Short for Synchronous Digital Hierarchy, an international standard for synchronous data transmission over fiber optic cables. The North American equivalent of SDH is SONET.
SDH defines a standard rate of transmission at 155.52 Mbps, which is referred to as STS-3 at the electrical level and STM-1 for SDH. STM-1 is equivalent to SONET’s Optical Carrier (OC) levels -3.
Short for Secure Digital High Capacity, SDHC is a type of flash memory card based on the SDA 2.00 specification. The SDA 2.00 specification enables SD cards to reach higher capacities from 4GB to 32GB, and growing. SDHC uses a new technology, and as such these cards are not backwards compatible with SD format devices. […]
- Software Development Kit (SDK)
Short for software development kit, a programming package that enables a programmer to develop applications for a specific platform. Typically an SDK includes one or more APIs, programming tools, and documentation.
(1) Acronym for synchronous data link control, a communications protocol used in IBM’s SNA networks. SDLC is similar to HDLC, an ISO standard. (2) Acronym for system development life cycle. SDLC is the process of developing information systems through investigation, analysis, design, implementation and maintenance. SDLC is also known as information systems development or application […]
- SDMA - spatial division multiple access
Short for spatial division multiple access, SDMA is a satellite communications mode for using data from antenna arrays in wireless communications systems. At the base station, SDMA continually adapts to the radio environment, providing each user with uplink and downlink signals of the highest possible quality. At the network level, this improved base station performance […]
Short for the Secure Digital Music Initiative, a forum comprised of more than 200 IT, consumer electronics, security technology, ISP and recording industry companies with the purpose of developing technology specifications that protect the playing, storing and distributing of digital music. Specifically, the goals of the SDMI were to provide consumers with convenient access to […]