1. International patent pending WO 99/38341, July 27, 1999
2. European patent pending EP 0 932 313 A1, July 28, 1999
3. ITU-T Recommendation E.412, Overall network operation, telephone service, service operation and human factors, Network Management Controls 10/92
4. ITU-T recommendation Q.542, Digital Exchange Design Objectives – Operations and Maintenance 03/93
5. ITU-T Recommendation Q.763, Switching and signalling, Signalling System No. 7 – ISDN user part format and codes