centum call second (CCS)
Data traffic in transmission networks is specified in the number of connections per unit of time, iIn Call Seconds or Centum Call Seconds( CCS), where the centum stands for one hundred. In other words, in one hundred call seconds.
Here, the traffic density in Centum Call Seconds is defined by the time to establish a connection and the hold time for 100 seconds within one hour.
There is a direct relationship between Call Seconds, the CCS value, Call Hours, and Erlang, also a traffic load unit. One call- second corresponds to one call in one second. 3600 call seconds is equivalent to 36 centum call seconds (CCS) or one call hour. This in turn corresponds to one Erlang or Traffic Unit( TU).