In VoIP, hairpin (or hairpining) is the means to send a call back in the direction that it came from. If a call cannot be routed over IP to a gateway that is closer to the target telephone, the call typically is sent back out the local zone the same way from which it came.
(adj.)Refers to the transmission of data in just one direction at a time. For example, a walkie-talkie is a half-duplex device because only one party can talk at a time. In contrast, a telephone is a full-duplex device because both parties can talk simultaneously. Duplex modes often are used in reference to network data transmissions. […]
- half height
Some older PCs supported both full-height and half-height bays for disk drives and other mass storage devices. Today, all bays are half-height.
- half life
Also called life expectancy or shelf life, the time it takes for a data-storing medium to lose half of its strength. Floppy disks and magnetic hard drives have a half life of between five and seven years. Optical media, such as CD-Rs, have a half life of about 30 years. The term comes from the […]
In printing, a continuous tone image, such as a photograph, that has been converted into a black-and-white image. Halftones are created through a process called dithering, in which the density and pattern of black and white dots are varied to simulate different shades of gray. In conventional printing, halftones are created by photographing an image […]
(1) A person who is licensed to operate a ham radio. (2) Automatic spam filters classify e-mail as either spam or ham (meaning not spam).