Communication network disturbance management method using top-down method

A disturbance management method for a communication network using a top-down method comprising:

• detecting at least one of line quality information and traffic matrix information for each line regarding connection easiness and service stability in all lines of the communication network, for comparing said at least one of the line quality information and the traffic matrix information for each line with a previously-set communication network operational management reference value, and for selecting a problem line;
• extracting said at least one of the line quality information and the traffic matrix information for the problem line when the problem line is selected from among all the lines of the communication network;
• judging whether a position of a problem for the problem line is at a sending side or a receiving side by using the extracted said at least one of line quality information and the traffic matrix information, and for exactly determining the position of the problem according to an analysis result of properties of other lines and information on whether the position of the problem for the problem line is on the sending side or the receiving side of the problem line;
• and
• finding a reason for the problem line by using a call disconnection reason code provided by the communication network, and solving the problem.