Abstract: A telecommunications quality measurement system has dialers that initiate and receive telephonic test-calls through voice-oriented networks under the control and supervision of test-call-system servers. A test-call-system common server comprises a locking and queuing device that queues lock queries from test-call-system servers. Locks prevent concurrent test-calls to parties of terminating dialers. The test-call-system servers are granted permission to command initiation of test calls, one at the time in a first-come-first-serve manner to a specific party. The test-call-system common server and the terminating dialers are connected to a data-oriented network for facilitating data communication between them. Results from the test calls are sent from the terminating dialers to the appropriate test-call-system servers via the test-call-system common server.