10 and 10' which set variably the circuit number. And the advancing lock is supplied to counter 8' of unit 2 from circuit part 7. At the same time, part 7 supplies the circuit number mode indicating information plus the circuit scanning sequence indicating information to unit 2. The control is given to unit 2 so that units 9 and 10' may modify the contents of counter 8' and then decide the circuit number. In this way, an effective control is secured for the circuit scanning in response to the acceleration of the communication velocity. |
