Callback Addon

Definition

From Wikipedia, the free encyclopedia
In telecommunications, a callback (also written as call-back) occurs when the originator of a call is immediately called back in a second call as a response.

In order to use a callback service, a subscriber is allocated a unique number in, which must first be dialled in order to trigger a return call. This is known as a Direct Inbound Dialing (DID) number (Access Number). Where Caller ID is available, it may be possible to use the same DID number for many different subscribers, as the callback system will be able to recognize each subscriber's registered number.

On hearing a ringing tone for a few seconds, the subscriber simply hangs up and awaits the callback. On receiving this, usually within a few seconds, the customer picks up the phone and dials the required number.

The cost of making a telephone call via callback consists of two parts, as the caller is effectively paying for an outbound and inbound call at the same time. If it costs 20 US cents a minute to call Nigeria from the US, and 8 cents a minute to call Spain from the US, then the caller will pay a total of 28 US cents a minute.

NOTE: If you want to use Callback – make sure your DID provider sends correct CallerID information. Without CallerID – you will not be able to use Callback.

Common Callback diagram