Integrated Services Digital Network Isdn

Integrated Services Digital Network Isdn : Support of Ccitt Recommendation X.21, X.21 Bis and X.20 Bis Based Data Terminal Equipments Dtes by A

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Product details

  • Book
  • SABS
  • Pretoria, South Africa
  • English, Afrikaans
  • 0626123283
  • 9780626123284