Call-second
Encyclopedia
In telecommunication
, a call-second is a unit used to measure communication
s 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, a trunk (link) can carry numerous concurrent calls by means of multiplexing. Hence a particular number of CCS can be carried in infinitely many ways as calls are established and cleared over time. For example 3600 could be one call for an hour, or 2 (possibly concurrent) calls for half an hour each. CCS gives a measure of the average number of concurrent calls (i.e. Erlangs) over a time period of one hour.
Hence:
1 CCS = 100 Call-Seconds = 1/36 erlangs.
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
, a call-second is a unit used to measure communication
Communication
Communication is the activity of conveying meaningful information. Communication requires a sender, a message, and an intended recipient, although the receiver need not be present or aware of the sender's intent to communicate at the time of communication; thus communication can occur across vast...
s traffic
Traffic
Traffic on roads may consist of pedestrians, ridden or herded animals, vehicles, streetcars and other conveyances, either singly or together, while using the public way for purposes of travel...
density.
Note 1: A call
Telephone call
A telephone call is a connection over a telephone network between the calling party and the called party.-Information transmission:A telephone call may carry ordinary voice transmission using a telephone, data transmission when the calling party and called party are using modems, or facsimile...
-second is equivalent to 1 call with a duration of 1 second.
Note 2: One user
User (telecommunications)
In telecommunications, a user is a person, organization, or other entity that employs the services provided by a telecommunication system, or by an information processing system, for transfer of information....
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
CCS
-Geosynthetics:*Cellular confinement systems , a honeycombed geosythethetic matrix filled with granular material used for soil confinement, stabilization and reinforcement.-Places:*Abbreviation for Caracas, Venezuela....
(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
Erlang unit
The erlang is a dimensionless unit that is used in telephony as a statistical measure of offered load or carried load on service-providing elements such as telephone circuits or telephone switching equipment. It is named after the Danish telephone engineer A. K...
= 1 traffic unit.
In a communication network, a trunk (link) can carry numerous concurrent calls by means of multiplexing. Hence a particular number of CCS can be carried in infinitely many ways as calls are established and cleared over time. For example 3600 could be one call for an hour, or 2 (possibly concurrent) calls for half an hour each. CCS gives a measure of the average number of concurrent calls (i.e. Erlangs) over a time period of one hour.
Hence:
1 CCS = 100 Call-Seconds = 1/36 erlangs.