Patent ID: 6418144
Filing Date: 2002-07-09
Classification: H04L

Abstract:
A synchronization method of an AAL terminal system of a duplex configuration comprising an acting AAL (ATM Adaptation Layer Type) terminal device and a standby AAL terminal device, for converting STM data into ATM cells, whereinsaid acting AAL terminal device and said standby AAL terminal device comprise frame pulse counters with the predetermined count value set therein in every user connection of STM network; in said acting AAL terminal device having received a cell conversion starting request, starting cell conversion, notifying the starting timing of the cell conversion to said standby AAL terminal device, and starting count of input STM frame pulses by said frame pulse counter; in the standby AAL terminal device having received the starting timing of the cell conversion, starting count of the input STM frame pulses by said frame pulse counter of the corresponding user connection, wherein establishing synchronization between output ATM cells of the acting device and output ATM cells of the standby device in each user connection by said frame pulse counter.