• ETSI ETR 138
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ETSI ETR 138

  • Network Aspects (NA); Quality of service indicators for Open Network Provision (ONP) of voice telephony and Integrated Services Digital Network (ISDN)
  • standard by European Telecommunications Standards Institute, 12/01/1997
  • Publisher: ETSI

$15.00$29.50


Enhanced version of ETR138 to incorperate recent advances in the field of QoS study for ISDN and telephony

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