Patent ID: 8248953

Claim:
A method comprising: comparing, at a call quality monitoring device, a first media quality report for a communication from a first node with a second media quality report for the communication from a second node, the first node comprising an ingress node of a first domain for the communication and the second node comprising an egress node of the first domain for the communication; determining that a difference between at least one aspect value of the first media quality report and at least one corresponding aspect value of the second media quality report exceeds a first threshold; upon determining that the difference exceeds the first threshold: determining a first path between the first node and the second node used by the communication, the first path comprising a plurality of nodes between the first node and the second node; and isolating at least one source from among the plurality of nodes between the first node and the second node causing the difference between the first media quality report and the second media quality report; determining whether both the first media quality report and the second media quality report indicate that the at least one quality characteristic of the communication is above a second threshold; upon determining that both the first media quality report and the second media quality report indicate that the at least one quality characteristic of the communication is above the second threshold, generating a message indicating that the degradation of the communication occurred downstream of the egress node; and upon determining that both the first media quality report and the second media quality report indicate that the at least one quality characteristic of the communication is below the second threshold, generating a message indicating that the degradation of the communication occurred upstream of the ingress node.