PURPOSE: To make the size of the hardware scale small by copying a primitive load cell generated from a primitive load cell generating circuit by input port number of a tested ATM switch and giving routing information to the header so as to form a load cell.
CONSTITUTION: A primitive load cell generating circuit 1 generates a primitive load cell 6 as a test cell and a copy circuit 2 copies the primitive load cell 6 corresponding to an input port of an ATM switch 5. Then a routing load circuit 3 designates the share destination to the ATM switch in the unit of input ports for the primitive load cell 6 to provide an output of a load cell 7 with header information given thereto to the ATM switch 5. Then an output timing of the load cell 7 outputted from the ATM excess load test control voltage 4 is set by a test cell generation control section 8 based on test pattern information 9. The control section 8 sets the frequency of occurrence of the primitive load cell 6 generated by the circuit 1, number of outputs from the copy circuit 3 and content of header information.
SUZUKI KOJI
TAKAGI KOJI
OSHIMA HITOSHI
OKAMOTO YASUSHI
KATAKURA HITOSHI
NIPPON TELEGRAPH & TELEPHONE
HITACHI LTD
OKI ELECTRIC IND CO LTD
FUJITSU LTD
| JPH0583291A | 1993-04-02 | |||
| JPH0371750A | 1991-03-27 | |||
| JPH05136814A | 1993-06-01 |