Abstract: The present invention discloses an ATM networking controller, including: an external interfaces and an internal interface; an Interface Processing Module for processing network transmission services and implementing the uplink/downlink transmission of local services and the transparent transmission of non-local services; an OAM Processing Module for implementing automatic topology management and data configuration synchronization through OAM information elements; a Switching and Scheduling Processing Module for scheduling the interconnection services and guaranteeing the QoS thereof; and a Routing or Protection Switching Module for switching a path, implementing self-healing recovery of services, detecting failures, and conducting the corresponding switching protection. An ATM device and an ATM communication network system are disclosed by the present invention as well.

Abstract: A method for realizing timing source synchronization is disclosed, applied to a ring-network including several network nodes wherein each network node selects a timing source from timing sources available for selection according to the quality states of the timing source, synchronizes the timing source, and takes the timing source as an available timing source for other network nodes; when the synchronized timing source is from a network interface, sets the timing source quality state to be sent to the network interface as non-synchronous source state, and sets the timing source quality state to be sent to all the other connected network interfaces as the quality state of the synchronized timing source; otherwise, sets the timing source quality state to be sent to all connected network interfaces as the quality state of the synchronized timing source. By the method, automatic selection and APS of timing source in networks can be realized.

Abstract: The present invention discloses an ATM networking controller, including: an external interfaces and an internal interface; an Interface Processing Module for processing network transmission services and implementing the uplink/downlink transmission of local services and the transparent transmission of non-local services; an OAM Processing Module for implementing automatic topology management and data configuration synchronization through OAM information elements; a Switching and Scheduling Processing Module for scheduling the interconnection services and guaranteeing the QoS thereof; and a Routing or Protection Switching Module for switching a path, implementing self-healing recovery of services, detecting failures, and conducting the corresponding switching protection. An ATM device and an ATM communication network system are disclosed by the present invention as well.