Patent ID: 7154894
Filing Date: 2006-12-26
Classification: H04J,H04L

Abstract:
1. An ATM cell service apparatus which accommodates an ATM cell in an optical synchronous communications network through an N.A. (North America) asynchronous communications network, comprising: an optical synchronous communications network signal terminating unit terminating a signal in an optical synchronous communications network; an N.A. asynchronous communications network signal terminating unit terminating a signal in an N.A. asynchronous communications network; first and second ATM cell extraction units respectively extracting an ATM cell from a signal of the optical synchronous communications network and a signal of the N.A. asynchronous communications network; first and second ATM cell mapping units respectively mapping ATM cells respectively extracted said first and second ATM cell extraction units in signals of the N.A. asynchronous communications network and the optical synchronous communications network respectively; and first and second signal transmission units respectively transmitting a signal of the N.A. asynchronous communications network in which the ATM cell is mapped, and a signal of the optical synchronous communications network in which the ATM cell is mapped, wherein when an ATM cell input from an optical synchronous communications network or an N.A. asynchronous communications network is faulty, said first or second signal transmission unit, respectively, generates an ATM cell exclusively informing that a fault has occurred, and transmits the generated ATM cell.