Call-second

In telecommunication, a call-second is a unit used to measure communications traffic density.

Note 1: A call-second is equivalent to 1 call with a duration of 1 second.

Note 2: One user making two 75-second calls is equivalent to two users each making one 75-second call. Each case produces 150 call-seconds of traffic.

Note 3: The acronym CCS (Centum Call Seconds) is often used to describe 100 call-seconds.

Note 4: 3600 call-seconds = 36 CCS = 1 call-hour.

Note 5: 3600 call-seconds per hour = 36 CCS per hour = 1 call-hour per hour = 1 erlang = 1 traffic unit.

In a communication network, it is possible for one channel to carry numerous calls simultaneously by means of multiplexing. In theory, there are many ways in which a channel can carry a particular number of CCS.

One call-second is equivalent to one call occupying a channel for one second. Thus, 1 CCS = 100 call-seconds = 1/36 erlang.

1 erlang = 36ccs

References

•  This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22. (in support of MIL-STD-188).

°Nommy Paul: This unit can thus be also used to calculate traffic carried in a P.S network