callback

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callback

(programming)
A scheme used in event-driven programs where the program registers a subroutine (a "callback handler") to handle a certain event. The program does not call the handler directly but when the event occurs, the run-time system calls the handler, usually passing it arguments to describe the event.

callback

(communications, security)
A user authentication scheme used by some computers running dial-up services. The user dials in to the computer and gives his user name and password. The computer then hangs up the connection and uses an auto-dial modem to call back to the user's registered telephone number. Thus, if an unauthorised person discovers a user's password, the callback will go, not to him, but to the owner of that login who will then know that his account is under attack.

However, some PABXs can be fooled into thinking that the caller has hung up by sending them a dial tone. When the computer tries to call out on the same line it is not actually dialing through to the authorised user but is still connected to the original caller.

callback

(communications)

callback

An authentication technique that calls the sender back. After connection is made, the receiving side breaks the connection and calls the sender to ensure that the logon was made from the authorized computer. Callback prevents a stolen ID and password from being used on a different machine. See also Web callback.
References in periodicals archive ?
Not all callback solutions are the same, however, nor are all companies that provide such capabilities.
attack to maintain communication with an infected machine by way of callbacks,
Genesys Voice Callback enables companies to provide their customers the option to receive a callback instead of waiting on hold for a customer service agent when wait times are long.
Parameter callbacks - apply to a single parameter; information includes: automatic callbacks, user callbacks, and attributes specifying value limits, grid, and other constraints
Determine which callbacks were Right-Party Contacts as opposed to inbound noise;
Servion Global Solutions, a global provider of Business Response Systems, today announced the general availability of CallBack Manager, the first callback scheduler built on top of Microsoft(R) Speech Server 2004 .
Since its inception in 1995, VHT's patented award-winning Virtual Queuing technology has provided callback solutions focused on enhancing the customer experience for financial services, energy utility, insurance, telecommunications, cable, wireless and retail corporations such as Wells Fargo, Baltimore Gas & Electric, Direct Line, BellSouth, Cox Communications, Bell Mobility, Ticketmaster and Avon.
Feedback from our Customer Service Specialists suggests their call processing time is lessened when working with a customer who has opted for a Virtual Hold callback.
The customer's needs dictated an immediate call to action with the implementation of Virtual Hold, a solution that offered proven and accurate predictive callback functionality in a short time frame," stated Joanna Shore, author of the story.
The latest version also includes a new graphical user interface for screen pops and the ability to conference a callback, as well as other productivity-enhancing features.
Prescription callbacks lead to inconvenienced patients, duplication of efforts by doctors and their staff and increased dispensing costs by pharmacists.
We have already seen increased patient satisfaction as a result of our greater confidence and reduction in patient callbacks.