Non intrusive self test capability in the utopia level two bus

摘要

Systems and methods are provided for non intrusive self test capability in the UTOPIA level 2 bus within the ATM switch/multiplexer architecture. These systems and methods make use of the characteristics of ATM transport and the UTOPIA level 2 bus interface. The system includes an ATM switch/multiplexer architecture having an ATM layer device and a number of physical layer devices. A bus couples the ATM layer device to the number of physical layer devices. A self test circuit is coupled to the bus which is adapted to send received ATM cells back to the common layer circuit pack in order to perform a self test function without requiring additional wires or bandwidth.