Introduction to IP Telephony, Why and How Companies Are Upgrading Private Telephone Systems to Use Voip Services

by Lawrence Harte

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  • ISBN10 0974278777
  • ISBN13 9780974278773
  • Publish Date 12 May 2003
  • Publish Status Unknown
  • Publish Country US
  • Imprint Althos
  • Format Paperback (US Trade)
  • Pages 88
  • Language English