Patent ID: 8498634

Claim:
A method comprising: monitoring, at a monitoring device, a signaling link between a mobile switching center and a service control point in a telecommunications network; detecting, on the signaling link by the monitoring device, a connection request comprising a called address and a caller address; detecting, on the signaling link by the monitoring device, a disconnection request comprising the called address and the caller address; determining, at the monitoring device, that a first time period between the detection of the connection request and the detection of the disconnection request is greater than a predetermined time period and greater than a second predetermined time period that is greater than the predetermined time period; determining content of a training message based on the determining that the first time period is greater than the predetermined time period and greater than the second predetermined time period; and responsive to determining that the first time period is greater than the predetermined time period and greater than the second predetermined time period, transmitting the training message to the caller address.