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Voice Feature Guide 01

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Calling Indication

Calling Indication

In a voice call, common calling indications (CINDs) are as follows:
  • Call attempt per second (CAPS): Used to measure the volume of concurrent calls.
  • Busy hour call attempts (BHCA): Used to measure the system capability of processing calls. BHCA = CAPS/3600.
  • Erlang (ERL): Used to measure the traffic. Erl = Calls per hour x Average call hold duration (unit: s)/3600.
  • Call loss count: Indicates failed calls.
  • Convergence ratio: Used to measure the ratio of system trunk capacity to user capacity.
Updated: 2019-02-22

Document ID: EDOC1100067358

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