Definition

hundred call second or centum call second (CCS)

The hundred call second -- also known as the centum call second (CCS) -- is a unit of telecommunications traffic density that is the equivalent of one call (including call attempts and holding time) in a specific channel for 100 seconds in an hour. The 100 seconds need not be, and generally are not, in a contiguous block.

In digital telecommunications, the voice signals are compressed. This makes it 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. Here are three specific examples for a traffic density of 360 CCS:

  • 10 calls, each consuming the full hour during an hour
  • 20 calls, each of which consume 1/2 hour during an hour
  • 600 calls, each of which consume one minute during an hour

The CCS is a more convenient unit in some applications than the erlang, which is the equivalent of one call occupying a channel for an hour. In some instances, a smaller unit than the CCS, known as the call-second, is used. One call-second is equivalent to one call occupying a channel for one second. Thus, 1 CCS = 100 call-seconds = 1/36 erlang.

Contributor(s): Lester Bennett
This was last updated in March 2008
Posted by: Margaret Rouse

Email Alerts

Register now to receive SearchUnifiedCommunications.com-related news, tips and more, delivered to your inbox.
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

More News and Tutorials

Do you have something to add to this definition? Let us know.

Send your comments to techterms@whatis.com

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: