Patent ID: 8644300

Claim:
A method for generating configuration data for use in the migration of subscribers from a first telephone switching system over to a second telephone switching system in a telecommunications network, each subscriber having an associated telephone channel and a telephone dialing number for telephone calls conducted via the first telephone switching system, the method comprising: monitoring signaling information on telephone channels associated with the subscribers for telephone calls conducted via the first telephone switching system; analyzing the monitored signaling information in relation to call data produced by the first telephone switching system for the calls to identify a relationship between the monitored signaling information and the call data for a call conducted by a subscriber, the monitored signaling information for the calls being different from the call data produced by the first telephone switching system for the calls, wherein the analyzing comprises identifying a temporal correlation between one or more timestamps in the call data and the monitored signaling information; and storing configuration data based on the identified relationship, the configuration data being for configuring the second telephone switching system with a mapping between the associated telephone channel and the telephone dialing number for the subscriber.