IP Telephony: Substitute or Supplement? Dr Tim Kelly, International Telecommunication Union, Telecoms @ The Internet VI IIR, Geneva, 12 June 2000 The views.
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IP Telephony: Economic implications and impact on PTOs Dr Tim Kelly, International Telecommunication Union, IP Telephony Workshop, Geneva, 14 June 2000.
Abdellatif O. Abdellatif Sudatel Telecom Group
