Abstract: In a telephony voice network having at least two connectable endpoint nodes with a trunk therebetween and a trunking alarm associated with each endpoint node, an alarm aggregation method is proposed. The method involves first detecting a trunking alarm associated with one of the endpoint nodes and second detecting a second trunking alarm associated with another of the endpoint nodes. The method aggregates the results of the first and second detecting to assist in determining a condition of the trunk between the two endpoint nodes. Such an out-of-service condition of the trunk may be signaled onto an outgoing T1/E1 connection coupled with the affected trunk. Preferably, plural connectable endpoint node pairs define plural ones of such trunks therebetween with each of the plural trunks having a trunking alarm associated with each endpoint node pair.